Update whatsnew

This closes https://github.com/syncthing/syncthing-lite/issues/106

.travis.yml

@@ -0,0 +1,32 @@
+sudo: required
+language: android
+jdk: oraclejdk8
+dist: trusty
+
+# Install Android SDK
+android:
+  components:
+    - tools
+    - platform-tools
+    - build-tools-28.0.2
+    - android-28
+    - extra-android-m2repository
+
+before_install:
+  # Hack to accept Android licenses
+  - yes | sdkmanager "platforms;android-27"
+  - yes | sdkmanager "platforms;android-28"
+
+# Cache gradle dependencies
+# https://docs.travis-ci.com/user/languages/android/#Caching
+before_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+cache:
+  directories:
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/
+
+script:
+  - ./gradlew lint
+  - ./gradlew assembleDebug

.tx/config

@@ -0,0 +1,9 @@
+[main]
+host = https://www.transifex.com
+
+[syncthing-lite.stringsxml]
+file_filter = app/src/main/res/values-<lang>/strings.xml
+source_file = app/src/main/res/values/strings.xml
+source_lang = en
+type = ANDROID
+lang_map = af_ZA: af-rZA, am_ET: am-rET, ar_AE: ar-rAE, ar_BH: ar-rBH, ar_DZ: ar-rDZ, ar_EG: ar-rEG, ar_IQ: ar-rIQ, ar_JO: ar-rJO, ar_KW: ar-rKW, ar_LB: ar-rLB, ar_LY: ar-rLY, ar_MA: ar-rMA, ar_OM: ar-rOM, ar_QA: ar-rQA, ar_SA: ar-rSA, ar_SY: ar-rSY, ar_TN: ar-rTN, ar_YE: ar-rYE, arn_CL: arn-rCL, as_IN: as-rIN, az_AZ: az-rAZ, ba_RU: ba-rRU, be_BY: be-rBY, bg_BG: bg-rBG, bn_BD: bn-rBD, bn_IN: bn-rIN, bo_CN: bo-rCN, br_FR: br-rFR, bs_BA: bs-rBA, ca_ES: ca-rES, co_FR: co-rFR, cs_CZ: cs-rCZ, cy_GB: cy-rGB, da_DK: da-rDK, de_AT: de-rAT, de_CH: de-rCH, de_DE: de-rDE, de_LI: de-rLI, de_LU: de-rLU, dsb_DE: dsb-rDE, dv_MV: dv-rMV, el_GR: el-rGR, en_AU: en-rAU, en_BZ: en-rBZ, en_CA: en-rCA, en_GB: en-rGB, en_IE: en-rIE, en_IN: en-rIN, en_JM: en-rJM, en_MY: en-rMY, en_NZ: en-rNZ, en_PH: en-rPH, en_SG: en-rSG, en_TT: en-rTT, en_US: en-rUS, en_ZA: en-rZA, en_ZW: en-rZW, es_AR: es-rAR, es_BO: es-rBO, es_CL: es-rCL, es_CO: es-rCO, es_CR: es-rCR, es_DO: es-rDO, es_EC: es-rEC, es_ES: es-rES, es_GT: es-rGT, es_HN: es-rHN, es_MX: es-rMX, es_NI: es-rNI, es_PA: es-rPA, es_PE: es-rPE, es_PR: es-rPR, es_PY: es-rPY, es_SV: es-rSV, es_US: es-rUS, es_UY: es-rUY, es_VE: es-rVE, et_EE: et-rEE, eu_ES: eu-rES, fa_IR: fa-rIR, fi_FI: fi-rFI, fil_PH: fil-rPH, fo_FO: fo-rFO, fr_BE: fr-rBE, fr_CA: fr-rCA, fr_CH: fr-rCH, fr_FR: fr-rFR, fr_LU: fr-rLU, fr_MC: fr-rMC, fy_NL: fy-rNL, ga_IE: ga-rIE, gd_GB: gd-rGB, gl_ES: gl-rES, gsw_FR: gsw-rFR, gu_IN: gu-rIN, ha_NG: ha-rNG, hi_IN: hi-rIN, hr_BA: hr-rBA, hr_HR: hr-rHR, hsb_DE: hsb-rDE, hu_HU: hu-rHU, hy_AM: hy-rAM, id_ID: id-rID, ig_NG: ig-rNG, ii_CN: ii-rCN, is_IS: is-rIS, it_CH: it-rCH, it_IT: it-rIT, iu_CA: iu-rCA, ja_JP: ja-rJP, ka_GE: ka-rGE, kk_KZ: kk-rKZ, kl_GL: kl-rGL, km_KH: km-rKH, kn_IN: kn-rIN, ko_KR: ko-rKR, kok_IN: kok-rIN, ky_KG: ky-rKG, lb_LU: lb-rLU, lo_LA: lo-rLA, lt_LT: lt-rLT, lv_LV: lv-rLV, mi_NZ: mi-rNZ, mk_MK: mk-rMK, ml_IN: ml-rIN, mn_CN: mn-rCN, mn_MN: mn-rMN, moh_CA: moh-rCA, mr_IN: mr-rIN, ms_BN: ms-rBN, ms_MY: ms-rMY, mt_MT: mt-rMT, nb_NO: nb-rNO, ne_NP: ne-rNP, nl_BE: nl-rBE, nl_NL: nl-rNL, nn_NO: nn-rNO, nso_ZA: nso-rZA, oc_FR: oc-rFR, or_IN: or-rIN, pa_IN: pa-rIN, pl_PL: pl-rPL, prs_AF: prs-rAF, ps_AF: ps-rAF, pt_BR: pt-rBR, pt_PT: pt-rPT, qut_GT: qut-rGT, quz_BO: quz-rBO, quz_EC: quz-rEC, quz_PE: quz-rPE, rm_CH: rm-rCH, ro_RO: ro-rRO, ru_RU: ru-rRU, rw_RW: rw-rRW, sa_IN: sa-rIN, sah_RU: sah-rRU, se_FI: se-rFI, se_NO: se-rNO, se_SE: se-rSE, si_LK: si-rLK, sk_SK: sk-rSK, sl_SI: sl-rSI, sma_NO: sma-rNO, sma_SE: sma-rSE, smj_NO: smj-rNO, smj_SE: smj-rSE, smn_FI: smn-rFI, sms_FI: sms-rFI, sq_AL: sq-rAL, sr_BA: sr-rBA, sr_CS: sr-rCS, sr_ME: sr-rME, sr_RS: sr-rRS, sv_FI: sv-rFI, sv_SE: sv-rSE, sw_KE: sw-rKE, syr_SY: syr-rSY, ta_IN: ta-rIN, te_IN: te-rIN, tg_TJ: tg-rTJ, th_TH: th-rTH, tk_TM: tk-rTM, tn_ZA: tn-rZA, tr_TR: tr-rTR, tt_RU: tt-rRU, tzm_DZ: tzm-rDZ, ug_CN: ug-rCN, uk_UA: uk-rUA, ur_PK: ur-rPK, uz_UZ: uz-rUZ, vi_VN: vi-rVN, wo_SN: wo-rSN, xh_ZA: xh-rZA, yo_NG: yo-rNG, zh_CN: zh-rCN, zh_HK: zh-rHK, zh_MO: zh-rMO, zh_SG: zh-rSG, zh_TW: zh-rTW, zu_ZA: zu-rZA, no_NO: no-rNO, he_IL: iw-rIL, he: iw, id:in

README.md

@@ -1,31 +1,42 @@
 # Syncthing Lite
 
+[![Build Status](https://travis-ci.org/syncthing/syncthing-lite.svg?branch=master)](https://travis-ci.org/syncthing/syncthing-lite)
 [![MPLv2 License](https://img.shields.io/badge/license-MPLv2-blue.svg?style=flat-square)](https://www.mozilla.org/MPL/2.0/)
 
 This project is an Android app, that works as a client for a [Syncthing][1] share (accessing 
-Syncthing devices in the same way a client-server file sharing app access its proprietary server). 
+Syncthing devices in the same way a client-server file sharing app accesses its proprietary server). 
 
 This is a client-oriented implementation, designed to work online by downloading and 
 uploading files from an active device on the network (instead of synchronizing a local copy of 
-the entire repository). This is quite different from the way the [syncthing-android][2] works, 
-and its useful from those devices that cannot or wish not to download the entire repository (for 
+the entire repository).
+Due to that, you will see a sync progress of 0% at other devices (and this is expected).
+This is quite different from the way the [syncthing-android][2] works, 
+and it's useful for those devices that cannot or do not wish to download the entire repository (for 
 example, mobile devices with limited storage available, wishing to access a syncthing share).
 
-This project is based on [syncthing-java][3], a java implementation of Syncthing protocols.
+This project is based on syncthing-java (which is in this repository too), a java implementation of Syncthing protocols.
+
+Due to the behaviour of this App and the [behaviour of the Syncthing Server](https://github.com/syncthing/syncthing/issues/5224),
+you can't reconnect for some minutes if the App was killed (due to removing from the recent App list) or the connection was interrupted.
+This does not apply to local discovery connections.
+
+[<img alt="Get it on F-Droid" src="https://f-droid.org/badge/get-it-on.png" height="80">](https://f-droid.org/packages/net.syncthing.lite/)
+[<img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png" height="80">](https://play.google.com/store/apps/details?id=net.syncthing.lite)
+
+## Translations
+
+The project is translated on [Transifex](https://www.transifex.com/syncthing/syncthing-lite/).
+Requests for new languages are always accepted (but this happens manually because there is no option to accept it automatically).
 
 ## Building
 
-The project uses a standard Android build, and requires the Android SDK. The easiest option is if
-you install [Android Studio][4] and import the project.
-
-The syncthing-java library is not stable yet. If you encounter any build errors, you probably have
-to build it from source. To do this, clone the repo and run `gradle install`.
+The project uses a standard Android build, and requires the Android SDK. The easiest option is to
+install [Android Studio][3] and import the project.
 
 ## License
-All code is licensed under the [MPLv2 License][5].
+All code is licensed under the [MPLv2 License][4].
 
 [1]: https://syncthing.net/
 [2]: https://github.com/syncthing/syncthing-android
-[3]: https://github.com/Nutomic/syncthing-java
-[4]: https://developer.android.com/studio/index.html
-[5]: LICENSE
+[3]: https://developer.android.com/studio/index.html
+[4]: LICENSE

Releasing.md

@@ -0,0 +1,8 @@
+# Releasing
+
+- do tests
+- update translations using ``tx pull -a -af`` (as extra merge request or branch for the case it does not build correctly)
+- update the version name and version code of the app
+- update the changelog at [app/src/main/play/en-GB/whatsnew](https://github.com/syncthing/syncthing-lite/blob/master/app/src/main/play/en-GB/whatsnew)
+- create a tag/ release in GitHub with an changelog; The tag name should be the version number
+- F-Droid picks up the release by the tag; additonally, the tag triggers a CI build which uploads the generated APK to Google Play

Roadmap.md

@@ -0,0 +1,22 @@
+# Roadmap
+
+## What should happen
+
+- fixing bugs and crashs
+  - just create a issue WITH a detailed crash report (not: it does not work)
+  - search if there is an other issue for it before creating a new one
+- showing more details in the UI (<https://github.com/syncthing/syncthing-lite/issues/44>)
+- add option to manually select the IP address of an device (<https://github.com/syncthing/syncthing-lite/issues/25>)
+- allow custom discovery servers or disabling device discovery (<https://github.com/syncthing/syncthing-lite/issues/105>)
+- downloading all files of an folder (<https://github.com/syncthing/syncthing-lite/issues/34>)
+- selective folder sharing (<https://github.com/syncthing/syncthing-lite/issues/17>)
+- better server offline handling (<https://github.com/syncthing/syncthing-lite/issues/63>)
+- file uploading support (it currently does not work) <https://github.com/syncthing/syncthing-lite/issues/70>
+
+## What could happen
+
+- thumbnails (<https://github.com/syncthing/syncthing-lite/issues/37>)
+
+## What will not happen
+
+- additional encryption within the App (see <https://github.com/syncthing/syncthing-lite/issues/85>)

app/build.gradle

@@ -1,18 +1,28 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-kapt'
+apply plugin: 'com.github.ben-manes.versions'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'com.github.triplet.play'
 
 android {
     compileSdkVersion 27
-    buildToolsVersion "27.0.2"
+    buildToolsVersion "28.0.2"
     dataBinding.enabled = true
+
+    playAccountConfigs {
+        defaultAccountConfig {
+            jsonFile = file(System.getenv("SYNCTHING_RELEASE_PLAY_ACCOUNT_CONFIG_FILE") ?: 'keys.json')
+        }
+    }
+
     defaultConfig {
         applicationId "net.syncthing.lite"
-        minSdkVersion 19
-        targetSdkVersion 25
-        versionCode 2
-        versionName "0.1"
+        minSdkVersion 21
+        targetSdkVersion 26
+        versionCode 17
+        versionName "0.3.7"
         multiDexEnabled true
+        playAccountConfig = playAccountConfigs.defaultAccountConfig
     }
     sourceSets {
         main.java.srcDirs += "src/main/kotlin"
@@ -21,26 +31,72 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    signingConfigs {
+        release {
+            storeFile = {
+                def path = System.getenv("SYNCTHING_LITE_RELEASE_STORE_FILE")
+                return (path) ? file(path) : null
+            }()
+            storePassword System.getenv("SIGNING_PASSWORD") ?: ""
+            keyAlias System.getenv("SYNCTHING_LITE_RELEASE_KEY_ALIAS") ?: ""
+            keyPassword System.getenv("SIGNING_PASSWORD") ?: ""
+        }
+    }
+    buildTypes {
+        debug {
+            minifyEnabled false
+        }
+        release {
+            signingConfig signingConfigs.release
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    packagingOptions {
+        exclude 'META-INF/*'
+    }
+    dataBinding {
+        enabled = true
+    }
+}
+
+
+play {
+    jsonFile = file(System.getenv("SYNCTHING_RELEASE_PLAY_ACCOUNT_CONFIG_FILE") ?: 'keys.json')
+    uploadImages = true
+    track = 'production'
 }
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    kapt "com.android.databinding:compiler:$build_tools_version"
-    implementation "com.android.support:appcompat-v7:$support_version"
-    implementation "com.android.support:recyclerview-v7:$support_version"
-    implementation "com.android.support:support-v4:$support_version"
+    implementation "org.jetbrains.anko:anko-commons:$anko_version"
+    implementation "org.jetbrains.anko:anko-coroutines:$anko_version"
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0'
     implementation "com.android.support:design:$support_version"
-    implementation "com.android.support:cardview-v7:$support_version"
-    implementation ("com.github.Nutomic:syncthing-java:0.1") {
-        exclude group: 'commons-logging', module:'commons-logging'
-        exclude group: 'commons-codec'
-        exclude group: 'org.apache.httpcomponents', module:'httpclient'
+    implementation "com.android.support:preference-v14:$support_version"
+    implementation "com.android.support:support-v4:$support_version"
+    implementation 'android.arch.lifecycle:extensions:1.1.1'
+
+    /**
+     * syncthing-java depends on the Apache HTTP Client
+     * https://github.com/syncthing/syncthing-java/blob/dd020737ba5fc6a7c681a1d258025b8ddb2e8f67/core/build.gradle#L9
+     *
+     * Android itself contains an older version of this HTTP Client. Due to that, there is an
+     * extra version of it which does not cause conflicts with the builtin client of Android.
+     *
+     * This extra implementation is included below. As this other version is used,
+     * it's ignored as dependency of syncthing-java.
+     */
+    implementation(project(':syncthing-client')) {
+        exclude group: 'commons-logging', module: 'commons-logging'
         exclude group: 'org.slf4j'
         exclude group: 'ch.qos.logback'
     }
-    implementation 'org.apache.httpcomponents:httpclient-android:4.3.5.1'
+
     implementation 'sk.baka.slf4j:slf4j-handroid:1.7.26'
     implementation 'com.google.zxing:android-integration:3.3.0'
-    implementation 'com.nononsenseapps:filepicker:2.5.2'
-    implementation 'uk.co.markormesher:android-fab:2.0.0'
+    implementation 'com.google.zxing:core:3.3.0'
+    implementation 'com.github.apl-devs:appintro:v4.2.3'
+
+    implementation project(':syncthing-repository-android')
 }

app/lint.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<lint>
+    <issue id="MissingTranslation" severity="ignore" />
+
+	<issue id="GoogleAppIndexingWarning" severity="ignore" />
+
+	<issue id="InvalidPackage" severity="ignore" />
+
+	<issue id="OldTargetApi" severity="ignore" />
+</lint>

app/proguard-rules.pro

@@ -0,0 +1,92 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /home/jonas/android-studio/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# ensure that stack traces make sense
+-keepattributes SourceFile,LineNumberTable
+
+# this library uses factories with reflection
+-keep class net.jpountz.lz4.** { *; }
+
+# from https://github.com/Kotlin/kotlinx.coroutines/blob/master/ui/kotlinx-coroutines-android/example-app/app/proguard-rules.pro
+# kotlin coroutines crash without it
+-keepclassmembernames class kotlinx.** {
+  volatile <fields>;
+}
+
+# fix detecting the main dispatcher
+-keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
+
+# disable warnings
+-dontwarn com.google.protobuf.UnsafeUtil
+-dontwarn com.google.protobuf.UnsafeUtil$1
+-dontwarn net.jpountz.util.UnsafeUtils
+-dontwarn org.bouncycastle.cert.dane.fetcher.JndiDANEFetcherFactory
+-dontwarn org.bouncycastle.cert.dane.fetcher.JndiDANEFetcherFactory$1
+-dontwarn org.bouncycastle.jce.provider.X509LDAPCertStoreSpi
+-dontwarn org.bouncycastle.mail.smime.CMSProcessableBodyPart
+-dontwarn org.bouncycastle.mail.smime.CMSProcessableBodyPartInbound
+-dontwarn org.bouncycastle.mail.smime.CMSProcessableBodyPartOutbound
+-dontwarn org.bouncycastle.mail.smime.examples.CreateCompressedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateEncryptedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateLargeCompressedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateLargeEncryptedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateLargeSignedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateSignedMail
+-dontwarn org.bouncycastle.mail.smime.examples.CreateSignedMultipartMail
+-dontwarn org.bouncycastle.mail.smime.examples.ExampleUtils
+-dontwarn org.bouncycastle.mail.smime.examples.ReadCompressedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ReadEncryptedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ReadLargeCompressedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ReadLargeEncryptedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ReadLargeSignedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ReadSignedMail
+-dontwarn org.bouncycastle.mail.smime.examples.SendSignedAndEncryptedMail
+-dontwarn org.bouncycastle.mail.smime.examples.ValidateSignedMail
+-dontwarn org.bouncycastle.mail.smime.handlers.multipart_signed
+-dontwarn org.bouncycastle.mail.smime.handlers.multipart_signed$LineOutputStream
+-dontwarn org.bouncycastle.mail.smime.handlers.PKCS7ContentHandler
+-dontwarn org.bouncycastle.mail.smime.handlers.pkcs7_mime
+-dontwarn org.bouncycastle.mail.smime.handlers.pkcs7_signature
+-dontwarn org.bouncycastle.mail.smime.handlers.x_pkcs7_mime
+-dontwarn org.bouncycastle.mail.smime.handlers.x_pkcs7_signature
+-dontwarn org.bouncycastle.mail.smime.SMIMECompressed
+-dontwarn org.bouncycastle.mail.smime.SMIMECompressedGenerator
+-dontwarn org.bouncycastle.mail.smime.SMIMECompressedGenerator$1
+-dontwarn org.bouncycastle.mail.smime.SMIMECompressedGenerator$ContentCompressor
+-dontwarn org.bouncycastle.mail.smime.SMIMECompressedParser
+-dontwarn org.bouncycastle.mail.smime.SMIMEEnveloped
+-dontwarn org.bouncycastle.mail.smime.SMIMEEnvelopedGenerator
+-dontwarn org.bouncycastle.mail.smime.SMIMEEnvelopedGenerator$1
+-dontwarn org.bouncycastle.mail.smime.SMIMEEnvelopedGenerator$ContentEncryptor
+-dontwarn org.bouncycastle.mail.smime.SMIMEEnvelopedParser
+-dontwarn org.bouncycastle.mail.smime.SMIMEGenerator
+-dontwarn org.bouncycastle.mail.smime.SMIMESigned
+-dontwarn org.bouncycastle.mail.smime.SMIMESigned$1
+-dontwarn org.bouncycastle.mail.smime.SMIMESignedGenerator
+-dontwarn org.bouncycastle.mail.smime.SMIMESignedGenerator$1
+-dontwarn org.bouncycastle.mail.smime.SMIMESignedGenerator$ContentSigner
+-dontwarn org.bouncycastle.mail.smime.SMIMESignedParser
+-dontwarn org.bouncycastle.mail.smime.SMIMESignedParser$1
+-dontwarn org.bouncycastle.mail.smime.SMIMEToolkit
+-dontwarn org.bouncycastle.mail.smime.SMIMEUtil
+-dontwarn org.bouncycastle.mail.smime.SMIMEUtil$LineOutputStream
+-dontwarn org.bouncycastle.mail.smime.SMIMEUtil$WriteOnceFileBackedMimeBodyPart
+-dontwarn org.bouncycastle.mail.smime.util.FileBackedMimeBodyPart
+-dontwarn org.bouncycastle.mail.smime.util.SharedFileInputStream
+-dontwarn org.bouncycastle.mail.smime.validator.SignedMailValidator
+-dontwarn org.bouncycastle.x509.util.LDAPStoreHelper

app/src/main/AndroidManifest.xml

@@ -2,9 +2,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="net.syncthing.lite">
 
     <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
     <application
+        android:name=".android.Application"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
@@ -18,17 +18,25 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".activities.IntroActivity"
+            android:theme="@style/Theme.Syncthing.NoActionBar"/>
         <activity android:name=".activities.FolderBrowserActivity"
             android:parentActivityName=".activities.MainActivity"/>
-        <activity
-            android:name=".activities.MIVFilePickerActivity"
-            android:label="@string/app_name"
-            android:theme="@style/FilePickerTheme">
+        <provider
+            android:name=".library.CacheFileProvider"
+            android:authorities="net.syncthing.lite.fileprovider"
+            android:grantUriPermissions="true"
+            android:exported="false" />
+        <provider
+            android:name=".library.SyncthingProvider"
+            android:authorities="net.syncthing.lite.documents"
+            android:grantUriPermissions="true"
+            android:exported="true"
+            android:permission="android.permission.MANAGE_DOCUMENTS">
             <intent-filter>
-                <action android:name="android.intent.action.GET_CONTENT" />
-                <category android:name="android.intent.category.DEFAULT" />
+                <action android:name="android.content.action.DOCUMENTS_PROVIDER" />
             </intent-filter>
-        </activity>
+        </provider>
     </application>
 
-</manifest>
+</manifest>

app/src/main/kotlin/net/syncthing/lite/activities/FolderBrowserActivity.kt

@@ -1,221 +1,163 @@
 package net.syncthing.lite.activities
 
-import android.Manifest
 import android.app.Activity
-import android.app.AlertDialog
 import android.content.Intent
-import android.content.pm.PackageManager
 import android.databinding.DataBindingUtil
-import android.os.AsyncTask
 import android.os.Bundle
-import android.os.Environment
-import android.support.v4.app.ActivityCompat
-import android.support.v4.content.ContextCompat
-import android.util.Log
-import android.view.View
-import android.widget.Toast
-import com.google.common.base.Objects.equal
-import com.google.common.base.Preconditions.checkArgument
-import com.nononsenseapps.filepicker.FilePickerActivity
-import net.syncthing.java.bep.IndexBrowser
+import kotlinx.coroutines.*
+import kotlinx.coroutines.channels.ConflatedBroadcastChannel
+import kotlinx.coroutines.channels.consumeEach
+import net.syncthing.java.bep.index.browser.DirectoryContentListing
+import net.syncthing.java.bep.index.browser.DirectoryListing
+import net.syncthing.java.bep.index.browser.DirectoryNotFoundListing
+import net.syncthing.java.bep.index.browser.IndexBrowser
 import net.syncthing.java.core.beans.FileInfo
-import net.syncthing.java.core.beans.FolderInfo
-import net.syncthing.java.core.utils.FileInfoOrdering
 import net.syncthing.java.core.utils.PathUtils
 import net.syncthing.lite.R
 import net.syncthing.lite.adapters.FolderContentsAdapter
+import net.syncthing.lite.adapters.FolderContentsListener
 import net.syncthing.lite.databinding.ActivityFolderBrowserBinding
-import net.syncthing.lite.databinding.DialogLoadingBinding
-import net.syncthing.lite.utils.DownloadFileTask
-import net.syncthing.lite.utils.UploadFileTask
+import net.syncthing.lite.dialogs.FileMenuDialogFragment
+import net.syncthing.lite.dialogs.FileUploadDialog
+import net.syncthing.lite.dialogs.ReconnectIssueDialogFragment
+import net.syncthing.lite.dialogs.downloadfile.DownloadFileDialogFragment
 
 class FolderBrowserActivity : SyncthingActivity() {
 
     companion object {
-
-        private val TAG = "FolderBrowserActivity"
-        private val REQUEST_WRITE_STORAGE = 142
-
-        val EXTRA_FOLDER_NAME = "folder_name"
+        private const val REQUEST_SELECT_UPLOAD_FILE = 171
+        private const val STATUS_PATH = "path"
+        const val EXTRA_FOLDER_NAME = "folder_name"
     }
 
-    private lateinit var binding: ActivityFolderBrowserBinding
-    private var indexBrowser: IndexBrowser? = null
-    private var loadingDialog: AlertDialog? = null
-    private var adapter: FolderContentsAdapter? = null
-    private var runWhenPermissionsReceived: Runnable? = null
+    private lateinit var folder: String
+
+    private val path = ConflatedBroadcastChannel<String>()
+    private val listing = ConflatedBroadcastChannel<DirectoryListing?>(null)
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        binding = DataBindingUtil.setContentView(this, R.layout.activity_folder_browser)
-        binding.mainListViewUploadHereButton.setOnClickListener { showUploadHereDialog() }
-        showFolderListView(intent.getStringExtra(EXTRA_FOLDER_NAME), null)
+
+        val binding: ActivityFolderBrowserBinding = DataBindingUtil.setContentView(this, R.layout.activity_folder_browser)
+        val adapter = FolderContentsAdapter()
+
+        binding.listView.adapter = adapter
+        binding.mainListViewUploadHereButton.setOnClickListener {
+            startActivityForResult(
+                    Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
+                        addCategory(Intent.CATEGORY_OPENABLE)
+                        type = "*/*"
+                    },
+                    REQUEST_SELECT_UPLOAD_FILE
+            )
+        }
+        adapter.listener = object: FolderContentsListener {
+            override fun onItemClicked(fileInfo: FileInfo) {
+                if (fileInfo.isDirectory()) {
+                    path.offer(fileInfo.path)
+                } else {
+                    DownloadFileDialogFragment.newInstance(fileInfo).show(supportFragmentManager)
+                }
+            }
+
+            override fun onItemLongClicked(fileInfo: FileInfo): Boolean {
+                return if (fileInfo.type == FileInfo.FileType.FILE) {
+                    FileMenuDialogFragment.newInstance(fileInfo).show(supportFragmentManager)
+
+                    true
+                } else {
+                    false
+                }
+            }
+        }
+
+        ReconnectIssueDialogFragment.showIfNeeded(this)
+
+        folder = intent.getStringExtra(EXTRA_FOLDER_NAME)
+        path.offer(if (savedInstanceState == null) IndexBrowser.ROOT_PATH else savedInstanceState.getString(STATUS_PATH))
+
+        launch {
+            var job = Job()
+
+            path.consumeEach { path ->
+                job.cancel()
+                job = Job()
+
+                binding.listView.scrollToPosition(0)
+
+                listing.send(null)
+
+                async(job) {
+                    libraryHandler.libraryManager.streamDirectoryListing(folder, path).consumeEach {
+                        listing.send(it)
+                    }
+                }
+            }
+        }
+
+        launch {
+            listing.openSubscription().consumeEach { listing ->
+                if (listing == null) {
+                    binding.isLoading = true
+                } else {
+                    supportActionBar?.title = if (PathUtils.isRoot(listing.path)) folder else PathUtils.getFileName(listing.path)
+                    binding.isLoading = false
+                    adapter.data = if (listing is DirectoryContentListing)
+                        listing.entries.sortedWith(IndexBrowser.sortAlphabeticallyDirectoriesFirst)
+                    else
+                        emptyList()
+                }
+            }
+        }
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        Thread {
-            indexBrowser?.close()
-            indexBrowser = null
-        }.start()
-        cancelLoadingDialog()
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+
+        outState.putString(STATUS_PATH, path.value)
+    }
+
+    private fun goUp(): Boolean {
+        val currentListing = listing.value
+
+        val parentPath = when (currentListing) {
+            is DirectoryContentListing -> currentListing.parentEntry?.path
+            is DirectoryNotFoundListing -> currentListing.theoreticalParentPath
+            else -> null
+        }
+
+        return if (parentPath == null) {
+            false
+        } else {
+            path.offer(parentPath)
+
+            true
+        }
     }
 
     override fun onBackPressed() {
-        val listView = binding.mainFolderAndFilesListView
-        //click item '0', ie '..' (go to parent)
-        listView.performItemClick(adapter!!.getView(0, null, listView), 0, listView.getItemIdAtPosition(0))
-    }
-
-    override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent) {
-        if (resultCode == Activity.RESULT_OK) {
-            UploadFileTask(this, syncthingClient(), intent.data, indexBrowser!!.folder,
-                    indexBrowser!!.currentPath, { this.updateFolderListView() }).uploadFile()
+        if (!goUp()) {
+            super.onBackPressed()
         }
     }
 
-    private fun showLoadingDialog(message: String) {
-        val binding = DataBindingUtil.inflate<DialogLoadingBinding>(
-                layoutInflater, R.layout.dialog_loading, null, false)
-        binding.loadingText.text = message
-        loadingDialog = android.app.AlertDialog.Builder(this)
-                .setCancelable(false)
-                .setView(binding.root)
-                .show()
-    }
-
-    private fun cancelLoadingDialog() {
-        loadingDialog?.cancel()
-        loadingDialog = null
-    }
-
-    private fun showFolderListView(folder: String, previousPath: String?) {
-        if (indexBrowser != null && equal(folder, indexBrowser!!.folder)) {
-            Log.d(TAG, "reuse current index browser")
-            indexBrowser!!.navigateToNearestPath(previousPath)
-        } else {
-            if (indexBrowser != null) {
-                indexBrowser!!.close()
-            }
-            Log.d(TAG, "open new index browser")
-            indexBrowser = syncthingClient().indexHandler
-                    .newIndexBrowserBuilder()
-                    .setOrdering(FileInfoOrdering.ALPHA_ASC_DIR_FIRST)
-                    .includeParentInList(true).allowParentInRoot(true)
-                    .setFolder(folder)
-                    .buildToNearestPath(previousPath)
-        }
-        adapter = FolderContentsAdapter(this)
-        binding.mainFolderAndFilesListView.adapter = adapter
-        binding.mainFolderAndFilesListView.setOnItemClickListener { _, _, position, _ ->
-            val fileInfo = binding.mainFolderAndFilesListView.getItemAtPosition(position) as FileInfo
-            Log.d(TAG, "navigate to path = '" + fileInfo.path + "' from path = '" + indexBrowser!!.currentPath + "'")
-            navigateToFolder(fileInfo)
-        }
-        navigateToFolder(indexBrowser!!.currentPathInfo)
-    }
-
-    private fun navigateToFolder(fileInfo: FileInfo) {
-        if (indexBrowser!!.isRoot && PathUtils.isParent(fileInfo.path)) {
-            finish()
-        } else {
-            if (fileInfo.isDirectory) {
-                indexBrowser!!.navigateTo(fileInfo)
-                val newFileInfo = if (PathUtils.isParent(fileInfo.path)) indexBrowser!!.currentPathInfo else fileInfo
-                if (!indexBrowser!!.isCacheReadyAfterALittleWait) {
-                    Log.d(TAG, "load folder cache bg")
-                    object : AsyncTask<Void?, Void?, Void?>() {
-                        override fun onPreExecute() {
-                            // TODO: show ProgressBar in ListView instead of dialog
-                            showLoadingDialog("open directory: " +
-                                    if (indexBrowser!!.isRoot) folderBrowser().getFolderInfo(indexBrowser!!.folder).label
-                                    else indexBrowser!!.currentPathFileName)
-                        }
-
-                        override fun doInBackground(vararg voids: Void?): Void? {
-                            indexBrowser!!.waitForCacheReady()
-                            return null
-                        }
-
-                        override fun onPostExecute(aVoid: Void?) {
-                            Log.d(TAG, "cache ready, navigate to folder")
-                            cancelLoadingDialog()
-                            navigateToFolder(newFileInfo)
-                        }
-                    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR)
-                } else {
-                    val list = indexBrowser!!.listFiles()
-                    Log.i("navigateToFolder", "list for path = '" + indexBrowser!!.currentPath + "' list = " + list.size + " records")
-                    Log.d("navigateToFolder", "list for path = '" + indexBrowser!!.currentPath + "' list = " + list)
-                    checkArgument(!list.isEmpty())//list must contain at least the 'parent' path
-                    adapter!!.clear()
-                    adapter!!.addAll(list)
-                    adapter!!.notifyDataSetChanged()
-                    binding.mainFolderAndFilesListView.setSelection(0)
-                    supportActionBar!!.setTitle(if (indexBrowser!!.isRoot)
-                        folderBrowser().getFolderInfo(indexBrowser!!.folder).label
-                    else
-                        newFileInfo.fileName)
+    override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
+        if (requestCode == REQUEST_SELECT_UPLOAD_FILE && resultCode == Activity.RESULT_OK) {
+            libraryHandler.syncthingClient { syncthingClient ->
+                GlobalScope.launch (Dispatchers.Main) {
+                    // FIXME: it would be better if the dialog would use the library handler
+                    FileUploadDialog(
+                            this@FolderBrowserActivity,
+                            syncthingClient,
+                            intent!!.data,
+                            folder,
+                            path.value,
+                            { /* nothing to do on success */ }
+                    ).show()
                 }
-            } else {
-                Log.i(TAG, "pulling file = " + fileInfo)
-                executeWithPermissions(
-                        Runnable { DownloadFileTask(this, syncthingClient(), fileInfo).downloadFile() })
             }
-        }
-    }
-
-    private fun updateFolderListView() {
-        showFolderListView(indexBrowser!!.folder, indexBrowser!!.currentPath)
-    }
-
-    private fun showUploadHereDialog() {
-        executeWithPermissions(Runnable {
-            val i = Intent(this, MIVFilePickerActivity::class.java)
-            val path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).absolutePath
-            Log.i(TAG, "showUploadHereDialog path = " + path)
-            i.putExtra(FilePickerActivity.EXTRA_START_PATH, path)
-            startActivityForResult(i, 0)
-        })
-    }
-
-    override fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {
-        binding.mainIndexProgressBarLabel.text = ("index update, folder "
-                + folder.label + " " + percentage + "% synchronized")
-        updateFolderListView()
-    }
-
-    override fun onIndexUpdateComplete() {
-        binding.mainIndexProgressBar.visibility = View.GONE
-        updateFolderListView()
-    }
-
-    private fun executeWithPermissions(runnable: Runnable) {
-        val permissionState = ContextCompat.checkSelfPermission(this,
-                Manifest.permission.WRITE_EXTERNAL_STORAGE)
-        if (permissionState != PackageManager.PERMISSION_GRANTED) {
-            ActivityCompat.requestPermissions(this,
-                    arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
-                    REQUEST_WRITE_STORAGE)
-            runWhenPermissionsReceived = runnable
         } else {
-            runnable.run()
-        }
-    }
-
-    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>,
-                                            grantResults: IntArray) {
-        when (requestCode) {
-            REQUEST_WRITE_STORAGE -> {
-                if (grantResults.isEmpty() || grantResults[0] != PackageManager.PERMISSION_GRANTED) {
-                    Toast.makeText(this, R.string.toast_write_storage_permission_required,
-                            Toast.LENGTH_LONG).show()
-                } else {
-                    runWhenPermissionsReceived!!.run()
-                }
-                runWhenPermissionsReceived = null
-            }
-            else -> super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+            super.onActivityResult(requestCode, resultCode, intent)
         }
     }
 }

app/src/main/kotlin/net/syncthing/lite/activities/IntroActivity.kt

@@ -0,0 +1,207 @@
+package net.syncthing.lite.activities
+
+import android.arch.lifecycle.Observer
+import android.content.Intent
+import android.databinding.DataBindingUtil
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.support.v4.content.ContextCompat
+import android.text.Html
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import com.github.paolorotolo.appintro.AppIntro
+import com.google.zxing.integration.android.IntentIntegrator
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import net.syncthing.java.core.beans.DeviceId
+import net.syncthing.lite.R
+import net.syncthing.lite.databinding.FragmentIntroOneBinding
+import net.syncthing.lite.databinding.FragmentIntroThreeBinding
+import net.syncthing.lite.databinding.FragmentIntroTwoBinding
+import net.syncthing.lite.fragments.SyncthingFragment
+import net.syncthing.lite.utils.FragmentIntentIntegrator
+import net.syncthing.lite.utils.Util
+import org.jetbrains.anko.defaultSharedPreferences
+import org.jetbrains.anko.intentFor
+import java.io.IOException
+
+/**
+ * Shown when a user first starts the app. Shows some info and helps the user to add their first
+ * device and folder.
+ */
+class IntroActivity : AppIntro() {
+
+    /**
+     * Initialize fragments and library parameters.
+     */
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // Disable continue button on second slide until a valid device ID is entered.
+        nextButton.setOnClickListener {
+            val fragment = fragments[pager.currentItem]
+            if (fragment !is IntroFragmentTwo || fragment.isDeviceIdValid()) {
+                pager.goToNextSlide()
+            }
+        }
+
+        addSlide(IntroFragmentOne())
+        addSlide(IntroFragmentTwo())
+        addSlide(IntroFragmentThree())
+
+        setSeparatorColor(ContextCompat.getColor(this, android.R.color.primary_text_dark))
+        showSkipButton(true)
+        isProgressButtonEnabled = true
+        pager.isPagingEnabled = false
+    }
+
+    override fun onSkipPressed(currentFragment: Fragment) {
+        onDonePressed(currentFragment)
+    }
+
+    override fun onDonePressed(currentFragment: Fragment) {
+        defaultSharedPreferences.edit().putBoolean(MainActivity.PREF_IS_FIRST_START, false).apply()
+        startActivity(intentFor<MainActivity>())
+        finish()
+    }
+
+    /**
+     * Display some simple welcome text.
+     */
+    class IntroFragmentOne : SyncthingFragment() {
+
+        override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+            val binding = FragmentIntroOneBinding.inflate(inflater, container, false)
+
+            libraryHandler.isListeningPortTaken.observe(this, Observer { binding.listeningPortTaken = it })
+
+            return binding.root
+        }
+
+        override fun onLibraryLoaded() {
+            super.onLibraryLoaded()
+
+            libraryHandler.configuration { config ->
+                config.localDeviceName = Util.getDeviceName()
+                config.persistLater()
+            }
+        }
+    }
+
+    /**
+     * Display device ID entry field and QR scanner option.
+     */
+    class IntroFragmentTwo : SyncthingFragment() {
+
+        private lateinit var binding: FragmentIntroTwoBinding
+
+        override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+            binding = DataBindingUtil.inflate(inflater, R.layout.fragment_intro_two, container, false)
+            binding.enterDeviceId.scanQrCode.setOnClickListener {
+                FragmentIntentIntegrator(this@IntroFragmentTwo).initiateScan()
+            }
+            binding.enterDeviceId.scanQrCode.setImageResource(R.drawable.ic_qr_code_white_24dp)
+            return binding.root
+        }
+
+        override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
+            val scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent)
+            if (scanResult?.contents != null && scanResult.contents.isNotBlank()) {
+                binding.enterDeviceId.deviceId.setText(scanResult.contents)
+                binding.enterDeviceId.deviceIdHolder.isErrorEnabled = false
+            }
+        }
+
+        /**
+         * Checks if the entered device ID is valid. If yes, imports it and returns true. If not,
+         * sets an error on the textview and returns false.
+         */
+        fun isDeviceIdValid(): Boolean {
+            return try {
+                val deviceId = binding.enterDeviceId.deviceId.text.toString()
+                Util.importDeviceId(libraryHandler, context, deviceId, { })
+                true
+            } catch (e: IOException) {
+                binding.enterDeviceId.deviceId.error = getString(R.string.invalid_device_id)
+                false
+            }
+        }
+
+        private val addedDeviceIds = HashSet<DeviceId>()
+
+        override fun onResume() {
+            super.onResume()
+
+            binding.foundDevices.removeAllViews()
+            addedDeviceIds.clear()
+
+            libraryHandler.registerMessageFromUnknownDeviceListener(onDeviceFound)
+        }
+
+        override fun onPause() {
+            super.onPause()
+
+            libraryHandler.unregisterMessageFromUnknownDeviceListener(onDeviceFound)
+        }
+
+        private val onDeviceFound: (DeviceId) -> Unit = {
+            deviceId ->
+
+                if (addedDeviceIds.add(deviceId)) {
+                    binding.foundDevices.addView(
+                            Button(context).apply {
+                                layoutParams = ViewGroup.LayoutParams(
+                                        ViewGroup.LayoutParams.MATCH_PARENT,
+                                        ViewGroup.LayoutParams.WRAP_CONTENT
+                                )
+                                text = deviceId.deviceId
+
+                                setOnClickListener {
+                                    binding.enterDeviceId.deviceId.setText(deviceId.deviceId)
+                                    binding.enterDeviceId.deviceIdHolder.isErrorEnabled = false
+
+                                    binding.scroll.scrollTo(0, 0)
+                                }
+                            }
+                    )
+                }
+        }
+    }
+
+    /**
+     * Waits until remote device connects with new folder.
+     */
+    class IntroFragmentThree : SyncthingFragment() {
+
+        private lateinit var binding: FragmentIntroThreeBinding
+
+        override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+            binding = DataBindingUtil.inflate(inflater, R.layout.fragment_intro_three, container, false)
+
+            libraryHandler.library { config, client, _ ->
+                GlobalScope.launch (Dispatchers.Main) {
+                    client.addOnConnectionChangedListener(this@IntroFragmentThree::onConnectionChanged)
+                    val deviceId = config.localDeviceId.deviceId
+                    val desc = activity?.getString(R.string.intro_page_three_description, "<b>$deviceId</b>")
+                    binding.description.text = Html.fromHtml(desc)
+                }
+            }
+
+            return binding.root
+        }
+
+        private fun onConnectionChanged(deviceId: DeviceId) {
+            libraryHandler.library { config, client, _ ->
+                GlobalScope.launch (Dispatchers.Main) {
+                    if (config.folders.isNotEmpty()) {
+                        client.removeOnConnectionChangedListener(this@IntroFragmentThree::onConnectionChanged)
+                        (activity as IntroActivity?)?.onDonePressed(this@IntroFragmentThree)
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/kotlin/net/syncthing/lite/activities/MIVFilePickerActivity.kt

@@ -1,19 +0,0 @@
-package net.syncthing.lite.activities
-
-import com.nononsenseapps.filepicker.AbstractFilePickerActivity
-import com.nononsenseapps.filepicker.AbstractFilePickerFragment
-
-import net.syncthing.lite.fragments.MIVFilePickerFragment
-
-import java.io.File
-
-class MIVFilePickerActivity : AbstractFilePickerActivity<File>() {
-
-    override fun getFragment(startPath: String, mode: Int, allowMultiple: Boolean,
-            allowCreateDir: Boolean): AbstractFilePickerFragment<File> {
-        // Only the fragment in this line needs to be changed
-        val fragment = MIVFilePickerFragment()
-        fragment.setArgs(startPath, mode, allowMultiple, allowCreateDir)
-        return fragment
-    }
-}

app/src/main/kotlin/net/syncthing/lite/activities/MainActivity.kt

@@ -8,22 +8,35 @@ import android.support.v4.app.Fragment
 import android.support.v7.app.ActionBarDrawerToggle
 import android.view.Gravity
 import android.view.MenuItem
-import android.view.View
-import net.syncthing.java.core.beans.FolderInfo
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import net.syncthing.lite.R
 import net.syncthing.lite.databinding.ActivityMainBinding
+import net.syncthing.lite.dialogs.DeviceIdDialogFragment
 import net.syncthing.lite.fragments.DevicesFragment
 import net.syncthing.lite.fragments.FoldersFragment
-import net.syncthing.lite.utils.UpdateIndexTask
+import net.syncthing.lite.fragments.SettingsFragment
+import org.jetbrains.anko.defaultSharedPreferences
+import org.jetbrains.anko.intentFor
 
 class MainActivity : SyncthingActivity() {
 
+    companion object {
+        const val PREF_IS_FIRST_START = "net.syncthing.lite.activities.MainActivity.IS_FIRST_START"
+    }
+
     private lateinit var binding: ActivityMainBinding
     private var drawerToggle: ActionBarDrawerToggle? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        if (defaultSharedPreferences.getBoolean(PREF_IS_FIRST_START, true)) {
+            startActivity(intentFor<IntroActivity>())
+            finish()
+        }
+
         binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
 
         drawerToggle = ActionBarDrawerToggle(
@@ -34,15 +47,19 @@ class MainActivity : SyncthingActivity() {
         supportActionBar!!.setDisplayHomeAsUpEnabled(true)
     }
 
+    /**
+     * Sync the toggle state and fragment after onRestoreInstanceState has occurred.
+     */
     override fun onPostCreate(savedInstanceState: Bundle?) {
         super.onPostCreate(savedInstanceState)
-        // Sync the toggle state after onRestoreInstanceState has occurred.
-        drawerToggle!!.syncState()
-    }
 
-    override fun onLibraryLoaded() {
-        super.onLibraryLoaded()
-        setContentFragment(FoldersFragment())
+        drawerToggle!!.syncState()
+        val menu = binding.navigation.menu
+        val selection = (0 until menu.size())
+                .map { menu.getItem(it) }
+                .find { it.isChecked }
+                ?: menu.getItem(0)
+        onNavigationItemSelectedListener(selection)
     }
 
     override fun onConfigurationChanged(newConfig: Configuration) {
@@ -57,17 +74,17 @@ class MainActivity : SyncthingActivity() {
             true
         } else super.onOptionsItemSelected(item)
         // Handle your other action bar items...
-
     }
 
     private fun onNavigationItemSelectedListener(menuItem: MenuItem): Boolean {
         when (menuItem.itemId) {
             R.id.folders -> setContentFragment(FoldersFragment())
             R.id.devices -> setContentFragment(DevicesFragment())
-            R.id.update_index -> UpdateIndexTask(this, syncthingClient()).updateIndex()
+            R.id.settings -> setContentFragment(SettingsFragment())
+            R.id.device_id -> DeviceIdDialogFragment().show(supportFragmentManager)
             R.id.clear_index -> AlertDialog.Builder(this)
-                    .setTitle("clear cache and index")
-                    .setMessage("clear all cache data and index data?")
+                    .setTitle(getString(R.string.clear_cache_and_index_title))
+                    .setMessage(getString(R.string.clear_cache_and_index_body))
                     .setIcon(android.R.drawable.ic_dialog_alert)
                     .setPositiveButton(android.R.string.yes) { _, _ -> cleanCacheAndIndex() }
                     .setNegativeButton(android.R.string.no, null)
@@ -85,17 +102,9 @@ class MainActivity : SyncthingActivity() {
     }
 
     private fun cleanCacheAndIndex() {
-        syncthingClient().clearCacheAndIndex()
-        recreate()
-    }
-
-    override fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {
-        binding.mainIndexProgressBar.visibility = View.VISIBLE
-        binding.mainIndexProgressBarLabel.text = ("index update, folder "
-                + folder.label + " " + percentage + "% synchronized")
-    }
-
-    override fun onIndexUpdateComplete() {
-        binding.mainIndexProgressBar.visibility = View.GONE
+        GlobalScope.launch (Dispatchers.Main) {
+            libraryHandler.syncthingClient { it.clearCacheAndIndex() }
+            recreate()
+        }
     }
 }

app/src/main/kotlin/net/syncthing/lite/activities/SyncthingActivity.kt

@@ -1,111 +1,60 @@
 package net.syncthing.lite.activities
 
 import android.app.AlertDialog
-import android.content.Context
 import android.databinding.DataBindingUtil
-import android.os.AsyncTask
 import android.os.Bundle
-import android.preference.PreferenceManager
-import android.support.v7.app.AppCompatActivity
-import android.util.Log
+import android.support.design.widget.Snackbar
 import android.view.LayoutInflater
-import net.syncthing.java.bep.FolderBrowser
-import net.syncthing.java.client.SyncthingClient
-import net.syncthing.java.core.beans.FolderInfo
-import net.syncthing.java.core.configuration.ConfigurationService
 import net.syncthing.lite.BuildConfig
 import net.syncthing.lite.R
+import net.syncthing.lite.async.CoroutineActivity
 import net.syncthing.lite.databinding.DialogLoadingBinding
-import net.syncthing.lite.utils.LibraryHandler
-import net.syncthing.lite.utils.UpdateIndexTask
+import net.syncthing.lite.library.LibraryHandler
 import org.slf4j.impl.HandroidLoggerAdapter
-import java.util.*
 
-abstract class SyncthingActivity : AppCompatActivity() {
-
-    companion object {
-        private val TAG = "SyncthingActivity"
-
-        private var activityCount = 0
-        private var libraryHandler: LibraryHandler? = null
+abstract class SyncthingActivity : CoroutineActivity() {
+    val libraryHandler: LibraryHandler by lazy {
+        LibraryHandler(
+                context = this@SyncthingActivity
+        )
     }
-
-    fun syncthingClient(): SyncthingClient = libraryHandler!!.syncthingClient!!
-
-    fun configuration(): ConfigurationService = libraryHandler!!.configuration!!
-
-    fun folderBrowser(): FolderBrowser = libraryHandler!!.folderBrowser!!
+    private var loadingDialog: AlertDialog? = null
+    private var snackBar: Snackbar? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         HandroidLoggerAdapter.DEBUG = BuildConfig.DEBUG
-        activityCount++
-        if (libraryHandler == null) {
-            InitTask(this, this::onLibraryLoaded).execute()
-        }
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        activityCount--
-        Thread {
-            if (activityCount == 0) {
-                libraryHandler!!.destroy()
-                libraryHandler = null
+    override fun onStart() {
+        super.onStart()
+
+        val binding = DataBindingUtil.inflate<DialogLoadingBinding>(
+                LayoutInflater.from(this), R.layout.dialog_loading, null, false)
+        binding.loadingText.text = getString(R.string.loading_config_starting_syncthing_client)
+
+        loadingDialog = AlertDialog.Builder(this)
+                .setCancelable(false)
+                .setView(binding.root)
+                .show()
+
+        libraryHandler.start {
+            if (!isDestroyed) {
+                loadingDialog?.dismiss()
             }
-        }.start()
-    }
 
-    private class InitTask(val context: Context, val onLibraryLoaded: () -> Unit)
-        : AsyncTask<Void?, Void?, Void?>() {
-
-        private var loadingDialog: AlertDialog? = null
-
-        override fun onPreExecute() {
-            val binding = DataBindingUtil.inflate<DialogLoadingBinding>(
-                    LayoutInflater.from(context), R.layout.dialog_loading, null, false)
-            binding.loadingText.text = "loading config, starting syncthing client"
-            loadingDialog = android.app.AlertDialog.Builder(context)
-                    .setCancelable(false)
-                    .setView(binding.root)
-                    .show()
-        }
-
-        override fun doInBackground(vararg voidd: Void?): Void? {
-            libraryHandler = LibraryHandler()
-            libraryHandler!!.init(context)
-            return null
-        }
-
-        override fun onPostExecute(voidd: Void?) {
-            loadingDialog!!.cancel()
-            libraryHandler!!.setOnIndexUpdatedListener(object : LibraryHandler.OnIndexUpdatedListener {
-                override fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {
-                    onIndexUpdateProgress(folder, percentage)
-                }
-
-                override fun onIndexUpdateComplete() {
-                    onIndexUpdateComplete()
-                }
-            })
-
-            val lastUpdateMillis = PreferenceManager.getDefaultSharedPreferences(context)
-                    .getLong(UpdateIndexTask.LAST_INDEX_UPDATE_TS_PREF, -1)
-            val lastUpdate =
-                    if (lastUpdateMillis < 0) null
-                    else                      Date(lastUpdateMillis)
-            //trigger update if last was more than 10mins ago
-            if (lastUpdate == null || Date().time - lastUpdate.time > 10 * 60 * 1000) {
-                Log.d(TAG, "trigger index update, last was " + lastUpdate!!)
-                UpdateIndexTask(context, libraryHandler!!.syncthingClient!!).updateIndex()
-            }
             onLibraryLoaded()
         }
     }
 
-    open fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {}
+    override fun onStop() {
+        super.onStop()
 
-    open fun onIndexUpdateComplete() {}
+        libraryHandler.stop()
+        loadingDialog?.dismiss()
+    }
 
-    open fun onLibraryLoaded() {}
+    open fun onLibraryLoaded() {
+        // nothing to do
+    }
 }

app/src/main/kotlin/net/syncthing/lite/adapters/DevicesAdapter.kt

@@ -1,35 +1,47 @@
 package net.syncthing.lite.adapters
 
-import android.content.Context
-import android.databinding.DataBindingUtil
+import android.support.v7.widget.RecyclerView
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
-import com.google.common.collect.Lists
-import net.syncthing.java.core.beans.DeviceStats
-import net.syncthing.lite.R
+import net.syncthing.java.core.beans.DeviceInfo
 import net.syncthing.lite.databinding.ListviewDeviceBinding
+import kotlin.properties.Delegates
 
-class DevicesAdapter(context: Context) :
-        ArrayAdapter<DeviceStats>(context, R.layout.listview_device, Lists.newArrayList()) {
+class DevicesAdapter: RecyclerView.Adapter<DeviceViewHolder>() {
+    var data: List<DeviceInfo> by Delegates.observable(listOf()) {
+        _, _, _ -> notifyDataSetChanged()
+    }
 
-    override fun getView(position: Int, v: View?, parent: ViewGroup): View {
-        val binding: ListviewDeviceBinding
-            = if (v == null) {
-                DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.listview_device, parent, false)
-            } else {
-                DataBindingUtil.bind(v)
-            }
-        val deviceStats = getItem(position)
-        binding.deviceName.text = deviceStats!!.name
-        val icon =
-            when (deviceStats.status) {
-                DeviceStats.DeviceStatus.OFFLINE -> R.drawable.ic_laptop_red_24dp
-                DeviceStats.DeviceStatus.ONLINE_INACTIVE,
-                DeviceStats.DeviceStatus.ONLINE_ACTIVE -> R.drawable.ic_laptop_green_24dp
-            }
-        binding.deviceIcon.setImageResource(icon)
-        return binding.root
+    var listener: DeviceAdapterListener? = null
+
+    init {
+        setHasStableIds(true)
+    }
+
+    override fun getItemCount() = data.size
+    override fun getItemId(position: Int) = data[position].deviceId.deviceId.hashCode().toLong()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = DeviceViewHolder(
+            ListviewDeviceBinding.inflate(
+                    LayoutInflater.from(parent.context), parent, false
+            )
+    )
+
+    override fun onBindViewHolder(holder: DeviceViewHolder, position: Int) {
+        val deviceStats = data[position]
+        val binding = holder.binding
+
+        binding.name = deviceStats.name
+        binding.isConnected = deviceStats.isConnected
+
+        binding.root.setOnLongClickListener { listener?.onDeviceLongClicked(deviceStats) ?: false }
+
+        binding.executePendingBindings()
     }
 }
+
+interface DeviceAdapterListener {
+    fun onDeviceLongClicked(deviceInfo: DeviceInfo): Boolean
+}
+
+class DeviceViewHolder(val binding: ListviewDeviceBinding): RecyclerView.ViewHolder(binding.root)

app/src/main/kotlin/net/syncthing/lite/adapters/FolderContentsAdapter.kt

@@ -1,40 +1,69 @@
 package net.syncthing.lite.adapters
 
-import android.content.Context
-import android.databinding.DataBindingUtil
+import android.support.v7.widget.RecyclerView
 import android.text.format.DateUtils
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
-import com.google.common.collect.Lists
 import net.syncthing.java.core.beans.FileInfo
 import net.syncthing.lite.R
 import net.syncthing.lite.databinding.ListviewFileBinding
 import org.apache.commons.io.FileUtils
+import kotlin.properties.Delegates
 
-class FolderContentsAdapter(context: Context) :
-        ArrayAdapter<FileInfo>(context, R.layout.listview_file, Lists.newArrayList()) {
+// TODO: enable setHasStableIds and add a good way to get an id
+class FolderContentsAdapter: RecyclerView.Adapter<FolderContentsViewHolder>() {
+    var data: List<FileInfo> by Delegates.observable(listOf()) {
+        _, _, _ -> notifyDataSetChanged()
+    }
 
-    override fun getView(position: Int, v: View?, parent: ViewGroup): View {
-        val binding: ListviewFileBinding =
-            if (v == null) {
-                DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.listview_file, parent, false)
-            } else {
-                DataBindingUtil.bind(v)
-            }
-        val fileInfo = getItem(position)
-        binding.fileLabel.text = fileInfo!!.fileName
-        if (fileInfo.isDirectory) {
+    var listener: FolderContentsListener? = null
+
+    init {
+        // setHasStableIds(true)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = FolderContentsViewHolder(
+            ListviewFileBinding.inflate(
+                    LayoutInflater.from(parent.context),
+                    parent,
+                    false
+            )
+    )
+
+    override fun onBindViewHolder(holder: FolderContentsViewHolder, position: Int) {
+        val binding = holder.binding
+        val fileInfo = data[position]
+
+        binding.fileName = fileInfo.fileName
+
+        if (fileInfo.isDirectory()) {
             binding.fileIcon.setImageResource(R.drawable.ic_folder_black_24dp)
-            binding.fileSize.visibility = View.GONE
+            binding.fileSize = null
         } else {
             binding.fileIcon.setImageResource(R.drawable.ic_image_black_24dp)
-            binding.fileSize.visibility = View.VISIBLE
-            binding.fileSize.text = (FileUtils.byteCountToDisplaySize(fileInfo.size!!)
-                    + " - last modified "
-                    + DateUtils.getRelativeDateTimeString(context, fileInfo.lastModified.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0))
+            binding.fileSize = binding.root.context.getString(R.string.file_info,
+                    FileUtils.byteCountToDisplaySize(fileInfo.size!!),
+                    DateUtils.getRelativeDateTimeString(binding.root.context, fileInfo.lastModified.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0))
         }
-        return binding.root
+
+        binding.root.setOnClickListener {
+            listener?.onItemClicked(fileInfo)
+        }
+
+        binding.root.setOnLongClickListener {
+            listener?.onItemLongClicked(fileInfo) ?: false
+        }
+
+        binding.executePendingBindings()
     }
+
+    override fun getItemCount() = data.size
+    // override fun getItemId(position: Int) = data[position].fileName.hashCode().toLong()
 }
+
+interface FolderContentsListener {
+    fun onItemClicked(fileInfo: FileInfo)
+    fun onItemLongClicked(fileInfo: FileInfo): Boolean
+}
+
+class FolderContentsViewHolder(val binding: ListviewFileBinding): RecyclerView.ViewHolder(binding.root)

app/src/main/kotlin/net/syncthing/lite/adapters/FoldersListAdapter.kt

@@ -1,38 +1,65 @@
 package net.syncthing.lite.adapters
 
-import android.content.Context
-import android.databinding.DataBindingUtil
+import android.support.v7.widget.RecyclerView
 import android.text.format.DateUtils
+import android.util.Log
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
+import net.syncthing.java.bep.folder.FolderStatus
 import net.syncthing.java.core.beans.FolderInfo
 import net.syncthing.java.core.beans.FolderStats
 import net.syncthing.lite.R
 import net.syncthing.lite.databinding.ListviewFolderBinding
-import org.apache.commons.lang3.tuple.Pair
+import kotlin.properties.Delegates
 
-class FoldersListAdapter(context: Context, list: List<Pair<FolderInfo, FolderStats>>) :
-        ArrayAdapter<Pair<FolderInfo, FolderStats>>(context, R.layout.listview_folder, list) {
-
-    override fun getView(position: Int, v: View?, parent: ViewGroup): View {
-        val binding: ListviewFolderBinding =
-            if (v == null) {
-                DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.listview_folder, parent, false)
-            } else {
-                DataBindingUtil.bind(v)
-            }
-        val folderInfo = getItem(position)!!.left
-        val folderStats = getItem(position)!!.right
-        binding.folderName.text = "${folderInfo.label} (${folderInfo.folder})"
-        binding.folderLastmodInfo.text =
-                if (folderStats.lastUpdate == null)
-                    "last modified: unknown"
-                else "last modified: " +
-                        DateUtils.getRelativeDateTimeString(context, folderStats.lastUpdate.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0)
-        binding.folderContentInfo.text = "${folderStats.describeSize()}, ${folderStats.fileCount} files, ${folderStats.dirCount} dirs"
-        return binding.root
+class FoldersListAdapter: RecyclerView.Adapter<FolderListViewHolder>() {
+    var data: List<FolderStatus> by Delegates.observable(listOf()) {
+        _, _, _ -> notifyDataSetChanged()
     }
 
+    var listener: FolderListAdapterListener? = null
+
+    init {
+        setHasStableIds(true)
+    }
+
+    override fun getItemCount() = data.size
+    override fun getItemId(position: Int) = data[position].info.folderId.hashCode().toLong()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = FolderListViewHolder (
+            ListviewFolderBinding.inflate(
+                    LayoutInflater.from(parent.context), parent, false
+            )
+    )
+
+    override fun onBindViewHolder(holder: FolderListViewHolder, position: Int) {
+        val binding = holder.binding
+        val item = data[position]
+        val (folderInfo, folderStats) = item
+        val context = holder.itemView.context
+
+        Log.d("FolderListAdapter", "$item")
+
+        binding.folderName = context.getString(R.string.folder_label_format, folderInfo.label, folderInfo.folderId)
+
+        binding.lastModification = context.getString(R.string.last_modified_time,
+                DateUtils.getRelativeDateTimeString(context, folderStats.lastUpdate.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0))
+
+        binding.info = context.getString(R.string.folder_content_info, folderStats.sizeDescription, folderStats.fileCount, folderStats.dirCount)
+
+        binding.info2 = if (item.missingIndexUpdates == 0L)
+            null
+        else
+            context.getString(R.string.pending_index_updates, item.missingIndexUpdates)
+
+        binding.root.setOnClickListener {
+            listener?.onFolderClicked(folderInfo, folderStats)
+        }
+    }
+}
+
+class FolderListViewHolder(val binding: ListviewFolderBinding): RecyclerView.ViewHolder(binding.root)
+
+interface FolderListAdapterListener {
+    fun onFolderClicked(folderInfo: FolderInfo, folderStats: FolderStats)
 }

app/src/main/kotlin/net/syncthing/lite/android/Application.kt

@@ -0,0 +1,64 @@
+package net.syncthing.lite.android
+
+import android.app.Application
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import net.syncthing.lite.BuildConfig
+import org.jetbrains.anko.defaultSharedPreferences
+import java.io.PrintWriter
+import java.io.StringWriter
+
+class Application: Application() {
+    companion object {
+        private const val LOG_TAG = "Application"
+        private const val PREF_ENABLE_CRASH_HANDLER = "crash_handler"
+        private val handler = Handler(Looper.getMainLooper())
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+
+        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        val defaultHandler = Thread.getDefaultUncaughtExceptionHandler()
+        val mainThread = Thread.currentThread()
+
+        if (defaultHandler == null) {
+            Log.w(LOG_TAG, "could not get default crash handler")
+        }
+
+        fun handleCrash(ex: Throwable) {
+            Log.w(LOG_TAG, "app crashed", ex)
+
+            val enableCustomCrashHandling = defaultSharedPreferences.getBoolean(PREF_ENABLE_CRASH_HANDLER, false)
+
+            if (enableCustomCrashHandling) {
+                clipboard.primaryClip = ClipData.newPlainText(
+                        "stacktrace",
+                        StringWriter().apply {
+                            append("Version: ").append(BuildConfig.VERSION_NAME).append('\n')
+                            append(Log.getStackTraceString(ex)).append('\n')
+                            ex.printStackTrace(PrintWriter(this))
+                        }.buffer.toString()
+                )
+            }
+
+            if (defaultHandler != null) {
+                defaultHandler.uncaughtException(mainThread, ex)
+            } else {
+                System.exit(1)
+            }
+        }
+
+        Thread.setDefaultUncaughtExceptionHandler { thread, ex ->
+            if (Looper.getMainLooper() === Looper.myLooper()) {
+                handleCrash(ex)
+            } else {
+                handler.post { handleCrash(ex) }
+            }
+        }
+    }
+}

app/src/main/kotlin/net/syncthing/lite/async/CoroutineActivity.kt

@@ -0,0 +1,19 @@
+package net.syncthing.lite.async
+
+import android.support.v7.app.AppCompatActivity
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlin.coroutines.CoroutineContext
+
+abstract class CoroutineActivity: AppCompatActivity(), CoroutineScope {
+    val job = Job()
+
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    override fun onDestroy() {
+        super.onDestroy()
+        job.cancel()
+    }
+}

app/src/main/kotlin/net/syncthing/lite/async/CoroutineFragment.kt

@@ -0,0 +1,19 @@
+package net.syncthing.lite.async
+
+import android.support.v4.app.Fragment
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlin.coroutines.CoroutineContext
+
+abstract class CoroutineFragment: Fragment(), CoroutineScope {
+    val job = Job()
+
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    override fun onDestroy() {
+        super.onDestroy()
+        job.cancel()
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/DeviceIdDialogFragment.kt

@@ -0,0 +1,107 @@
+package net.syncthing.lite.dialogs
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.Color
+import android.os.Bundle
+import android.support.v4.app.FragmentManager
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.Toast
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.WriterException
+import com.google.zxing.qrcode.QRCodeWriter
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import net.syncthing.lite.R
+import net.syncthing.lite.databinding.DialogDeviceIdBinding
+import net.syncthing.lite.fragments.SyncthingDialogFragment
+import org.jetbrains.anko.doAsync
+
+class DeviceIdDialogFragment: SyncthingDialogFragment() {
+    companion object {
+        private const val QR_RESOLUTION = 512
+        private const val TAG = "DeviceIdDialog"
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val binding = DialogDeviceIdBinding.inflate(LayoutInflater.from(context), null, false)
+
+        // use an placeholder to prevent size changes; this string is never shown
+        binding.deviceId.text = "XXXXXXX-XXXXXXX-XXXXXXX-XXXXXXX-XXXXXXX-XXXXXXX-XXXXXXX-XXXXXXX"
+        binding.deviceId.visibility = View.INVISIBLE
+
+        binding.qrCode.setImageBitmap(Bitmap.createBitmap(QR_RESOLUTION, QR_RESOLUTION, Bitmap.Config.RGB_565))
+
+        libraryHandler.library { configuration, _, _ ->
+            val deviceId = configuration.localDeviceId
+
+            fun copyDeviceId() {
+                val clipboard = context!!.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+                val clip = ClipData.newPlainText(context!!.getString(R.string.device_id), deviceId.deviceId)
+
+                clipboard.primaryClip = clip
+
+                Toast.makeText(context, context!!.getString(R.string.device_id_copied), Toast.LENGTH_SHORT)
+                        .show()
+            }
+
+            fun shareDeviceId() {
+                context!!.startActivity(Intent.createChooser(
+                        Intent(Intent.ACTION_SEND).apply {
+                            type = "text/plain"
+                            putExtra(Intent.EXTRA_TEXT, deviceId.deviceId)
+                        },
+                        context!!.getString(R.string.share_device_id_chooser)
+                ))
+            }
+
+            GlobalScope.launch (Dispatchers.Main) {
+                binding.deviceId.text = deviceId.deviceId
+                binding.deviceId.visibility = View.VISIBLE
+
+                binding.deviceId.setOnClickListener { copyDeviceId() }
+                binding.share.setOnClickListener { shareDeviceId() }
+            }
+
+            doAsync {
+                val writer = QRCodeWriter()
+                try {
+                    val bitMatrix = writer.encode(deviceId.deviceId, BarcodeFormat.QR_CODE, QR_RESOLUTION, QR_RESOLUTION)
+                    val width = bitMatrix.width
+                    val height = bitMatrix.height
+                    val bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+                    for (x in 0 until width) {
+                        for (y in 0 until height) {
+                            bmp.setPixel(x, y, if (bitMatrix.get(x, y)) Color.BLACK else Color.WHITE)
+                        }
+                    }
+
+                    GlobalScope.launch (Dispatchers.Main) {
+                        binding.flipper.displayedChild = 1
+                        binding.qrCode.setImageBitmap(bmp)
+                    }
+                } catch (e: WriterException) {
+                    Log.w(TAG, e)
+                }
+            }
+        }
+
+        return AlertDialog.Builder(context!!, theme)
+                .setTitle(context!!.getString(R.string.device_id))
+                .setView(binding.root)
+                .setPositiveButton(android.R.string.ok, null)
+                .create()
+    }
+
+    fun show(manager: FragmentManager?) {
+        super.show(manager, TAG)
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/FileMenuDialogFragment.kt

@@ -0,0 +1,79 @@
+package net.syncthing.lite.dialogs
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.support.design.widget.BottomSheetDialogFragment
+import android.support.v4.app.FragmentManager
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.webkit.MimeTypeMap
+import net.syncthing.java.core.beans.FileInfo
+import net.syncthing.lite.databinding.DialogFileBinding
+import net.syncthing.lite.dialogs.downloadfile.DownloadFileDialogFragment
+import net.syncthing.lite.dialogs.downloadfile.DownloadFileSpec
+import org.apache.commons.io.FilenameUtils
+
+class FileMenuDialogFragment: BottomSheetDialogFragment() {
+    companion object {
+        private const val ARG_FILE_SPEC = "file spec"
+        private const val TAG = "DownloadFileDialog"
+        private const val REQ_SAVE_AS = 1
+
+        fun newInstance(fileInfo: FileInfo) = newInstance(DownloadFileSpec(
+                folder = fileInfo.folder,
+                path = fileInfo.path,
+                fileName = fileInfo.fileName
+        ))
+
+        fun newInstance(fileSpec: DownloadFileSpec) = FileMenuDialogFragment().apply {
+            arguments = Bundle().apply {
+                putSerializable(ARG_FILE_SPEC, fileSpec)
+            }
+        }
+    }
+
+    val fileSpec: DownloadFileSpec by lazy {
+        arguments!!.getSerializable(ARG_FILE_SPEC) as DownloadFileSpec
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        val binding = DialogFileBinding.inflate(inflater, container, false)
+
+        binding.filename = fileSpec.fileName
+
+        binding.saveAsButton.setOnClickListener {
+            startActivityForResult(
+                    Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
+                        addCategory(Intent.CATEGORY_OPENABLE)
+
+                        type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(
+                                FilenameUtils.getExtension(fileSpec.fileName)
+                        )
+
+                        putExtra(Intent.EXTRA_TITLE, fileSpec.fileName)
+                    },
+                    REQ_SAVE_AS
+            )
+        }
+
+        return binding.root
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        when (requestCode) {
+            REQ_SAVE_AS -> {
+                if (resultCode == Activity.RESULT_OK) {
+                    DownloadFileDialogFragment.newInstance(fileSpec, data!!.data!!).show(fragmentManager)
+                    dismiss()
+                }
+            }
+            else -> super.onActivityResult(requestCode, resultCode, data)
+        }
+    }
+
+    fun show(fragmentManager: FragmentManager?) {
+        show(fragmentManager, TAG)
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/FileUploadDialog.kt

@@ -0,0 +1,57 @@
+package net.syncthing.lite.dialogs
+
+import android.app.ProgressDialog
+import android.content.Context
+import android.net.Uri
+import net.syncthing.java.bep.BlockPusher
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.lite.R
+import net.syncthing.lite.library.UploadFileTask
+import net.syncthing.lite.utils.Util
+import org.jetbrains.anko.doAsync
+import org.jetbrains.anko.toast
+
+class FileUploadDialog(private val context: Context, private val syncthingClient: SyncthingClient,
+                       private val localFile: Uri, private val syncthingFolder: String,
+                       private val syncthingSubFolder: String,
+                       private val onUploadCompleteListener: () -> Unit) {
+
+    private lateinit var progressDialog: ProgressDialog
+    private var uploadFileTask: UploadFileTask? = null
+
+    fun show() {
+        showDialog()
+        doAsync {
+            uploadFileTask = UploadFileTask(context, syncthingClient, localFile, syncthingFolder,
+                    syncthingSubFolder, this@FileUploadDialog::onProgress,
+                    this@FileUploadDialog::onComplete, this@FileUploadDialog::onError)
+        }
+    }
+
+    private fun showDialog() {
+        progressDialog = ProgressDialog(context)
+        progressDialog.setMessage(context.getString(R.string.dialog_uploading_file, Util.getContentFileName(context, localFile)))
+        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL)
+        progressDialog.setCancelable(true)
+        progressDialog.setOnCancelListener { uploadFileTask?.cancel() }
+        progressDialog.isIndeterminate = true
+        progressDialog.show()
+    }
+
+    private fun onProgress(observer: BlockPusher.FileUploadObserver) {
+        progressDialog.isIndeterminate = false
+        progressDialog.progress = observer.progressPercentage()
+        progressDialog.max = 100
+    }
+
+    private fun onComplete() {
+        progressDialog.dismiss()
+        this@FileUploadDialog.context.toast(R.string.toast_upload_complete)
+        onUploadCompleteListener()
+    }
+
+    private fun onError() {
+        progressDialog.dismiss()
+        this@FileUploadDialog.context.toast(R.string.toast_file_upload_failed)
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/ReconnectIssueDialogFragment.kt

@@ -0,0 +1,32 @@
+package net.syncthing.lite.dialogs
+
+import android.os.Bundle
+import android.support.v4.app.DialogFragment
+import android.support.v4.app.FragmentActivity
+import android.support.v7.app.AlertDialog
+import net.syncthing.lite.R
+import org.jetbrains.anko.defaultSharedPreferences
+
+class ReconnectIssueDialogFragment: DialogFragment() {
+    override fun onCreateDialog(savedInstanceState: Bundle?) = AlertDialog.Builder(context!!, theme)
+            .setMessage(R.string.dialog_warning_reconnect_problem)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                context!!.defaultSharedPreferences.edit()
+                        .putBoolean(SETTINGS_PARAM, true)
+                        .apply()
+            }
+            .create()
+
+    companion object {
+        private const val DIALOG_TAG = "ReconnectIssueDialog"
+        private const val SETTINGS_PARAM = "has_educated_about_reconnect_issues"
+
+        fun showIfNeeded(activity: FragmentActivity) {
+            if (!activity.defaultSharedPreferences.getBoolean(SETTINGS_PARAM, false)) {
+                if (activity.supportFragmentManager.findFragmentByTag(DIALOG_TAG) == null) {
+                    ReconnectIssueDialogFragment().show(activity.supportFragmentManager, DIALOG_TAG)
+                }
+            }
+        }
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/downloadfile/DownloadFileDialogFragment.kt

@@ -0,0 +1,138 @@
+package net.syncthing.lite.dialogs.downloadfile
+
+import android.app.Dialog
+import android.app.ProgressDialog
+import android.arch.lifecycle.Observer
+import android.arch.lifecycle.ViewModelProviders
+import android.content.ActivityNotFoundException
+import android.content.DialogInterface
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.support.v4.app.DialogFragment
+import android.support.v4.app.FragmentManager
+import android.util.Log
+import android.webkit.MimeTypeMap
+import net.syncthing.java.core.beans.FileInfo
+import net.syncthing.lite.BuildConfig
+import net.syncthing.lite.R
+import net.syncthing.lite.library.CacheFileProviderUrl
+import net.syncthing.lite.library.LibraryHandler
+import org.apache.commons.io.FilenameUtils
+import org.jetbrains.anko.newTask
+import org.jetbrains.anko.toast
+
+class DownloadFileDialogFragment : DialogFragment() {
+    companion object {
+        private const val ARG_FILE_SPEC = "file spec"
+        private const val ARG_SAVE_AS_URI = "save as"
+        private const val TAG = "DownloadFileDialog"
+
+        fun newInstance(fileInfo: FileInfo) = newInstance(DownloadFileSpec(
+                folder = fileInfo.folder,
+                path = fileInfo.path,
+                fileName = fileInfo.fileName
+        ))
+
+        fun newInstance(
+                fileSpec: DownloadFileSpec,
+                outputUri: Uri? = null
+        ) = DownloadFileDialogFragment().apply {
+            arguments = Bundle().apply {
+                putSerializable(ARG_FILE_SPEC, fileSpec)
+
+                if (outputUri != null) {
+                    putParcelable(ARG_SAVE_AS_URI, outputUri)
+                }
+            }
+        }
+    }
+
+    val model: DownloadFileDialogViewModel by lazy {
+        ViewModelProviders.of(this).get(DownloadFileDialogViewModel::class.java)
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val fileSpec = arguments!!.getSerializable(ARG_FILE_SPEC) as DownloadFileSpec
+        val outputUri = if (arguments!!.containsKey(ARG_SAVE_AS_URI))
+            arguments!!.getParcelable(ARG_SAVE_AS_URI) as Uri
+        else
+            null
+
+        model.init(
+                libraryHandler = LibraryHandler(context!!),
+                fileSpec = fileSpec,
+                externalCacheDir = context!!.externalCacheDir,
+                outputUri = outputUri,
+                contentResolver = context!!.contentResolver
+        )
+
+        val progressDialog = ProgressDialog(context).apply {
+            setMessage(context!!.getString(R.string.dialog_downloading_file, fileSpec.fileName))
+            setProgressStyle(ProgressDialog.STYLE_HORIZONTAL)
+            isCancelable = true
+            isIndeterminate = true
+            max = DownloadFileStatusRunning.MAX_PROGRESS
+        }
+
+        model.status.observe(this, Observer {
+            status ->
+
+            when (status) {
+                is DownloadFileStatusRunning -> {
+                    progressDialog.apply {
+                        isIndeterminate = false
+                        progress = status.progress
+                    }
+                }
+                is DownloadFileStatusDone -> {
+                    dismissAllowingStateLoss()
+
+                    if (outputUri == null) {
+                        val mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(FilenameUtils.getExtension(fileSpec.fileName))
+
+                        try {
+                            context!!.startActivity(
+                                    Intent(Intent.ACTION_VIEW)
+                                            .setDataAndType(
+                                                    CacheFileProviderUrl.fromFile(
+                                                            filename = fileSpec.fileName,
+                                                            mimeType = mimeType,
+                                                            file = status.file,
+                                                            context = context!!
+                                                    ).serialized,
+                                                    mimeType
+                                            )
+                                            .newTask()
+                                            .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                            )
+                        } catch (e: ActivityNotFoundException) {
+                            if (BuildConfig.DEBUG) {
+                                Log.w(TAG, "No handler found for file " + status.file.name, e)
+                            }
+
+                            context!!.toast(R.string.toast_open_file_failed)
+                        }
+                    }
+                }
+                is DownloadFileStatusFailed -> {
+                    dismissAllowingStateLoss()
+
+                    context!!.toast(R.string.toast_file_download_failed)
+                }
+            }
+        })
+
+        return progressDialog
+    }
+
+    override fun onCancel(dialog: DialogInterface?) {
+        super.onCancel(dialog)
+
+        model.cancel()
+    }
+
+    fun show(fragmentManager: FragmentManager?) {
+        show(fragmentManager, TAG)
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/downloadfile/DownloadFileDialogViewModel.kt

@@ -0,0 +1,118 @@
+package net.syncthing.lite.dialogs.downloadfile
+
+import android.arch.lifecycle.LiveData
+import android.arch.lifecycle.MutableLiveData
+import android.arch.lifecycle.ViewModel
+import android.content.ContentResolver
+import android.net.Uri
+import android.support.v4.os.CancellationSignal
+import android.util.Log
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import net.syncthing.lite.BuildConfig
+import net.syncthing.lite.library.DownloadFileTask
+import net.syncthing.lite.library.LibraryHandler
+import org.apache.commons.io.FileUtils
+import java.io.File
+
+class DownloadFileDialogViewModel : ViewModel() {
+    companion object {
+        private const val TAG = "DownloadFileDialog"
+    }
+
+    private var isInitialized = false
+    private val statusInternal = MutableLiveData<DownloadFileStatus>()
+    private val cancellationSignal = CancellationSignal()
+    val status: LiveData<DownloadFileStatus> = statusInternal
+
+    fun init(
+            libraryHandler: LibraryHandler,
+            fileSpec: DownloadFileSpec,
+            externalCacheDir: File,
+            outputUri: Uri?,
+            contentResolver: ContentResolver
+    ) {
+        if (isInitialized) {
+            return
+        }
+
+        isInitialized = true
+
+        libraryHandler.start()
+
+        // this keeps the client only active as long as the block is running
+        // but the file downloading is not synchronous.
+        // Due to that, the start and stop calls are used.
+        libraryHandler.syncthingClient {
+            syncthingClient ->
+
+            try {
+                val fileInfo = syncthingClient.indexHandler.getFileInfoByPath(
+                        folder = fileSpec.folder,
+                        path = fileSpec.path
+                )!!
+
+                val task = DownloadFileTask(
+                        fileStorageDirectory = externalCacheDir,
+                        syncthingClient = syncthingClient,
+                        fileInfo = fileInfo,
+                        onProgress = { status ->
+                            val newProgress = (status.downloadedBytes * DownloadFileStatusRunning.MAX_PROGRESS / status.totalTransferSize).toInt()
+                            val currentStatus = statusInternal.value
+
+                            // only update if it changed
+                            if (!(currentStatus is DownloadFileStatusRunning) || currentStatus.progress != newProgress) {
+                                statusInternal.value = DownloadFileStatusRunning(newProgress)
+                            }
+                        },
+                        onComplete = { file ->
+                            libraryHandler.stop()
+
+                            GlobalScope.launch {
+                                try {
+                                    if (outputUri != null) {
+                                        contentResolver.openOutputStream(outputUri).use { outputStream ->
+                                            FileUtils.copyFile(file, outputStream)
+                                        }
+                                    }
+
+                                    statusInternal.postValue(DownloadFileStatusDone(file))
+                                } catch (ex: Exception) {
+                                    if (BuildConfig.DEBUG) {
+                                        Log.w(TAG, "downloading file failed", ex)
+                                    }
+
+                                    statusInternal.postValue(DownloadFileStatusFailed)
+                                }
+                            }
+                        },
+                        onError = {
+                            statusInternal.value = DownloadFileStatusFailed
+
+                            libraryHandler.stop()
+                        }
+                )
+
+                cancellationSignal.setOnCancelListener {
+                    task.cancel()
+                }
+            } catch (ex: Exception) {
+                if (BuildConfig.DEBUG) {
+                    Log.w(TAG, "downloading file failed", ex)
+                }
+
+                statusInternal.postValue(DownloadFileStatusFailed)
+            }
+        }
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+
+        cancel()
+    }
+
+    fun cancel() {
+        cancellationSignal.cancel()
+    }
+}

app/src/main/kotlin/net/syncthing/lite/dialogs/downloadfile/DownloadFileSpec.kt

@@ -0,0 +1,5 @@
+package net.syncthing.lite.dialogs.downloadfile
+
+import java.io.Serializable
+
+data class DownloadFileSpec(val folder: String, val path: String, val fileName: String): Serializable

app/src/main/kotlin/net/syncthing/lite/dialogs/downloadfile/DownloadFileStatus.kt

@@ -0,0 +1,12 @@
+package net.syncthing.lite.dialogs.downloadfile
+
+import java.io.File
+
+sealed class DownloadFileStatus
+object DownloadFileStatusFailed: DownloadFileStatus()
+data class DownloadFileStatusDone(val file: File): DownloadFileStatus()
+data class DownloadFileStatusRunning(val progress: Int): DownloadFileStatus() {
+    companion object {
+        const val MAX_PROGRESS = 100
+    }
+}

app/src/main/kotlin/net/syncthing/lite/fragments/DevicesFragment.kt

@@ -5,138 +5,124 @@ import android.content.Context
 import android.content.Intent
 import android.databinding.DataBindingUtil
 import android.os.Bundle
-import android.support.v4.app.Fragment
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.InputMethodManager
-import android.widget.EditText
-import android.widget.Toast
 import com.google.zxing.integration.android.IntentIntegrator
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import net.syncthing.java.core.beans.DeviceInfo
-import net.syncthing.java.core.beans.DeviceStats
-import net.syncthing.java.core.security.KeystoreHandler
 import net.syncthing.lite.R
-import net.syncthing.lite.activities.SyncthingActivity
+import net.syncthing.lite.adapters.DeviceAdapterListener
 import net.syncthing.lite.adapters.DevicesAdapter
 import net.syncthing.lite.databinding.FragmentDevicesBinding
-import net.syncthing.lite.utils.UpdateIndexTask
-import org.apache.commons.lang3.StringUtils.isBlank
-import uk.co.markormesher.android_fab.SpeedDialMenuAdapter
-import uk.co.markormesher.android_fab.SpeedDialMenuItem
-import java.security.InvalidParameterException
+import net.syncthing.lite.databinding.ViewEnterDeviceIdBinding
+import net.syncthing.lite.utils.FragmentIntentIntegrator
+import net.syncthing.lite.utils.Util
+import java.io.IOException
 
-class DevicesFragment : Fragment() {
+class DevicesFragment : SyncthingFragment() {
 
-    companion object {
-        private val TAG = "DevicesFragment"
-    }
-
-    private lateinit var syncthingActivity: SyncthingActivity
     private lateinit var binding: FragmentDevicesBinding
-    private lateinit var adapter: DevicesAdapter
+    private val adapter = DevicesAdapter()
+    private var addDeviceDialog: AlertDialog? = null
+    private var addDeviceDialogBinding: ViewEnterDeviceIdBinding? = null
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                               savedInstanceState: Bundle?): View? {
         binding = DataBindingUtil.inflate(layoutInflater, R.layout.fragment_devices, container, false)
-        binding.list.emptyView = binding.empty
-        binding.fab.speedDialMenuAdapter = FabMenuAdapter()
+        binding.addDevice.setOnClickListener { showDialog() }
         return binding.root
     }
 
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        syncthingActivity = activity as SyncthingActivity
+    override fun onResume() {
+        super.onResume()
+        libraryHandler.syncthingClient { it.addOnConnectionChangedListener { _ -> updateDeviceList() } }
+    }
+
+    override fun onPause() {
+        super.onPause()
+        libraryHandler.syncthingClient { it.removeOnConnectionChangedListener{ _ -> updateDeviceList() } }
+    }
+
+    override fun onLibraryLoaded() {
         initDeviceList()
         updateDeviceList()
     }
 
     private fun initDeviceList() {
-        adapter = DevicesAdapter(syncthingActivity)
         binding.list.adapter = adapter
-        binding.list.setOnItemLongClickListener { _, _, position, _ ->
-            val deviceId = (binding.list.getItemAtPosition(position) as DeviceStats).deviceId
-            AlertDialog.Builder(syncthingActivity)
-                    .setTitle("remove device " + deviceId.substring(0, 7))
-                    .setMessage("remove device" + deviceId.substring(0, 7) + " from list of known devices?")
-                    .setPositiveButton(android.R.string.yes) { _, _ ->
-                        syncthingActivity.configuration().edit().removePeer(deviceId).persistLater() }
-                    .setNegativeButton(android.R.string.no, null)
-                    .show()
-            Log.d(TAG, "showFolderListView delete device = '$deviceId'")
-            false
+
+        adapter.listener = object: DeviceAdapterListener {
+            override fun onDeviceLongClicked(deviceInfo: DeviceInfo): Boolean {
+                AlertDialog.Builder(context)
+                        .setTitle(getString(R.string.remove_device_title, deviceInfo.name))
+                        .setMessage(getString(R.string.remove_device_message, deviceInfo.deviceId.deviceId.substring(0, 7)))
+                        .setPositiveButton(android.R.string.yes) { _, _ ->
+                            libraryHandler.library { config, syncthingClient, _ ->
+                                config.peers = config.peers.filterNot { it.deviceId == deviceInfo.deviceId }.toSet()
+                                config.persistLater()
+                                updateDeviceList()
+
+                                syncthingClient.disconnectFromRemovedDevices()
+                            }
+                        }
+                        .setNegativeButton(android.R.string.no, null)
+                        .show()
+
+                return false
+            }
         }
     }
 
     private fun updateDeviceList() {
-        adapter.clear()
-        adapter.addAll(syncthingActivity.syncthingClient().devicesHandler.deviceStatsList)
-        adapter.notifyDataSetChanged()
+        libraryHandler.syncthingClient { syncthingClient ->
+            GlobalScope.launch (Dispatchers.Main) {
+                adapter.data = syncthingClient.getPeerStatus()
+                binding.isEmpty = adapter.data.isEmpty()
+            }
+        }
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
-        // Check if this was a QR code scan.
         val scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent)
-        if (scanResult != null) {
-            val deviceId = scanResult.contents
-            if (!isBlank(deviceId)) {
-                importDeviceId(deviceId)
-            }
+        if (scanResult?.contents != null && scanResult.contents.isNotBlank()) {
+            addDeviceDialogBinding?.deviceId?.setText(scanResult.contents)
         }
     }
 
-    private fun importDeviceId(deviceId: String) {
-        try {
-            KeystoreHandler.validateDeviceId(deviceId)
-        } catch (e: IllegalArgumentException) {
-            Toast.makeText(context, R.string.invalid_device_id, Toast.LENGTH_SHORT).show()
-            return
-        }
-
-        val modified = syncthingActivity.configuration().edit().addPeers(DeviceInfo(deviceId, null))
-        if (modified) {
-            syncthingActivity.configuration().edit().persistLater()
-            Toast.makeText(context, "successfully imported device: " + deviceId, Toast.LENGTH_SHORT).show()
-            updateDeviceList()//TODO remove this if event triggered (and handler trigger update)
-            UpdateIndexTask(syncthingActivity, syncthingActivity.syncthingClient()).updateIndex()
-        } else {
-            Toast.makeText(context, "device already present: " + deviceId, Toast.LENGTH_SHORT).show()
-        }
-    }
-
-    private inner class FabMenuAdapter : SpeedDialMenuAdapter() {
-        override fun getCount(): Int {
-            return 2
-        }
-
-        override fun getMenuItem(context: Context, position: Int): SpeedDialMenuItem {
-            when (position) {
-                0 -> return SpeedDialMenuItem(context, R.drawable.ic_qr_code_white_24dp, R.string.scan_qr_code)
-                1 -> return SpeedDialMenuItem(context, R.drawable.ic_edit_white_24dp, R.string.enter_device_id)
+    private fun showDialog() {
+        addDeviceDialogBinding = DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.view_enter_device_id, null, false)
+        addDeviceDialogBinding?.let { binding ->
+            binding.scanQrCode.setOnClickListener {
+                FragmentIntentIntegrator(this@DevicesFragment).initiateScan()
+            }
+            binding.deviceId.post {
+                val imm = context!!.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+                imm.showSoftInput(binding.deviceId, InputMethodManager.SHOW_IMPLICIT)
             }
-            throw InvalidParameterException()
-        }
 
-        override fun onMenuItemClick(position: Int): Boolean {
-            when (position) {
-                0 -> FragmentIntentIntegrator(this@DevicesFragment).initiateScan()
-                1 -> {
-                    val editText = EditText(context)
-                    val dialog = AlertDialog.Builder(context)
-                            .setTitle(R.string.device_id_dialog_title)
-                            .setView(editText)
-                            .setPositiveButton(android.R.string.ok) { _, _ -> importDeviceId(editText.text.toString()) }
-                            .setNegativeButton(android.R.string.cancel, null)
-                            .create()
-                    dialog.setOnShowListener {
-                        val imm = context!!.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
-                        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT)
+            addDeviceDialog = AlertDialog.Builder(context)
+                    .setTitle(R.string.device_id_dialog_title)
+                    .setView(binding.root)
+                    .setPositiveButton(android.R.string.ok, null)
+                    .setNegativeButton(android.R.string.cancel, null)
+                    .show()
+
+            // Use different listener to keep dialog open after button click.
+            // https://stackoverflow.com/a/15619098
+            addDeviceDialog?.getButton(AlertDialog.BUTTON_POSITIVE)
+                    ?.setOnClickListener {
+                        try {
+                            val deviceId = binding.deviceId.text.toString()
+                            Util.importDeviceId(libraryHandler, context, deviceId, { updateDeviceList() })
+                            addDeviceDialog?.dismiss()
+                        } catch (e: IOException) {
+                            binding.deviceId.error = getString(R.string.invalid_device_id)
+                        }
                     }
-                    dialog.show()
-                }
-            }
-            return true
         }
     }
 }

app/src/main/kotlin/net/syncthing/lite/fragments/FoldersFragment.kt

@@ -1,59 +1,45 @@
 package net.syncthing.lite.fragments
 
-import android.content.Intent
-import android.databinding.DataBindingUtil
+import android.arch.lifecycle.Observer
 import android.os.Bundle
-import android.support.v4.app.Fragment
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import com.google.common.collect.Lists
-import com.google.common.collect.Ordering
+import kotlinx.coroutines.channels.consumeEach
+import kotlinx.coroutines.launch
 import net.syncthing.java.core.beans.FolderInfo
 import net.syncthing.java.core.beans.FolderStats
-import net.syncthing.lite.R
 import net.syncthing.lite.activities.FolderBrowserActivity
-import net.syncthing.lite.activities.SyncthingActivity
+import net.syncthing.lite.adapters.FolderListAdapterListener
 import net.syncthing.lite.adapters.FoldersListAdapter
 import net.syncthing.lite.databinding.FragmentFoldersBinding
-import org.apache.commons.lang3.tuple.Pair
-import java.util.*
+import org.jetbrains.anko.intentFor
 
-class FoldersFragment : Fragment() {
+class FoldersFragment : SyncthingFragment() {
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        val adapter = FoldersListAdapter()
 
-    companion object {
-        private val TAG = "FoldersFragment"
-    }
+        adapter.listener = object : FolderListAdapterListener {
+            override fun onFolderClicked(folderInfo: FolderInfo, folderStats: FolderStats) {
+                startActivity(
+                        activity!!.intentFor<FolderBrowserActivity>(
+                                FolderBrowserActivity.EXTRA_FOLDER_NAME to folderInfo.folderId
+                        )
+                )
+            }
+        }
 
-    private lateinit var syncthingActivity: SyncthingActivity
-    private lateinit var binding: FragmentFoldersBinding
+        val binding = FragmentFoldersBinding.inflate(layoutInflater, container, false)
+        binding.list.adapter = adapter
+        libraryHandler.isListeningPortTaken.observe(this, Observer { binding.listeningPortTaken = it })
+
+        launch {
+            libraryHandler.subscribeToFolderStatusList().consumeEach {
+                adapter.data = it
+                binding.isEmpty = it.isEmpty()
+            }
+        }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
-                              savedInstanceState: Bundle?): View? {
-        binding = DataBindingUtil.inflate(layoutInflater, R.layout.fragment_folders, container, false)
-        binding.list.emptyView = binding.empty
         return binding.root
     }
-
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        syncthingActivity = activity as SyncthingActivity
-        showAllFoldersListView()
-    }
-
-    private fun showAllFoldersListView() {
-        val list = Lists.newArrayList(syncthingActivity.folderBrowser().folderInfoAndStatsList)
-        Collections.sort(list, Ordering.natural<Comparable<String>>()
-                .onResultOf<Pair<FolderInfo, FolderStats>> { input -> input?.left?.label })
-        Log.i(TAG, "list folders = " + list + " (" + list.size + " records")
-        val adapter = FoldersListAdapter(context!!, list)
-        binding.list.adapter = adapter
-        binding.list.setOnItemClickListener { _, _, position, _ ->
-            val folder = adapter.getItem(position)!!.left.folder
-            val intent = Intent(context, FolderBrowserActivity::class.java)
-            intent.putExtra(FolderBrowserActivity.EXTRA_FOLDER_NAME, folder)
-            startActivity(intent)
-        }
-    }
 }

app/src/main/kotlin/net/syncthing/lite/fragments/MIVFilePickerFragment.kt

@@ -1,31 +0,0 @@
-package net.syncthing.lite.fragments
-
-import android.view.View
-import com.nononsenseapps.filepicker.AbstractFilePickerFragment
-
-import com.nononsenseapps.filepicker.FilePickerFragment
-
-import java.io.File
-
-class MIVFilePickerFragment : FilePickerFragment() {
-
-    override fun onClickCheckable(v: View, vh: AbstractFilePickerFragment<File>.CheckableViewHolder) {
-        // auto open file on click
-        if (!allowMultiple) {
-            // Clear is necessary, in case user clicked some checkbox directly
-            mCheckedItems.clear()
-            mCheckedItems.add(vh.file)
-            onClickOk(null)
-        } else {
-            super.onClickCheckable(v, vh)
-        }
-    }
-
-    //    private static final String EXTENSION = ".*[.](jpg|png|jpeg)";
-
-
-    override fun isItemVisible(file: File): Boolean {
-        //        return  isDir(file) || file.getName().toLowerCase().matches(EXTENSION);
-        return true
-    }
-}

app/src/main/kotlin/net/syncthing/lite/fragments/SettingsFragment.kt

@@ -0,0 +1,38 @@
+package net.syncthing.lite.fragments
+
+import android.os.Bundle
+import android.support.v7.preference.EditTextPreference
+import android.support.v7.preference.PreferenceFragmentCompat
+import net.syncthing.lite.R
+import net.syncthing.lite.activities.SyncthingActivity
+
+class SettingsFragment : PreferenceFragmentCompat() {
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        addPreferencesFromResource(R.xml.preferences)
+
+        val localDeviceName = findPreference("local_device_name") as EditTextPreference
+        val appVersion      = findPreference("app_version")
+        val forceStop       = findPreference("force_stop")
+
+        (activity as SyncthingActivity?)?.let { activity ->
+            val versionName = activity.packageManager.getPackageInfo(activity.packageName, 0)?.versionName
+            appVersion.summary = versionName
+
+            activity.libraryHandler.configuration { localDeviceName.text = it.localDeviceName }
+            localDeviceName.setOnPreferenceChangeListener { _, _ ->
+                activity.libraryHandler.configuration { conf ->
+                    conf.localDeviceName = localDeviceName.text
+                    conf.persistLater()
+                }
+                true
+            }
+        }
+
+        forceStop.setOnPreferenceClickListener {
+            System.exit(0)
+
+            true
+        }
+    }
+}

app/src/main/kotlin/net/syncthing/lite/fragments/SyncthingDialogFragment.kt

@@ -0,0 +1,22 @@
+package net.syncthing.lite.fragments
+
+import android.support.v4.app.DialogFragment
+import net.syncthing.lite.library.LibraryHandler
+
+abstract class SyncthingDialogFragment : DialogFragment() {
+    val libraryHandler: LibraryHandler by lazy { LibraryHandler(
+            context = context!!
+    )}
+
+    override fun onStart() {
+        super.onStart()
+
+        libraryHandler.start()
+    }
+
+    override fun onStop() {
+        super.onStop()
+
+        libraryHandler.stop()
+    }
+}

app/src/main/kotlin/net/syncthing/lite/fragments/SyncthingFragment.kt

@@ -0,0 +1,25 @@
+package net.syncthing.lite.fragments
+
+import net.syncthing.lite.async.CoroutineFragment
+import net.syncthing.lite.library.LibraryHandler
+
+abstract class SyncthingFragment : CoroutineFragment() {
+    val libraryHandler: LibraryHandler by lazy { LibraryHandler(context = context!!)}
+
+    override fun onStart() {
+        super.onStart()
+
+        libraryHandler.start {
+            // TODO: check if this is still useful
+            onLibraryLoaded()
+        }
+    }
+
+    override fun onStop() {
+        super.onStop()
+
+        libraryHandler.stop()
+    }
+
+    open fun onLibraryLoaded() {}
+}

app/src/main/kotlin/net/syncthing/lite/library/CacheFileProvider.kt

@@ -0,0 +1,105 @@
+package net.syncthing.lite.library
+
+import android.content.ContentProvider
+import android.content.ContentValues
+import android.content.Context
+import android.database.Cursor
+import android.database.MatrixCursor
+import android.net.Uri
+import android.os.ParcelFileDescriptor
+import android.provider.OpenableColumns
+import java.io.File
+import java.io.IOException
+
+class CacheFileProvider: ContentProvider() {
+    companion object {
+        const val AUTHORITY = "net.syncthing.lite.fileprovider"
+    }
+
+    override fun onCreate() = true
+
+    override fun insert(uri: Uri?, values: ContentValues?): Uri {
+        throw NotImplementedError()
+    }
+
+    override fun update(uri: Uri?, values: ContentValues?, selection: String?, selectionArgs: Array<out String>?): Int {
+        throw NotImplementedError()
+    }
+
+    override fun delete(uri: Uri?, selection: String?, selectionArgs: Array<out String>?): Int {
+        throw NotImplementedError()
+    }
+
+    override fun query(uri: Uri, projection: Array<out String>?, selection: String?, selectionArgs: Array<out String>?, sortOrder: String?): Cursor {
+        val url = CacheFileProviderUrl.fromUri(uri)
+        val file = url.getFile(context)
+
+        val resultProjection = projection ?: arrayOf(OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE)
+        val resultCursor = MatrixCursor(resultProjection)
+
+        if (file.exists()) {
+            val builder = resultCursor.newRow()
+
+            for (row in resultProjection) {
+                when (row) {
+                    OpenableColumns.DISPLAY_NAME -> builder.add(url.filename)
+                    OpenableColumns.SIZE -> builder.add(file.length())
+                    else -> builder.add(null)
+                }
+            }
+        }
+
+        return resultCursor
+    }
+
+    override fun getType(uri: Uri): String = CacheFileProviderUrl.fromUri(uri).mimeType
+
+    override fun openFile(uri: Uri, mode: String): ParcelFileDescriptor {
+        if (mode == "r") {
+            val url = CacheFileProviderUrl.fromUri(uri)
+            val file = url.getFile(context)
+
+            return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY)
+        } else {
+            throw IOException("illegal mode")
+        }
+    }
+}
+
+data class CacheFileProviderUrl(
+        val pathInCacheDirectory: String,
+        val filename: String,
+        val mimeType: String
+) {
+    companion object {
+        private const val PATH = "path"
+        private const val FILENAME = "filename"
+        private const val MIME_TYPE = "mimeType"
+
+        fun fromUri(uri: Uri) = CacheFileProviderUrl(
+                pathInCacheDirectory = uri.getQueryParameter(PATH),
+                filename = uri.getQueryParameter(FILENAME),
+                mimeType = uri.getQueryParameter(MIME_TYPE)
+        )
+
+        fun fromFile(file: File, filename: String, mimeType: String, context: Context) = CacheFileProviderUrl(
+                filename = filename,
+                mimeType = mimeType,
+                pathInCacheDirectory = file.toRelativeString(context.externalCacheDir)
+        )
+    }
+
+    val serialized: Uri by lazy {
+        Uri.Builder()
+                .scheme("content")
+                .authority(CacheFileProvider.AUTHORITY)
+                .appendQueryParameter(PATH, pathInCacheDirectory)
+                .appendQueryParameter(FILENAME, filename)
+                .appendQueryParameter(MIME_TYPE, mimeType)
+                .build()
+    }
+
+    fun getFile(context: Context): File {
+        return File(context.externalCacheDir, pathInCacheDirectory)
+    }
+}

app/src/main/kotlin/net/syncthing/lite/library/DefaultLibraryManager.kt

@@ -0,0 +1,65 @@
+package net.syncthing.lite.library
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import net.syncthing.lite.BuildConfig
+import net.syncthing.lite.R
+import org.jetbrains.anko.defaultSharedPreferences
+
+object DefaultLibraryManager {
+    private const val LOG_TAG = "DefaultLibraryManager"
+
+    private var instance: LibraryManager? = null
+    private val lock = Object()
+    private val handler = Handler(Looper.getMainLooper())
+
+    fun with(context: Context) = withApplicationContext(context.applicationContext)
+
+    private fun withApplicationContext(context: Context): LibraryManager {
+        if (instance == null) {
+            synchronized(lock) {
+                if (instance == null) {
+                    val shutdownRunnable = Runnable {
+                        instance!!.shutdownIfThereAreZeroUsers()
+                    }
+
+                    fun scheduleShutdown() {
+                        val shutdownDelay = context.defaultSharedPreferences.getString(
+                                "shutdown_delay",
+                                context.getString(R.string.default_shutdown_delay)
+                        ).toLong()
+
+                        handler.postDelayed(shutdownRunnable, shutdownDelay)
+                    }
+
+                    fun cancelShutdown() {
+                        handler.removeCallbacks(shutdownRunnable)
+                    }
+
+                    instance = LibraryManager(
+                            synchronousInstanceCreator = { LibraryInstance(context) },
+                            userCounterListener = {
+                                newUserCounter ->
+
+                                if (BuildConfig.DEBUG) {
+                                    Log.d(LOG_TAG, "user counter updated to $newUserCounter")
+                                }
+
+                                val isUsed = newUserCounter > 0
+
+                                if (isUsed) {
+                                    cancelShutdown()
+                                } else {
+                                    scheduleShutdown()
+                                }
+                            }
+                    )
+                }
+            }
+        }
+
+        return instance!!
+    }
+}

app/src/main/kotlin/net/syncthing/lite/library/DownloadFilePath.kt

@@ -0,0 +1,9 @@
+package net.syncthing.lite.library
+
+import java.io.File
+
+data class DownloadFilePath (val baseDirectory: File, val fileHash: String) {
+    val filesDirectory = File(baseDirectory, fileHash.substring(0, 2))
+    val targetFile = File(filesDirectory, fileHash.substring(2))
+    val tempFile = File(filesDirectory, fileHash.substring(2) + "_temp")
+}

app/src/main/kotlin/net/syncthing/lite/library/DownloadFileTask.kt

@@ -0,0 +1,143 @@
+package net.syncthing.lite.library
+
+import android.os.Handler
+import android.os.Looper
+import android.support.v4.os.CancellationSignal
+import android.util.Log
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.suspendCancellableCoroutine
+import net.syncthing.java.bep.BlockPullerStatus
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.java.core.beans.FileInfo
+import net.syncthing.lite.BuildConfig
+import org.apache.commons.io.FileUtils
+import java.io.File
+import java.io.IOException
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+
+class DownloadFileTask(private val fileStorageDirectory: File,
+                       syncthingClient: SyncthingClient,
+                       private val fileInfo: FileInfo,
+                       private val onProgress: (status: BlockPullerStatus) -> Unit,
+                       private val onComplete: (File) -> Unit,
+                       private val onError: (Exception) -> Unit) {
+
+    companion object {
+        private const val TAG = "DownloadFileTask"
+        private val handler = Handler(Looper.getMainLooper())
+
+        suspend fun downloadFileCoroutine(
+                externalCacheDir: File,
+                syncthingClient: SyncthingClient,
+                fileInfo: FileInfo,
+                onProgress: (status: BlockPullerStatus) -> Unit
+        ) = suspendCancellableCoroutine<File> {
+            continuation ->
+
+            val task = DownloadFileTask(
+                    externalCacheDir,
+                    syncthingClient,
+                    fileInfo,
+                    onProgress,
+                    {
+                        continuation.resume(it)
+                    },
+                    {
+                        continuation.resumeWithException(it)
+                    }
+            )
+
+            continuation.invokeOnCancellation {
+                task.cancel()
+            }
+        }
+    }
+
+    private val cancellationSignal = CancellationSignal()
+    private var doneListenerCalled = false
+
+    init {
+        val file = DownloadFilePath(fileStorageDirectory, fileInfo.hash!!)
+
+        GlobalScope.launch {
+            if (file.targetFile.exists()) {
+                if (BuildConfig.DEBUG) {
+                    Log.d(TAG, "there is already a file")
+                }
+
+                callComplete(file.targetFile)
+
+                return@launch
+            }
+
+            try {
+                if (!file.filesDirectory.isDirectory) {
+                    if (!file.filesDirectory.mkdirs()) {
+                        throw IOException("could not create output directory")
+                    }
+                }
+
+                // download the file to a temp location
+                val inputStream = syncthingClient.pullFile(fileInfo, this@DownloadFileTask::callProgress)
+
+                try {
+                    FileUtils.copyInputStreamToFile(inputStream, file.tempFile)
+                    file.tempFile.renameTo(file.targetFile)
+                } finally {
+                    file.tempFile.delete()
+                }
+
+                if (BuildConfig.DEBUG) {
+                    Log.i(TAG, "Downloaded file $fileInfo")
+                }
+
+                callComplete(file.targetFile)
+            } catch (e: Exception) {
+                callError(e)
+
+                if (BuildConfig.DEBUG) {
+                    Log.w(TAG, "Failed to download file $fileInfo", e)
+                }
+            }
+        }
+    }
+
+    private fun callProgress(status: BlockPullerStatus) {
+        handler.post {
+            if (!doneListenerCalled) {
+                if (BuildConfig.DEBUG) {
+                    Log.i("pullFile", "download progress = $status")
+                }
+
+                onProgress(status)
+            }
+        }
+    }
+
+    private fun callComplete(file: File) {
+        handler.post {
+            if (!doneListenerCalled) {
+                doneListenerCalled = true
+
+                onComplete(file)
+            }
+        }
+    }
+
+    private fun callError(exception: Exception) {
+        handler.post {
+            if (!doneListenerCalled) {
+                doneListenerCalled = true
+
+                onError(exception)
+            }
+        }
+    }
+
+    fun cancel() {
+        cancellationSignal.cancel()
+        callError(InterruptedException())
+    }
+}

app/src/main/kotlin/net/syncthing/lite/library/LibraryHandler.kt

@@ -0,0 +1,142 @@
+package net.syncthing.lite.library
+
+import android.arch.lifecycle.LiveData
+import android.arch.lifecycle.MutableLiveData
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.channels.BroadcastChannel
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.channels.consumeEach
+import kotlinx.coroutines.launch
+import net.syncthing.java.bep.folder.FolderBrowser
+import net.syncthing.java.bep.folder.FolderStatus
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.java.core.beans.DeviceId
+import net.syncthing.java.core.configuration.Configuration
+import org.jetbrains.anko.doAsync
+import java.util.concurrent.atomic.AtomicBoolean
+
+/**
+ * This class helps when using the library.
+ * It's required to start and stop it to make the callbacks fire (or stop to fire).
+ *
+ * It's possible to do multiple start and stop cycles with one instance of this class.
+ */
+class LibraryHandler(context: Context) {
+
+    companion object {
+        private const val TAG = "LibraryHandler"
+        private val handler = Handler(Looper.getMainLooper())
+    }
+
+    val libraryManager = DefaultLibraryManager.with(context)
+    private val isStarted = AtomicBoolean(false)
+    private val isListeningPortTakenInternal = MutableLiveData<Boolean>().apply { postValue(false) }
+    private val indexUpdateCompleteMessages = BroadcastChannel<String>(capacity = 16)
+    private val folderStatusList = BroadcastChannel<List<FolderStatus>>(capacity = Channel.CONFLATED)
+    private var job: Job = Job()
+
+    val isListeningPortTaken: LiveData<Boolean> = isListeningPortTakenInternal
+
+    private val messageFromUnknownDeviceListeners = HashSet<(DeviceId) -> Unit>()
+    private val internalMessageFromUnknownDeviceListener: (DeviceId) -> Unit = {
+        deviceId ->
+
+        handler.post {
+            messageFromUnknownDeviceListeners.forEach { listener -> listener(deviceId) }
+        }
+    }
+
+    fun start(onLibraryLoaded: (LibraryHandler) -> Unit = {}) {
+        if (isStarted.getAndSet(true) == true) {
+            throw IllegalStateException("already started")
+        }
+
+        libraryManager.startLibraryUsage {
+            libraryInstance ->
+
+            isListeningPortTakenInternal.value = libraryInstance.isListeningPortTaken
+            onLibraryLoaded(this)
+
+            val client = libraryInstance.syncthingClient
+
+            client.discoveryHandler.registerMessageFromUnknownDeviceListener(internalMessageFromUnknownDeviceListener)
+
+            job = Job()
+
+            GlobalScope.launch (job) {
+                libraryInstance.syncthingClient.indexHandler.subscribeToOnFullIndexAcquiredEvents().consumeEach {
+                    indexUpdateCompleteMessages.send(it)
+                }
+            }
+
+            GlobalScope.launch (job) {
+                libraryInstance.folderBrowser.folderInfoAndStatusStream().consumeEach {
+                    folderStatusList.send(it)
+                }
+            }
+        }
+    }
+
+    fun stop() {
+        if (isStarted.getAndSet(false) == false) {
+            throw IllegalStateException("already stopped")
+        }
+
+        job!!.cancel()
+
+        syncthingClient {
+            try {
+                it.discoveryHandler.unregisterMessageFromUnknownDeviceListener(internalMessageFromUnknownDeviceListener)
+            } catch (e: IllegalArgumentException) {
+                // ignored, no idea why this is thrown
+            }
+        }
+
+        libraryManager.stopLibraryUsage()
+    }
+
+    /*
+     * The callback is executed asynchronously.
+     * As soon as it returns, there is no guarantee about the availability of the library
+     */
+    fun library(callback: (Configuration, SyncthingClient, FolderBrowser) -> Unit) {
+        libraryManager.startLibraryUsage {
+            doAsync {
+                try {
+                    callback(it.configuration, it.syncthingClient, it.folderBrowser)
+                } finally {
+                    libraryManager.stopLibraryUsage()
+                }
+            }
+        }
+    }
+
+    fun syncthingClient(callback: (SyncthingClient) -> Unit) {
+        library { _, s, _ -> callback(s) }
+    }
+
+    fun configuration(callback: (Configuration) -> Unit) {
+        library { c, _, _ -> callback(c) }
+    }
+
+    fun folderBrowser(callback: (FolderBrowser) -> Unit) {
+        library { _, _, f -> callback(f) }
+    }
+
+    // these listeners are called at the UI Thread
+    // there is no need to unregister because they removed from the library when close is called
+    fun registerMessageFromUnknownDeviceListener(listener: (DeviceId) -> Unit) {
+        messageFromUnknownDeviceListeners.add(listener)
+    }
+
+    fun unregisterMessageFromUnknownDeviceListener(listener: (DeviceId) -> Unit) {
+        messageFromUnknownDeviceListeners.remove(listener)
+    }
+
+    fun subscribeToOnFullIndexAcquiredEvents() = indexUpdateCompleteMessages.openSubscription()
+    fun subscribeToFolderStatusList() = folderStatusList.openSubscription()
+}

app/src/main/kotlin/net/syncthing/lite/library/LibraryInstance.kt

@@ -0,0 +1,67 @@
+package net.syncthing.lite.library
+
+import android.content.Context
+import android.util.Log
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.java.core.configuration.Configuration
+import net.syncthing.repository.android.SqliteIndexRepository
+import net.syncthing.repository.android.TempDirectoryLocalRepository
+import net.syncthing.repository.android.database.RepositoryDatabase
+import org.jetbrains.anko.defaultSharedPreferences
+import java.io.File
+import java.net.DatagramSocket
+import java.net.InetAddress
+import java.net.SocketException
+
+/**
+ * This class is used internally to access the syncthing-java library
+ * There should be never more than 1 instance of this class
+ *
+ * This class can not be recycled. This means that after doing a shutdown of it,
+ * a new instance must be created
+ *
+ * The creation and the shutdown are synchronous, so keep them out of the UI Thread
+ */
+class LibraryInstance (context: Context) {
+    companion object {
+        private const val LOG_TAG = "LibraryInstance"
+
+        /**
+         * Check if listening port for local discovery is taken by another app. Do this check here to
+         * avoid adding another callback.
+         */
+        private fun checkIsListeningPortTaken(): Boolean {
+            try {
+                DatagramSocket(21027, InetAddress.getByName("0.0.0.0")).close()
+
+                return false
+            } catch (e: SocketException) {
+                Log.w(LOG_TAG, e)
+
+                return true
+            }
+        }
+    }
+
+    private val tempRepository = TempDirectoryLocalRepository(File(context.filesDir, "temp_repository"))
+
+    val isListeningPortTaken = checkIsListeningPortTaken()  // this must come first to work correctly
+    val configuration = Configuration(configFolder = context.filesDir)
+    val syncthingClient = SyncthingClient(
+            configuration = configuration,
+            repository = SqliteIndexRepository(
+                    database = RepositoryDatabase.with(context),
+                    closeDatabaseOnClose = false,
+                    clearTempStorageHook = { tempRepository.deleteAllData() }
+            ),
+            tempRepository = tempRepository,
+            enableDetailedException = context.defaultSharedPreferences.getBoolean("detailed_exception", false)
+    )
+    val folderBrowser = syncthingClient.indexHandler.folderBrowser
+    val indexBrowser = syncthingClient.indexHandler.indexBrowser
+
+    fun shutdown() {
+        syncthingClient.close()
+        configuration.persistNow()
+    }
+}

app/src/main/kotlin/net/syncthing/lite/library/LibraryManager.kt

@@ -0,0 +1,123 @@
+package net.syncthing.lite.library
+
+import android.os.Handler
+import android.os.Looper
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.async
+import kotlinx.coroutines.channels.ConflatedBroadcastChannel
+import kotlinx.coroutines.channels.consumeEach
+import kotlinx.coroutines.channels.produce
+import java.util.concurrent.Executors
+import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
+
+/**
+ * This class manages the access to an LibraryInstance
+ *
+ * Users can get an instance with startLibraryUsage()
+ * If they are done with it, the should call stopLibraryUsage()
+ * After this, it's NOT safe to continue using the received LibraryInstance
+ *
+ * Every call to startLibraryUsage should be followed by an call to stopLibraryUsage,
+ * even if the callback was not called yet. It can still be called, so users should watch out.
+ *
+ * All listeners are executed at the UI Thread (except the synchronousInstanceCreator)
+ *
+ * The userCounterListener is always called before the isRunningListener
+ *
+ * The listeners are called for all changes, nothing is skipped or batched
+ */
+class LibraryManager (
+        val synchronousInstanceCreator: () -> LibraryInstance,
+        val userCounterListener: (Int) -> Unit = {},
+        val isRunningListener: (isRunning: Boolean) -> Unit = {}
+) {
+    companion object {
+        private val handler = Handler(Looper.getMainLooper())
+    }
+
+    // this must be a SingleThreadExecutor to avoid race conditions
+    // only this Thread should access instance and userCounter
+    private val startStopExecutor = Executors.newSingleThreadExecutor()
+
+    private val instanceStream = ConflatedBroadcastChannel<LibraryInstance?>(null)
+    private var userCounter = 0
+
+    fun startLibraryUsage(callback: (LibraryInstance) -> Unit) {
+        startStopExecutor.submit {
+            val newUserCounter = ++userCounter
+            handler.post { userCounterListener(newUserCounter) }
+
+            if (instanceStream.value == null) {
+                instanceStream.offer(synchronousInstanceCreator())
+                handler.post { isRunningListener(true) }
+            }
+
+            handler.post { callback(instanceStream.value!!) }
+        }
+    }
+
+    suspend fun startLibraryUsageCoroutine(): LibraryInstance {
+        return suspendCoroutine { continuation ->
+            startLibraryUsage { instance ->
+                continuation.resume(instance)
+            }
+        }
+    }
+
+    suspend fun <T> withLibrary(action: suspend (LibraryInstance) -> T): T {
+        val instance = startLibraryUsageCoroutine()
+
+        return try {
+            action(instance)
+        } finally {
+            stopLibraryUsage()
+        }
+    }
+
+    fun stopLibraryUsage() {
+        startStopExecutor.submit {
+            val newUserCounter = --userCounter
+
+            if (newUserCounter < 0) {
+                userCounter = 0
+
+                throw IllegalStateException("can not stop library usage if there are 0 users")
+            }
+
+            handler.post { userCounterListener(newUserCounter) }
+        }
+    }
+
+    fun shutdownIfThereAreZeroUsers(listener: (wasShutdownPerformed: Boolean) -> Unit = {}) {
+        startStopExecutor.submit {
+            if (userCounter == 0) {
+                instanceStream.value?.shutdown()
+                instanceStream.offer(null)
+
+                handler.post { isRunningListener(false) }
+                handler.post { listener(true) }
+            } else {
+                handler.post { listener(false) }
+            }
+        }
+    }
+
+    fun streamDirectoryListing(folder: String, path: String) = GlobalScope.produce {
+        var job = Job()
+
+        instanceStream.openSubscription().consumeEach { instance ->
+            job.cancel()
+            job = Job()
+
+            if (instance != null) {
+                async (job) {
+                    instance.indexBrowser.streamDirectoryListing(folder, path).consumeEach {
+                        send(it)
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/kotlin/net/syncthing/lite/library/SyncthingProvider.kt

@@ -0,0 +1,176 @@
+package net.syncthing.lite.library
+
+import android.database.Cursor
+import android.database.MatrixCursor
+import android.os.CancellationSignal
+import android.os.ParcelFileDescriptor
+import android.provider.DocumentsContract.Document
+import android.provider.DocumentsContract.Root
+import android.provider.DocumentsProvider
+import android.util.Log
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.runBlocking
+import net.syncthing.java.bep.index.browser.DirectoryContentListing
+import net.syncthing.java.bep.index.browser.DirectoryNotFoundListing
+import net.syncthing.java.core.beans.FileInfo
+import net.syncthing.java.core.beans.FolderInfo
+import net.syncthing.lite.R
+import java.io.FileNotFoundException
+import java.net.URLConnection
+
+class SyncthingProvider : DocumentsProvider() {
+
+    companion object {
+        private const val Tag = "SyncthingProvider"
+
+        private val DefaultRootProjection = arrayOf(
+                Root.COLUMN_ROOT_ID,
+                Root.COLUMN_FLAGS,
+                Root.COLUMN_TITLE,
+                Root.COLUMN_SUMMARY,
+                Root.COLUMN_DOCUMENT_ID,
+                Root.COLUMN_ICON
+        )
+
+        private val DefaultDocumentProjection = arrayOf(
+                Document.COLUMN_DOCUMENT_ID,
+                Document.COLUMN_DISPLAY_NAME,
+                Document.COLUMN_SIZE,
+                Document.COLUMN_MIME_TYPE,
+                Document.COLUMN_LAST_MODIFIED,
+                Document.COLUMN_FLAGS
+        )
+    }
+
+    override fun onCreate(): Boolean {
+        Log.d(Tag, "onCreate()")
+        return true
+    }
+
+    // this instance is not started -> it connects and disconnects on demand
+    private val libraryManager: LibraryManager by lazy { DefaultLibraryManager.with(context) }
+
+    override fun queryRoots(projection: Array<String>?): Cursor {
+        Log.d(Tag, "queryRoots($projection)")
+
+        return runBlocking {
+            libraryManager.withLibrary { instance ->
+                MatrixCursor(projection ?: DefaultRootProjection).apply {
+                    instance.folderBrowser.folderInfoAndStatusList().forEach { folder ->
+                        newRow().apply {
+                            add(Root.COLUMN_ROOT_ID, folder.info.folderId)
+                            add(Root.COLUMN_SUMMARY, folder.info.label)
+                            add(Root.COLUMN_FLAGS, 0)
+                            add(Root.COLUMN_TITLE, context.getString(R.string.app_name))
+                            add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(folder.info))
+                            add(Root.COLUMN_ICON, R.mipmap.ic_launcher)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    override fun queryChildDocuments(parentDocumentId: String, projection: Array<String>?,
+                                     sortOrder: String?): Cursor {
+        Log.d(Tag, "queryChildDocuments($parentDocumentId, $projection, $sortOrder)")
+
+        return runBlocking {
+            libraryManager.withLibrary { instance ->
+                val listing = instance.indexBrowser.getDirectoryListing(
+                        folder = getFolderIdForDocId(parentDocumentId),
+                        path = getPathForDocId(parentDocumentId)
+                )
+
+                when (listing) {
+                    is DirectoryNotFoundListing -> throw FileNotFoundException()
+                    is DirectoryContentListing -> {
+                        val result = MatrixCursor(projection ?: DefaultDocumentProjection)
+
+                        listing.entries.forEach { entry ->
+                            includeFile(result, entry)
+                        }
+
+                        result
+                    }
+                }
+            }
+        }
+    }
+
+    override fun queryDocument(documentId: String, projection: Array<String>?): Cursor {
+        Log.d(Tag, "queryDocument($documentId, $projection)")
+
+        return runBlocking {
+            libraryManager.withLibrary {  instance ->
+                val fileInfo = instance.indexBrowser.getFileInfoByAbsolutePathAllowNull(
+                        folder = getFolderIdForDocId(documentId),
+                        path = getPathForDocId(documentId)
+                ) ?: throw FileNotFoundException()
+
+                MatrixCursor(projection ?: DefaultDocumentProjection).apply {
+                    includeFile(this, fileInfo)
+                }
+            }
+        }
+    }
+
+    @Throws(FileNotFoundException::class)
+    override fun openDocument(documentId: String, mode: String, signal: CancellationSignal?):
+            ParcelFileDescriptor {
+        Log.d(Tag, "openDocument($documentId, $mode, $signal)")
+
+        val accessMode = ParcelFileDescriptor.parseMode(mode)
+
+        if (accessMode != ParcelFileDescriptor.MODE_READ_ONLY) {
+            throw NotImplementedError()
+        }
+
+        return runBlocking {
+            libraryManager.withLibrary { instance ->
+                val fileInfo = instance.indexBrowser.getFileInfoByAbsolutePathAllowNull(
+                        folder = getFolderIdForDocId(documentId),
+                        path = getPathForDocId(documentId)
+                ) ?: throw FileNotFoundException()
+
+                signal?.setOnCancelListener {
+                    this.coroutineContext.cancel()
+                }
+
+                val outputFile = DownloadFileTask.downloadFileCoroutine(
+                        externalCacheDir = context.externalCacheDir,
+                        syncthingClient = instance.syncthingClient,
+                        fileInfo = fileInfo,
+                        onProgress = { /* ignore the progress */ }
+                )
+
+                ParcelFileDescriptor.open(outputFile, ParcelFileDescriptor.MODE_READ_ONLY)
+            }
+        }
+    }
+
+    private fun includeFile(result: MatrixCursor, fileInfo: FileInfo) {
+        result.newRow().apply {
+            add(Document.COLUMN_DOCUMENT_ID, getDocIdForFile(fileInfo))
+            add(Document.COLUMN_DISPLAY_NAME, fileInfo.fileName)
+            add(Document.COLUMN_SIZE, fileInfo.size)
+            add(
+                    Document.COLUMN_MIME_TYPE,
+                    if (fileInfo.isDirectory())
+                        Document.MIME_TYPE_DIR
+                    else
+                        URLConnection.guessContentTypeFromName(fileInfo.fileName)
+            )
+            add(Document.COLUMN_LAST_MODIFIED, fileInfo.lastModified)
+            add(Document.COLUMN_FLAGS, 0)
+        }
+    }
+
+    private fun getFolderIdForDocId(docId: String) = docId.split(":")[0]
+
+    private fun getPathForDocId(docId: String) = docId.split(":")[1]
+
+    private fun getDocIdForFile(folderInfo: FolderInfo) = folderInfo.folderId + ":"
+
+    private fun getDocIdForFile(fileInfo: FileInfo) = fileInfo.folder + ":" + fileInfo.path
+}

app/src/main/kotlin/net/syncthing/lite/library/UploadFileTask.kt

@@ -0,0 +1,63 @@
+package net.syncthing.lite.library
+
+import android.content.Context
+import android.net.Uri
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import net.syncthing.java.bep.BlockPusher
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.java.core.utils.PathUtils
+import net.syncthing.lite.utils.Util
+import org.apache.commons.io.IOUtils
+
+// TODO: this should be an IntentService with notification
+class UploadFileTask(context: Context, syncthingClient: SyncthingClient,
+                     localFile: Uri, private val syncthingFolder: String,
+                     syncthingSubFolder: String,
+                     private val onProgress: (BlockPusher.FileUploadObserver) -> Unit,
+                     private val onComplete: () -> Unit,
+                     private val onError: () -> Unit) {
+
+    companion object {
+        private const val TAG = "UploadFileTask"
+        private val handler = Handler(Looper.getMainLooper())
+    }
+
+    private val syncthingPath = PathUtils.buildPath(syncthingSubFolder, Util.getContentFileName(context, localFile))
+    private val uploadStream = context.contentResolver.openInputStream(localFile)
+
+    private var isCancelled = false
+
+    init {
+        Log.i(TAG, "Uploading file $localFile to folder $syncthingFolder:$syncthingPath")
+
+        GlobalScope.launch {
+            try {
+                val blockPusher = syncthingClient.getBlockPusher(folderId = syncthingFolder)
+                val observer = blockPusher.pushFile(uploadStream, syncthingFolder, syncthingPath)
+
+                handler.post { onProgress(observer) }
+
+                while (!observer.isCompleted()) {
+                    if (isCancelled)
+                        return@launch
+
+                    observer.waitForProgressUpdate()
+                    Log.i(TAG, "upload progress = ${observer.progressPercentage()}%")
+                    handler.post { onProgress(observer) }
+                }
+                IOUtils.closeQuietly(uploadStream)
+                handler.post { onComplete() }
+            } catch (ex: Exception) {
+                handler.post { onError() }
+            }
+        }
+    }
+
+    fun cancel() {
+        isCancelled = true
+    }
+}

app/src/main/kotlin/net/syncthing/lite/utils/DownloadFileTask.kt

@@ -1,106 +0,0 @@
-package net.syncthing.lite.utils
-
-import android.app.ProgressDialog
-import android.content.ActivityNotFoundException
-import android.content.Context
-import android.content.Intent
-import android.net.Uri
-import android.os.Environment
-import android.os.Handler
-import android.support.annotation.StringRes
-import android.util.Log
-import android.webkit.MimeTypeMap
-import android.widget.Toast
-import net.syncthing.java.bep.BlockPuller
-import net.syncthing.java.client.SyncthingClient
-import net.syncthing.java.core.beans.FileInfo
-import net.syncthing.lite.R
-import org.apache.commons.io.FileUtils
-import org.apache.commons.io.FilenameUtils
-import java.io.File
-import java.io.IOException
-
-class DownloadFileTask(private val mContext: Context, private val mSyncthingClient: SyncthingClient, private val mFileInfo: FileInfo) {
-    private val mMainHandler: Handler = Handler()
-
-    private lateinit var progressDialog: ProgressDialog
-    private var cancelled = false
-
-    fun downloadFile() {
-        showDialog()
-        // TODO: can just pass FileInfo directly?
-        Thread {
-            mSyncthingClient.pullFile(mFileInfo.folder, mFileInfo.path, { observer ->
-                onProgress(observer)
-                try {
-                    while (!observer.isCompleted) {
-                        if (cancelled)
-                            return@pullFile
-
-                        observer.waitForProgressUpdate()
-                        Log.i("pullFile", "download progress = " + observer.progressMessage)
-                        onProgress(observer)
-                    }
-
-                    val outputDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
-                    val outputFile = File(outputDir, mFileInfo.fileName)
-                    FileUtils.copyInputStreamToFile(observer.inputStream, outputFile)
-                    Log.i(TAG, "downloaded file = " + mFileInfo.path)
-                    onComplete(outputFile)
-                } catch (e: IOException) {
-                    onError(R.string.toast_file_download_failed)
-                    Log.w(TAG, "Failed to download file " + mFileInfo, e)
-                } catch (e: InterruptedException) {
-                    onError(R.string.toast_file_download_failed)
-                    Log.w(TAG, "Failed to download file " + mFileInfo, e)
-                }
-            }) { onError(R.string.toast_file_download_failed) }
-        }.start()
-    }
-
-    private fun showDialog() {
-        progressDialog = ProgressDialog(mContext)
-        progressDialog.setMessage(mContext.getString(R.string.dialog_downloading_file, mFileInfo.fileName))
-        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL)
-        progressDialog.setCancelable(true)
-        progressDialog.setOnCancelListener { cancelled = true }
-        progressDialog.isIndeterminate = true
-        progressDialog.show()
-    }
-
-    private fun onProgress(fileDownloadObserver: BlockPuller.FileDownloadObserver) {
-        mMainHandler.post {
-            progressDialog.isIndeterminate = false
-            progressDialog.max = (mFileInfo.size as Long).toInt()
-            progressDialog.progress = (fileDownloadObserver.progress * mFileInfo.size!!).toInt()
-        }
-    }
-
-    private fun onComplete(file: File) {
-        progressDialog.dismiss()
-        if (cancelled)
-            return
-
-        val mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(FilenameUtils.getExtension(file.name))
-        val intent = Intent(Intent.ACTION_VIEW)
-        intent.setDataAndType(Uri.fromFile(file), mimeType)
-        intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
-        try {
-            mContext.startActivity(intent)
-        } catch (e: ActivityNotFoundException) {
-            onError(R.string.toast_open_file_failed)
-            Log.w(TAG, "No handler found for file " + file.name, e)
-        }
-
-    }
-
-    private fun onError(@StringRes error: Int) {
-        progressDialog.dismiss()
-        mMainHandler.post { Toast.makeText(mContext, error, Toast.LENGTH_SHORT).show() }
-    }
-
-    companion object {
-
-        private val TAG = "DownloadFileTask"
-    }
-}

app/src/main/kotlin/net/syncthing/lite/utils/FragmentIntentIntegrator.kt

@@ -1,4 +1,4 @@
-package net.syncthing.lite.fragments
+package net.syncthing.lite.utils
 
 import android.content.Intent
 import android.support.v4.app.Fragment

app/src/main/kotlin/net/syncthing/lite/utils/LibraryHandler.kt

@@ -1,84 +0,0 @@
-package net.syncthing.lite.utils
-
-import android.content.Context
-import android.util.Log
-import com.google.common.eventbus.Subscribe
-import net.syncthing.java.bep.FolderBrowser
-import net.syncthing.java.bep.IndexHandler
-import net.syncthing.java.client.SyncthingClient
-import net.syncthing.java.core.beans.FolderInfo
-import net.syncthing.java.core.configuration.ConfigurationService
-import net.syncthing.java.core.security.KeystoreHandler
-import org.apache.commons.io.FileUtils
-import java.io.File
-import java.io.IOException
-
-class LibraryHandler {
-
-    private var mOnIndexUpdatedListener: OnIndexUpdatedListener? = null
-    var configuration: ConfigurationService? = null
-        private set
-    var syncthingClient: SyncthingClient? = null
-        private set
-    var folderBrowser: FolderBrowser? = null
-        private set
-
-    interface OnIndexUpdatedListener {
-        fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int)
-        fun onIndexUpdateComplete()
-    }
-
-    fun init(context: Context) {
-        configuration = ConfigurationService.newLoader()
-                .setCache(File(context.externalCacheDir, "cache"))
-                .setDatabase(File(context.getExternalFilesDir(null), "database"))
-                .loadFrom(File(context.getExternalFilesDir(null), "config.properties"))
-        configuration!!.edit().setDeviceName(Util.getDeviceName())
-        try {
-            FileUtils.cleanDirectory(configuration!!.temp)
-        } catch (ex: IOException) {
-            Log.e(TAG, "error", ex)
-            destroy()
-        }
-
-        KeystoreHandler.newLoader().loadAndStore(configuration!!)
-        configuration!!.edit().persistLater()
-        Log.i(TAG, "loaded mConfiguration = " + configuration!!.newWriter().dumpToString())
-        Log.i(TAG, "storage space = " + configuration!!.storageInfo.dumpAvailableSpace())
-        syncthingClient = net.syncthing.java.client.SyncthingClient(configuration!!)
-        //TODO listen for device events, update device list
-        folderBrowser = syncthingClient!!.indexHandler.newFolderBrowser()
-    }
-
-    fun setOnIndexUpdatedListener(onIndexUpdatedListener: OnIndexUpdatedListener) {
-        mOnIndexUpdatedListener = onIndexUpdatedListener
-        syncthingClient!!.indexHandler.eventBus.register(object : Any() {
-
-            @Subscribe
-            fun handleIndexRecordAquiredEvent(event: IndexHandler.IndexRecordAquiredEvent) {
-                val folder = syncthingClient!!.indexHandler.getFolderInfo(event.folder)
-                val indexInfo = event.indexInfo
-                event.newRecords.size
-                Log.i(TAG, "handleIndexRecordEvent trigger folder list update from index record acquired")
-                mOnIndexUpdatedListener!!.onIndexUpdateProgress(folder, (indexInfo.completed * 100).toInt())
-            }
-
-            @Subscribe
-            fun handleRemoteIndexAquiredEvent(event: IndexHandler.FullIndexAquiredEvent) {
-                Log.i(TAG, "handleIndexAquiredEvent trigger folder list update from index acquired")
-                mOnIndexUpdatedListener!!.onIndexUpdateComplete()
-            }
-        })
-    }
-
-    fun destroy() {
-        folderBrowser!!.close()
-        syncthingClient!!.close()
-        configuration!!.close()
-    }
-
-    companion object {
-
-        private val TAG = "LibConnectionHandler"
-    }
-}

app/src/main/kotlin/net/syncthing/lite/utils/UpdateIndexTask.kt

@@ -1,43 +0,0 @@
-package net.syncthing.lite.utils
-
-import android.content.Context
-import android.os.Handler
-import android.preference.PreferenceManager
-import android.widget.Toast
-import net.syncthing.java.client.SyncthingClient
-import net.syncthing.lite.R
-import java.util.*
-
-class UpdateIndexTask(private val mContext: Context, private val mSyncthingClient: SyncthingClient) {
-    private val mPreferences = PreferenceManager.getDefaultSharedPreferences(mContext)
-    private val mMainHandler = Handler()
-
-    fun updateIndex() {
-        if (sIndexUpdateInProgress)
-            return
-
-        sIndexUpdateInProgress = true
-        mSyncthingClient.updateIndexFromPeers { _, failures ->
-            sIndexUpdateInProgress = false
-            if (failures.isEmpty()) {
-                showToast(mContext.getString(R.string.toast_index_update_successful))
-            } else {
-                showToast(mContext.getString(R.string.toast_index_update_failed, failures.size))
-            }
-            mPreferences.edit()
-                    .putLong(LAST_INDEX_UPDATE_TS_PREF, Date().time)
-                    .apply()
-        }
-    }
-
-    private fun showToast(message: String) {
-        mMainHandler.post { Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show() }
-    }
-
-    companion object {
-
-        val LAST_INDEX_UPDATE_TS_PREF = "LAST_INDEX_UPDATE_TS"
-
-        private var sIndexUpdateInProgress: Boolean = false
-    }
-}

app/src/main/kotlin/net/syncthing/lite/utils/UploadFileTask.kt

@@ -1,94 +0,0 @@
-package net.syncthing.lite.utils
-
-import android.app.ProgressDialog
-import android.content.Context
-import android.net.Uri
-import android.os.Handler
-import android.util.Log
-import android.widget.Toast
-import net.syncthing.java.bep.BlockPusher
-import net.syncthing.java.client.SyncthingClient
-import net.syncthing.java.core.utils.PathUtils
-import net.syncthing.lite.R
-import java.io.IOException
-
-// TODO: this should be an IntentService with notification
-class UploadFileTask(private val context: Context, private val syncthingClient: SyncthingClient,
-                     private val localFile: Uri, private val syncthingFolder: String,
-                     syncthingSubFolder: String,
-                     private val onUploadCompleteListener: () -> Unit) {
-
-    companion object {
-        private val TAG = "UploadFileTask"
-    }
-
-    private val fileName = Util.getContentFileName(context, localFile)
-    private val syncthingPath = PathUtils.buildPath(syncthingSubFolder, fileName)
-    private val mainHandler = Handler()
-
-    private lateinit var mProgressDialog: ProgressDialog
-    private var mCancelled = false
-
-    fun uploadFile() {
-        createDialog()
-        Log.i(TAG, "Uploading file $localFile to folder $syncthingFolder:$syncthingPath")
-        try {
-            val uploadStream = context.contentResolver.openInputStream(localFile)
-            syncthingClient.pushFile(uploadStream, syncthingFolder, syncthingPath, { observer ->
-                onProgress(observer)
-                try {
-                    while (!observer.isCompleted) {
-                        if (mCancelled)
-                            return@pushFile
-
-                        observer.waitForProgressUpdate()
-                        Log.i(TAG, "upload progress = " + observer.progressMessage)
-                        onProgress(observer)
-                    }
-                } catch (e: InterruptedException) {
-                    onError()
-                }
-
-                onComplete()
-            }, { this.onError() })
-        } catch (e: IOException) {
-            onError()
-        }
-
-    }
-
-    private fun createDialog() {
-        mProgressDialog = ProgressDialog(context)
-        mProgressDialog.setMessage(context.getString(R.string.dialog_uploading_file, fileName))
-        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL)
-        mProgressDialog.setCancelable(true)
-        mProgressDialog.setOnCancelListener { mCancelled = true }
-        mProgressDialog.isIndeterminate = true
-        mProgressDialog.show()
-    }
-
-    private fun onProgress(observer: BlockPusher.FileUploadObserver) {
-        mainHandler.post {
-            mProgressDialog.isIndeterminate = false
-            mProgressDialog.max = observer.dataSource.size.toInt()
-            mProgressDialog.progress = (observer.progress * observer.dataSource.size).toInt()
-        }
-    }
-
-    private fun onComplete() {
-        mProgressDialog.dismiss()
-        if (mCancelled)
-            return
-
-        Log.i(TAG, "Uploaded file $fileName to folder $syncthingFolder:$syncthingPath")
-        mainHandler.post {
-            Toast.makeText(context, R.string.toast_upload_complete, Toast.LENGTH_SHORT).show()
-            onUploadCompleteListener()
-        }
-    }
-
-    private fun onError() {
-        mProgressDialog.dismiss()
-        mainHandler.post { Toast.makeText(context, R.string.toast_file_upload_failed, Toast.LENGTH_SHORT).show() }
-    }
-}

app/src/main/kotlin/net/syncthing/lite/utils/Util.kt

@@ -3,18 +3,25 @@ package net.syncthing.lite.utils
 import android.content.Context
 import android.net.Uri
 import android.os.Build
-import android.provider.MediaStore
-import android.util.Log
-import com.google.common.base.Objects.equal
-import com.google.common.base.Strings.nullToEmpty
+import android.provider.OpenableColumns
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import net.syncthing.java.core.beans.DeviceId
+import net.syncthing.java.core.beans.DeviceInfo
+import net.syncthing.lite.R
+import net.syncthing.lite.library.LibraryHandler
 import org.apache.commons.lang3.StringUtils.capitalize
-import java.io.File
+import org.jetbrains.anko.toast
+import java.io.IOException
+import java.security.InvalidParameterException
+import java.util.*
 
 object Util {
 
     fun getDeviceName(): String {
-        val manufacturer = nullToEmpty(Build.MANUFACTURER)
-        val model = nullToEmpty(Build.MODEL)
+        val manufacturer = Build.MANUFACTURER ?: ""
+        val model = Build.MODEL ?: ""
         val deviceName =
             if (model.startsWith(manufacturer)) {
                 capitalize(model)
@@ -22,19 +29,35 @@ object Util {
                 capitalize(manufacturer) + " " + model
             }
         return deviceName ?: "android"
-        }
+    }
 
-    fun getContentFileName(context: Context, contentUri: Uri): String {
-        var fileName = File(contentUri.lastPathSegment).name
-        if (equal(contentUri.scheme, "content")) {
-            context.contentResolver.query(contentUri, arrayOf(MediaStore.Images.Media.DATA), null, null, null)!!.use { cursor ->
-                val columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)
-                cursor.moveToFirst()
-                val path = cursor.getString(columnIndex)
-                Log.d("Main", "recovered 'content' uri real path = " + path)
-                fileName = File(Uri.parse(path).lastPathSegment).name
+    fun getContentFileName(context: Context, uri: Uri): String {
+        context.contentResolver.query(uri, null, null, null, null, null).use { cursor ->
+            if (cursor == null || !cursor.moveToFirst()) {
+                throw InvalidParameterException("Cursor is null or empty")
+            }
+            return cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
+        }
+    }
+
+    @Throws(IOException::class)
+    fun importDeviceId(libraryHandler: LibraryHandler?, context: Context?, deviceId: String,
+                       onComplete: () -> Unit) {
+        val deviceId2 = DeviceId(deviceId.toUpperCase(Locale.US))
+        libraryHandler?.library { configuration, syncthingClient, _ ->
+            if (!configuration.peerIds.contains(deviceId2)) {
+                configuration.peers = configuration.peers + DeviceInfo(deviceId2, null)
+                configuration.persistLater()
+                syncthingClient.connectToNewlyAddedDevices()
+                GlobalScope.launch (Dispatchers.Main) {
+                    context?.toast(context.getString(R.string.device_import_success, deviceId2.shortId))
+                    onComplete()
+                }
+            } else {
+                GlobalScope.launch (Dispatchers.Main) {
+                    context?.toast(context.getString(R.string.device_already_known, deviceId2.shortId))
+                }
             }
         }
-        return fileName
     }
 }

app/src/main/play/contactEmail

@@ -0,0 +1 @@
+googleplay@nutomic.com

app/src/main/play/contactWebsite

@@ -0,0 +1 @@
+https://syncthing.net

app/src/main/play/defaultLanguage

@@ -0,0 +1 @@
+en-GB

app/src/main/play/en-GB/listing/fulldescription

@@ -0,0 +1,5 @@
+This project is an Android app, that works as a client for a Syncthing share (accessing Syncthing devices in the same way a client-server file sharing app access its proprietary server).
+
+This is a client-oriented implementation, designed to work online by downloading and uploading files from an active device on the network (instead of synchronizing a local copy of the entire repository). This is quite different from the way the syncthing-android works, and its useful from those devices that cannot or wish not to download the entire repository (for example, mobile devices with limited storage available, wishing to access a syncthing share).
+
+Source code: https://github.com/syncthing/syncthing-lite

app/src/main/play/en-GB/listing/shortdescription

@@ -0,0 +1 @@
+A browser app for Syncthing-compatible shares

app/src/main/play/en-GB/listing/title

@@ -0,0 +1 @@
+Syncthing Lite

app/src/main/play/en-GB/whatsnew

@@ -0,0 +1 @@
+- fix crash after launch in release builds

app/src/main/res/drawable/ic_content_copy_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M16,1L4,1c-1.1,0 -2,0.9 -2,2v14h2L4,3h12L16,1zM19,5L8,5c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h11c1.1,0 2,-0.9 2,-2L21,7c0,-1.1 -0.9,-2 -2,-2zM19,21L8,21L8,7h11v14z"/>
+</vector>

app/src/main/res/drawable/ic_edit_white_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M3,17.25V21h3.75L17.81,9.94l-3.75,-3.75L3,17.25zM20.71,7.04c0.39,-0.39 0.39,-1.02 0,-1.41l-2.34,-2.34c-0.39,-0.39 -1.02,-0.39 -1.41,0l-1.83,1.83 3.75,3.75 1.83,-1.83z"/>
-</vector>

app/src/main/res/drawable/ic_power_settings_new_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M13,3h-2v10h2L13,3zM17.83,5.17l-1.42,1.42C17.99,7.86 19,9.81 19,12c0,3.87 -3.13,7 -7,7s-7,-3.13 -7,-7c0,-2.19 1.01,-4.14 2.58,-5.42L6.17,5.17C4.23,6.82 3,9.26 3,12c0,4.97 4.03,9 9,9s9,-4.03 9,-9c0,-2.74 -1.23,-5.18 -3.17,-6.83z"/>
+</vector>

app/src/main/res/drawable/ic_qr_code_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M3,11H5V13H3V11M11,5H13V9H11V5M9,11H13V15H11V13H9V11M15,11H17V13H19V11H21V13H19V15H21V19H19V21H17V19H13V21H11V17H15V15H17V13H15V11M19,19V15H17V19H19M15,3H21V9H15V3M17,5V7H19V5H17M3,3H9V9H3V3M5,5V7H7V5H5M3,15H9V21H3V15M5,17V19H7V17H5Z"/>
+</vector>

app/src/main/res/drawable/ic_refresh_gray_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#7D000000"
-        android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z"/>
-</vector>

app/src/main/res/drawable/ic_save_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M17,3L5,3c-1.11,0 -2,0.9 -2,2v14c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2L21,7l-4,-4zM12,19c-1.66,0 -3,-1.34 -3,-3s1.34,-3 3,-3 3,1.34 3,3 -1.34,3 -3,3zM15,9L5,9L5,5h10v4z"/>
+</vector>

app/src/main/res/drawable/ic_settings_gray_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#7D000000"
+        android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98s-0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,-0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.12,-0.22 -0.39,-0.3 -0.61,-0.22l-2.49,1c-0.52,-0.4 -1.08,-0.73 -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25 -1.17,0.59 -1.69,0.98l-2.49,-1c-0.23,-0.09 -0.49,0 -0.61,0.22l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98s0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42 -0.12,0.64l2,3.46c0.12,0.22 0.39,0.3 0.61,0.22l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24 0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.23,0.09 0.49,0 0.61,-0.22l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM12,15.5c-1.93,0 -3.5,-1.57 -3.5,-3.5s1.57,-3.5 3.5,-3.5 3.5,1.57 3.5,3.5 -1.57,3.5 -3.5,3.5z"/>
+</vector>

app/src/main/res/drawable/ic_share_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>

app/src/main/res/layout/activity_folder_browser.xml

@@ -2,82 +2,43 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <data>
+        <variable
+            name="isLoading"
+            type="Boolean" />
+
+        <import type="android.view.View" />
+    </data>
+
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <!--center content BEGIN-->
-            <LinearLayout
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:orientation="vertical"
-                android:divider="?android:listDivider"
-                android:showDividers="middle">
+        <android.support.v7.widget.RecyclerView
+            android:visibility="@{safeUnbox(isLoading) ? View.GONE : View.VISIBLE}"
+            app:layoutManager="android.support.v7.widget.LinearLayoutManager"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:id="@+id/list_view" />
 
-                <!--index loading progress BEGIN-->
-                <LinearLayout
-                    android:layout_width="match_parent"
-                    android:layout_height="40dp"
-                    android:padding="8dp"
-                    android:id="@+id/main_index_progress_bar"
-                    android:orientation="horizontal"
-                    android:background="@color/primary"
-                    android:visibility="gone">
-                    <ProgressBar
-                        android:layout_width="wrap_content"
-                        android:layout_height="match_parent"
-                        android:indeterminate="true"
-                        android:paddingStart="12dp"/>
-                    <TextView
-                        android:id="@+id/main_index_progress_bar_label"
-                        android:layout_width="0dp"
-                        android:layout_weight="1"
-                        android:layout_height="match_parent"
-                        android:textSize="18sp"
-                        android:textColor="@color/white_on_primary"
-                        android:text="@string/index_update_progress_message"
-                        android:layout_gravity="start"
-                        android:textAlignment="gravity"
-                        />
-                </LinearLayout>
-                <!--index loading progress END-->
+        <ProgressBar
+            android:visibility="@{safeUnbox(isLoading) ? View.VISIBLE : View.GONE}"
+            android:layout_centerInParent="true"
+            android:id="@+id/progress_bar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" />
 
-                <!--main list view BEGIN-->
-                <ListView
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:layout_weight="1"
-                    android:id="@+id/main_folder_and_files_list_view"
-                    android:divider="@color/divider"
-                    android:dividerHeight="2dp">
-                </ListView>
-                <TextView
-                    android:id="@+id/main_list_view_empty_element"
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:layout_weight="1"
-                    android:textAlignment="center"
-                    android:text="@string/folder_list_empty_message"
-                    android:textSize="20sp"
-                    android:visibility="gone" />
-                <!--main list view END-->
-
-            </LinearLayout>
-        <!--center content END-->
-
-        <!--upload here overlay button BEGIN-->
-            <android.support.design.widget.FloatingActionButton
-                android:id="@+id/main_list_view_upload_here_button"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginEnd="24dp"
-                android:layout_marginBottom="24dp"
-                android:layout_alignParentEnd="true"
-                android:layout_alignParentBottom="true"
-                app:elevation="6dp"
-                app:pressedTranslationZ="12dp"
-                android:src="@drawable/ic_file_upload_white_24dp"/>
-        <!--upload here overlay button END-->
+        <android.support.design.widget.FloatingActionButton
+            android:id="@+id/main_list_view_upload_here_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="24dp"
+            android:layout_marginBottom="24dp"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentBottom="true"
+            app:elevation="6dp"
+            app:pressedTranslationZ="12dp"
+            android:src="@drawable/ic_file_upload_white_24dp"/>
 
     </RelativeLayout>
 

app/src/main/res/layout/activity_main.xml

@@ -5,40 +5,12 @@
         android:id="@+id/drawer_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
-        <!-- The main content view -->
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="40dp"
-            android:padding="8dp"
-            android:id="@+id/main_index_progress_bar"
-            android:orientation="horizontal"
-            android:background="@color/primary"
-            android:visibility="gone">
-            <ProgressBar
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:indeterminate="true"
-                android:paddingStart="12dp"
-                android:paddingEnd="12dp"/>
-            <TextView
-                android:id="@+id/main_index_progress_bar_label"
-                android:layout_width="0dp"
-                android:layout_weight="1"
-                android:layout_height="match_parent"
-                android:textSize="18sp"
-                android:textColor="@color/white_on_primary"
-                android:text="@string/index_update_progress_message"
-                android:layout_gravity="start"
-                android:textAlignment="gravity"
-                />
-        </LinearLayout>
 
         <FrameLayout
             android:id="@+id/content_frame"
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
-        <!-- The navigation drawer -->
+
         <android.support.design.widget.NavigationView
             android:id="@+id/navigation"
             android:layout_width="wrap_content"
@@ -46,6 +18,7 @@
             android:layout_gravity="start"
             android:background="@android:color/white"
             app:menu="@menu/drawer_view" />
+
     </android.support.v4.widget.DrawerLayout>
 
 </layout>

app/src/main/res/layout/dialog_device_id.xml

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <ScrollView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+
+        <LinearLayout
+            android:orientation="vertical"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_margin="12dp">
+
+            <LinearLayout
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/device_id"
+                    android:layout_height="wrap_content"
+                    android:layout_width="0dp"
+                    android:layout_weight="1"
+                    android:padding="8dp"
+                    android:clickable="true"
+                    android:drawableEnd="@drawable/ic_content_copy_black_24dp"
+                    android:focusable="true"
+                    android:fontFamily="monospace"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Caption"
+                    tools:text="ASD1ASD-ASD1ASD-ASD1ASD-ASD1ASD-ASD1ASD-ASD1ASD-ASD1ASD-ASD1ASD"/>
+
+                <TextView
+                    android:id="@+id/share"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center"
+                    android:padding="8dp"
+                    android:drawableEnd="@drawable/ic_share_black_24dp"
+                    android:clickable="true"
+                    android:focusable="true" />
+
+            </LinearLayout>
+
+            <ViewFlipper
+                android:id="@+id/flipper"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <RelativeLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent">
+
+                    <ProgressBar
+                        android:layout_centerInParent="true"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"/>
+
+                </RelativeLayout>
+
+                <ImageView
+                    android:id="@+id/qr_code"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:scaleType="fitCenter" />
+
+            </ViewFlipper>
+
+        </LinearLayout>
+
+    </ScrollView>
+
+</layout>

app/src/main/res/layout/dialog_file.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+        <variable
+            name="filename"
+            type="String" />
+    </data>
+
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:padding="8dp"
+            android:textAppearance="?android:textAppearanceMedium"
+            android:text="@{filename}"
+            tools:text="Filename.type"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <Button
+            android:drawableStart="@drawable/ic_save_black_24dp"
+            android:id="@+id/save_as_button"
+            android:padding="8dp"
+            android:gravity="start|center_vertical"
+            android:text="@string/dialog_file_save_as"
+            android:background="?selectableItemBackground"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+    </LinearLayout>
+</layout>

app/src/main/res/layout/dialog_loading.xml

@@ -4,27 +4,20 @@
     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:padding="@dimen/abc_action_bar_content_inset_material"
+        android:padding="24dp"
         android:theme="?alertDialogTheme"
-        android:orientation="vertical">
+        android:orientation="horizontal"
+        android:gravity="center">
 
-        <LinearLayout
-            android:layout_width="match_parent"
+        <ProgressBar
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:orientation="horizontal"
-            android:gravity="center">
+            android:layout_marginEnd="24dp" />
 
-            <ProgressBar
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginEnd="@dimen/abc_action_bar_content_inset_material" />
-
-            <TextView
-                android:id="@+id/loading_text"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
-
-        </LinearLayout>
+        <TextView
+            android:id="@+id/loading_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
 
     </LinearLayout>
 

app/src/main/res/layout/fragment_devices.xml

@@ -2,32 +2,44 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <data>
+        <variable
+            name="isEmpty"
+            type="Boolean" />
+
+        <import type="android.view.View" />
+    </data>
+
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-            <ListView
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:id="@+id/list"
-                android:divider="@color/divider"
-                android:dividerHeight="2dp">
-            </ListView>
-            <TextView
-                android:id="@+id/empty"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_centerInParent="true"
-                android:text="@string/devices_list_view_empty_message"
-                android:textSize="20sp"
-                android:visibility="gone" />
-
-        <uk.co.markormesher.android_fab.FloatingActionButton
-            android:id="@+id/fab"
+        <android.support.v7.widget.RecyclerView
+            app:layoutManager="android.support.v7.widget.LinearLayoutManager"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            app:buttonIcon="@drawable/ic_add_white_24dp"
-            app:buttonBackgroundColour="@color/accent"/>
+            android:id="@+id/list"
+            android:divider="@color/divider"
+            android:dividerHeight="2dp">
+        </android.support.v7.widget.RecyclerView>
+
+        <TextView
+            android:id="@+id/empty"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerInParent="true"
+            android:text="@string/devices_list_view_empty_message"
+            android:textSize="20sp"
+            android:visibility="@{safeUnbox(isEmpty) ? View.VISIBLE : View.GONE}" />
+
+        <android.support.design.widget.FloatingActionButton
+            android:id="@+id/add_device"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:layout_alignParentEnd="true"
+            app:useCompatPadding="true"
+            android:src="@drawable/ic_add_white_24dp" />
 
     </RelativeLayout>
 

app/src/main/res/layout/fragment_folders.xml

@@ -2,26 +2,69 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
-    <FrameLayout
+    <data>
+        <variable
+            name="isEmpty"
+            type="Boolean" />
+
+        <import type="android.view.View" />
+
+        <variable
+            name="listeningPortTaken"
+            type="Boolean" />
+    </data>
+
+    <LinearLayout
+        android:orientation="vertical"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <ListView
+        <FrameLayout
+            android:layout_weight="1"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:id="@+id/list"
-            android:divider="@color/divider"
-            android:dividerHeight="2dp">
-        </ListView>
-        <TextView
-            android:id="@+id/empty"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            android:text="@string/folder_list_empty_message"
-            android:textSize="20sp"
-            android:visibility="gone" />
+            android:layout_height="0dp">
 
-    </FrameLayout>
+            <android.support.v7.widget.RecyclerView
+                app:layoutManager="android.support.v7.widget.LinearLayoutManager"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:id="@+id/list"
+                android:visibility="@{safeUnbox(isEmpty) ? View.GONE : View.VISIBLE}" />
 
-</layout>
+            <TextView
+                android:id="@+id/empty"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:text="@string/folder_list_empty_message"
+                android:textSize="20sp"
+                android:visibility="@{safeUnbox(isEmpty) ? View.VISIBLE : View.GONE}" />
+
+        </FrameLayout>
+
+        <LinearLayout
+            android:theme="@style/ThemeOverlay.AppCompat.Dark"
+            android:background="?colorPrimary"
+            android:visibility="@{safeUnbox(listeningPortTaken) ? View.VISIBLE : View.GONE}"
+            android:padding="8dp"
+            android:orientation="vertical"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <TextView
+                android:textAppearance="?android:textAppearanceMedium"
+                android:text="@string/other_syncthing_instance_title"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+
+            <TextView
+                android:textAppearance="?android:textAppearanceSmall"
+                android:text="@string/other_syncthing_instance_message"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+</layout>

app/src/main/res/layout/fragment_intro_one.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <data>
+        <variable
+            name="listeningPortTaken"
+            type="Boolean" />
+
+        <import type="android.view.View" />
+    </data>
+
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/intro_primary"
+        android:padding="28dp"
+        android:gravity="center_horizontal">
+
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="24dp"
+                android:textColor="#eee"
+                android:textSize="24sp"
+                android:text="@string/intro_page_one_title"/>
+
+            <ImageView
+                android:layout_width="160dp"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:src="@mipmap/ic_launcher"/>
+
+            <TextView
+                android:id="@+id/description"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:layout_marginBottom="@dimen/appIntroBottomBarHeight"
+                android:textSize="16sp"
+                android:textAlignment="center"
+                android:textColor="#eee"
+                android:text="@string/intro_page_one_description" />
+
+        <TextView
+            android:visibility="@{safeUnbox(listeningPortTaken) ? View.VISIBLE : View.GONE}"
+            android:textAppearance="?android:textAppearanceMedium"
+            android:textColor="#eee"
+            android:text="@string/other_syncthing_instance_title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:layout_marginBottom="48dp"
+            android:visibility="@{safeUnbox(listeningPortTaken) ? View.VISIBLE : View.GONE}"
+            android:textAppearance="?android:textAppearanceSmall"
+            android:textColor="#eee"
+            android:text="@string/other_syncthing_instance_message"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+    </LinearLayout>
+
+</layout>

app/src/main/res/layout/fragment_intro_three.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/intro_primary"
+        android:padding="28dp"
+        android:gravity="center_horizontal">
+
+            <TextView
+                android:id="@+id/title"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="24dp"
+                android:textColor="#eee"
+                android:textSize="24sp"
+                android:text="@string/intro_page_three_title"/>
+
+            <ProgressBar
+                android:layout_width="72dp"
+                android:layout_height="0dp"
+                android:layout_weight="1"/>
+
+            <TextView
+                android:id="@+id/description"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:layout_marginBottom="@dimen/appIntroBottomBarHeight"
+                android:textSize="16sp"
+                android:textAlignment="center"
+                android:textColor="#eee"
+                tools:text="@string/intro_page_three_description" />
+
+    </LinearLayout>
+
+</layout>

app/src/main/res/layout/fragment_intro_two.xml

@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/intro_primary"
+        android:padding="28dp"
+        android:gravity="center_horizontal">
+
+        <TextView
+            android:id="@+id/title"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="24dp"
+            android:textColor="#eee"
+            android:textSize="24sp"
+            android:text="@string/intro_page_two_title"/>
+
+        <FrameLayout
+            android:layout_weight="1"
+            android:layout_width="match_parent"
+            android:layout_height="0dp">
+            <ScrollView
+                android:layout_gravity="center"
+                android:id="@+id/scroll"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+                <LinearLayout
+                    android:orientation="vertical"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content">
+
+                    <include
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_gravity="center"
+                        android:id="@+id/enter_device_id"
+                        layout="@layout/view_enter_device_id" />
+
+                    <LinearLayout
+                        android:id="@+id/found_devices"
+                        android:orientation="vertical"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content">
+
+                        <!--
+                            Found device ids will be put here as buttons
+
+                            This does not use an ListView or RecyclerView because this allows using
+                            wrap_content as height and because it's expected to be an small list
+                        -->
+
+                    </LinearLayout>
+
+                </LinearLayout>
+            </ScrollView>
+        </FrameLayout>
+
+        <TextView
+            android:id="@+id/description"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:layout_marginBottom="@dimen/appIntroBottomBarHeight"
+            android:textSize="16sp"
+            android:textAlignment="center"
+            android:textColor="#eee"
+            android:text="@string/intro_page_two_description" />
+
+    </LinearLayout>
+
+</layout>

app/src/main/res/layout/listview_device.xml

@@ -1,23 +1,38 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+        <variable
+            name="name"
+            type="String" />
+
+        <variable
+            name="isConnected"
+            type="Boolean" />
+    </data>
 
     <RelativeLayout
+        android:background="?selectableItemBackground"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingBottom="12dp"
-        android:paddingLeft="@dimen/abc_action_bar_content_inset_material"
-        android:paddingRight="@dimen/abc_action_bar_content_inset_material"
+        android:paddingLeft="24dp"
+        android:paddingRight="24dp"
         android:paddingTop="12dp">
 
         <ImageView
             android:id="@+id/device_icon"
             android:layout_width="32dp"
             android:layout_height="32dp"
-            android:src="@drawable/ic_laptop_green_24dp"
+            tools:src="@drawable/ic_laptop_green_24dp"
+            android:src="@{safeUnbox(isConnected) ? @drawable/ic_laptop_green_24dp : @drawable/ic_laptop_red_24dp}"
             android:layout_alignParentStart="true"
             android:layout_alignParentTop="true"/>
 
         <TextView
+            tools:text="Computer"
+            android:text="@{name}"
             android:id="@+id/device_name"
             android:layout_width="match_parent"
             android:layout_alignParentEnd="true"

app/src/main/res/layout/listview_file.xml

@@ -2,7 +2,21 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <data>
+        <variable
+            name="fileName"
+            type="String" />
+
+        <variable
+            name="fileSize"
+            type="String" />
+
+        <import type="android.view.View" />
+        <import type="android.text.TextUtils" />
+    </data>
+
     <RelativeLayout
+        android:background="?selectableItemBackground"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="8dp"
@@ -19,6 +33,8 @@
             android:layout_alignParentTop="true" />
 
         <TextView
+            tools:text="Test Directory"
+            android:text="@{fileName}"
             android:id="@+id/file_label"
             android:maxLines="1"
             android:layout_width="wrap_content"
@@ -29,7 +45,9 @@
             android:textSize="22sp" />
 
         <TextView
-            android:id="@+id/file_size"
+            android:visibility="@{TextUtils.isEmpty(fileSize) ? View.GONE : View.VISIBLE}"
+            tools:text="250 MB"
+            android:text="@{fileSize}"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ellipsize="end"

app/src/main/res/layout/listview_folder.xml

@@ -1,48 +1,78 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <data>
+        <variable
+            name="folderName"
+            type="String" />
 
-    <RelativeLayout
+        <variable
+            name="lastModification"
+            type="String" />
+
+        <variable
+            name="info"
+            type="String" />
+
+        <variable
+            name="info2"
+            type="String" />
+
+        <import type="android.view.View" />
+        <import type="android.text.TextUtils" />
+    </data>
+
+    <LinearLayout
+        android:orientation="vertical"
+        android:background="?selectableItemBackground"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingBottom="12dp"
-        android:paddingLeft="@dimen/abc_action_bar_content_inset_material"
-        android:paddingRight="@dimen/abc_action_bar_content_inset_material"
+        android:paddingLeft="24dp"
+        android:paddingRight="24dp"
         android:paddingTop="12dp">
 
         <TextView
-            android:id="@+id/folder_name"
+            tools:text="Music"
+            android:text="@{folderName}"
+            android:id="@+id/folder_name_view"
             android:layout_width="match_parent"
-            android:layout_alignParentEnd="true"
             android:layout_height="wrap_content"
             android:ellipsize="end"
             android:maxLines="1"
-            android:layout_alignParentTop="true"
-            android:gravity="top"
-            android:textAlignment="gravity"
             android:textSize="20sp"
             android:textStyle="bold"/>
 
         <TextView
+            tools:text="Last modified: two minutes ago"
+            android:text="@{lastModification}"
             android:id="@+id/folder_lastmod_info"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ellipsize="end"
             android:maxLines="1"
-            android:layout_below="@id/folder_name"
-            android:textSize="14sp"
-            android:layout_alignParentStart="true" />
+            android:textSize="14sp" />
 
         <TextView
+            tools:text="Additional information"
+            android:text="@{info}"
             android:id="@+id/folder_content_info"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ellipsize="end"
             android:maxLines="1"
-            android:layout_below="@id/folder_lastmod_info"
-            android:textSize="14sp"
-            android:layout_alignParentStart="true"  />
+            android:textSize="14sp" />
 
+        <TextView
+            android:visibility="@{TextUtils.isEmpty(info2) ? View.GONE : View.VISIBLE}"
+            tools:text="Index Update Progress"
+            android:text="@{info2}"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textSize="14sp" />
 
-    </RelativeLayout>
+    </LinearLayout>
 
-</layout>
+</layout>

app/src/main/res/layout/view_enter_device_id.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingStart="16dp"
+        android:paddingEnd="16dp">
+
+        <android.support.design.widget.TextInputLayout
+            android:id="@+id/device_id_holder"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            app:errorEnabled="true">
+
+            <android.support.design.widget.TextInputEditText
+                android:id="@+id/device_id"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minLines="3"
+                android:inputType="textNoSuggestions|textMultiLine|textCapCharacters"
+                tools:text="VPNPKMK-VL2SOQN-SS5I2AB-G4BV7ZK-RO5ODEE-Y2G3CZ4-C4FUW4P-ZEMJOAF"/>
+
+        </android.support.design.widget.TextInputLayout>
+
+        <ImageButton
+            android:id="@+id/scan_qr_code"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_gravity="center"
+            android:padding="8dp"
+            android:layout_marginBottom="8dp"
+            android:scaleType="fitCenter"
+            android:src="@drawable/ic_qr_code_black_24dp"
+            android:background="?android:selectableItemBackgroundBorderless"/>
+
+    </LinearLayout>
+</layout>

app/src/main/res/menu/drawer_view.xml

@@ -4,20 +4,25 @@
 
         <item
             android:id="@+id/folders"
+            android:checked="true"
             android:icon="@drawable/ic_folder_gray_24dp"
-            android:title="Folders"
-            android:checked="true"/>
+            android:title="@string/folders_label" />
 
         <item
             android:id="@+id/devices"
             android:icon="@drawable/ic_laptop_gray_24dp"
-            android:title="Devices" />
+            android:title="@string/devices_label" />
 
         <item
-            android:id="@+id/update_index"
-            android:icon="@drawable/ic_refresh_gray_24dp"
-            android:title="@string/update_remote_index_label"
-            android:checkable="false"/>
+            android:id="@+id/settings"
+            android:icon="@drawable/ic_settings_gray_24dp"
+            android:title="@string/settings" />
+
+        <item
+            android:id="@+id/device_id"
+            android:icon="@drawable/ic_qr_code_black_24dp"
+            android:title="@string/show_device_id"
+            android:checkable="false" />
 
         <item
             android:id="@+id/clear_index"

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+	<background android:drawable="@mipmap/ic_background"/>
+	<foreground android:drawable="@mipmap/ic_foreground"/>
+</adaptive-icon>

app/src/main/res/values-de/strings.xml

@@ -0,0 +1,44 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Kein Ordner verfügbar</string>
+    <string name="clear_local_cache_index_label">Lokalen Index und Cache löschen</string>
+    <string name="devices_list_view_empty_message">Keine Geräte verfügbar</string>
+    <string name="invalid_device_id">Fehler: Ungültige Geräte ID</string>
+    <string name="dialog_downloading_file">Datei %1$s wird heruntergeladen</string>
+    <string name="toast_file_download_failed">Datei konnte nicht heruntergeladen werden</string>
+    <string name="toast_open_file_failed">Keine kompatible app gefunden</string>
+    <string name="toast_file_upload_failed">Hochladen gescheitert</string>
+    <string name="toast_upload_complete">Hochladen erfolgreich</string>
+    <string name="dialog_uploading_file">Datei %1$s wird hochgeladen</string>
+    <string name="clear_cache_and_index_title">Lokalen Cache und Index löschen?</string>
+    <string name="clear_cache_and_index_body">Gesamten lokalen Cache und Index löschen?</string>
+    <string name="index_update_progress_label">Index Aktualisierung für Ordner %1$s, %2$d %% synchronisiert</string>
+    <string name="loading_config_starting_syncthing_client">Konfiguartion wird geladen, Syncthing wird gestartet...</string>
+    <string name="last_modified_time">Zuletzt modifiziert: %1$s</string>
+    <string name="remove_device_title">Gerät %1$s entfernen?</string>
+    <string name="remove_device_message">Gerät %1$s von der Liste der bekannten Geräte entfernen?</string>
+    <string name="device_import_success">Gerät %1$s erfolgreich importiert</string>
+    <string name="device_already_known">Gerät ist bereits bekannt $1%s</string>
+    <string name="folders_label">Ordner</string>
+    <string name="devices_label">Geräte</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d Dateien, %3$d Ordner</string>
+    <string name="file_info">%1$s, zuletzt modifiziert %2$s</string>
+    <string name="show_device_id">Geräte ID anzeigen</string>
+    <string name="device_id">Geräte ID</string>
+    <string name="device_id_copied">Geräte ID in den Zwischenspeicher kopiert</string>
+    <string name="share_device_id_chooser">Teile Geräte ID mit</string>
+    <string name="other_syncthing_instance_title">Eine andere Syncthing Instanz läuft bereits</string>
+    <string name="other_syncthing_instance_message">Lokale Auffindung wird nicht funktionieren. Stoppen Sie die andere Syncthing Instanz, um die lokale Auffindung zu ermöglichen.</string>
+    <string name="intro_page_one_title">Willkommen zu Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing ersetzt proprietäre Sync- und Cloud-Services durch etwas Offenes, Vertrauenswürdiges und Dezentrales. Ihre Daten sind allein Ihre Daten, und Sie verdienen es zu wählen, wo sie gespeichert werden, ob sie an Dritte weitergegeben werden und wie sie über das Internet übertragen werden.</string>
+    <string name="intro_page_two_title">Ein Gerät hinzufügen</string>
+    <string name="intro_page_three_title">Ordner teilen</string>
+    <string name="intro_page_two_description">Eine Syncthing Geräte ID eingeben oder QR Code einer Geräte ID scannen.</string>
+    <string name="intro_page_three_description">Akzeptieren Sie nun das Gerät mit der ID %1$s und geben Sie einen Ordner mit ihm frei. Es kann einige Minuten dauern, bis sich die Geräte verbinden.</string>
+    <string name="settings">Einstellungen</string>
+    <string name="settings_app_version_title">App Version</string>
+    <string name="settings_local_device_name">Lokaler Geräte Namen</string>
+    <string name="settings_local_device_summary">Name, den das andere Gerät für dieses Gerät sehen wird</string>
+    <string name="device_id_dialog_title">Geräte ID eingeben</string>
+    </resources>

app/src/main/res/values-es/strings.xml

@@ -0,0 +1,52 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Carpeta no disponible</string>
+    <string name="clear_local_cache_index_label">Limpia caché/índice local</string>
+    <string name="devices_list_view_empty_message">Dispositivos no disponibles</string>
+    <string name="invalid_device_id">Error: identificador de dispositivo inválido</string>
+    <string name="dialog_downloading_file">Descargando archivo%1$s</string>
+    <string name="toast_file_download_failed">Falló al descargar el archivo</string>
+    <string name="toast_open_file_failed">No se ha encontrado una app compatible</string>
+    <string name="toast_file_upload_failed">Error en la carga de archivos
+</string>
+    <string name="toast_upload_complete">Carga de archivos completa
+</string>
+    <string name="dialog_uploading_file">Cargando archivo %1$s</string>
+    <string name="clear_cache_and_index_title">¿Borrar la caché local y el índice?</string>
+    <string name="clear_cache_and_index_body">¿Borrar todos los datos de la caché local y los datos de índice?</string>
+    <string name="index_update_progress_label">Actualización del índice de las carpetas %1$s, %2$d%% sincronizado</string>
+    <string name="loading_config_starting_syncthing_client">Cargando configuración, iniciando el cliente de sincronización....</string>
+    <string name="last_modified_time">Última modificación: %1$s</string>
+    <string name="remove_device_title">¿Quitar dispositivo %1$s?</string>
+    <string name="remove_device_message">¿Quitar dispositivo %1$s de la lista de dispositivos conocidos?</string>
+    <string name="device_import_success">Dispositivo %1$s importado con éxito</string>
+    <string name="device_already_known">Dispositivo %1$s ya está presente</string>
+    <string name="folders_label">Carpetas</string>
+    <string name="devices_label">Dispositivos</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d archivos, %3$ddirectorios</string>
+    <string name="file_info">%1$s, modificado por última vez %2$s</string>
+    <string name="show_device_id">Mostrar ID de dispositivo </string>
+    <string name="device_id">ID de dispositivo</string>
+    <string name="device_id_copied">ID de dispositivo copiado al portapapeles</string>
+    <string name="share_device_id_chooser">Compartir ID de dispositivo con</string>
+    <string name="other_syncthing_instance_title">Otra instancia de Syncthing está siendo ejecutada</string>
+    <string name="other_syncthing_instance_message">El descubrimiento local no funcionará. Detenga la otra instancia de Syncthing para habilitar la detección local.</string>
+    <string name="intro_page_one_title">Bienvenido a Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing reemplaza los servicios de sincronización y nube propietarios por algo abierto, fiable y descentralizado. Sus datos son sólo suyos y usted merece elegir dónde se almacenan, si se comparten con terceros y cómo se transmiten a través de Internet.</string>
+    <string name="intro_page_two_title">Añadir un dispositivo</string>
+    <string name="intro_page_three_title">Compartir tus carpetas</string>
+    <string name="intro_page_two_description">Introduce un ID de dispositivo de Syncthing o escanea un ID de dispositivo desde un código QR</string>
+    <string name="intro_page_three_description">Acepta ahora el dispositivo con ID %1$s, y comparte una carpeta con él. Pueden pasar unos minutos hasta que los dispositivos se conecten.</string>
+    <string name="settings">Configuración</string>
+    <string name="settings_app_version_title">Versión de la aplicación</string>
+    <string name="settings_local_device_name">Nombre del dispositivo local</string>
+    <string name="settings_local_device_summary">El nombre que otros dispositivos verán para este dispositivo</string>
+    <string name="settings_shutdown_delay_title">Retardo en el apagado</string>
+    <string name="settings_shutdown_delay_summary">Tiempo antes de apagar el cliente Syncthing después de su último uso</string>
+    <string name="device_id_dialog_title">Introducir la ID del dispositivo</string>
+    <string name="settings_shutdown_delay_10_seconds">10 segundos</string>
+    <string name="settings_shutdown_delay_30_seconds">30 segundos</string>
+    <string name="settings_shutdown_delay_1_minute">1 minuto</string>
+    <string name="settings_shutdown_delay_5_minutes">5 minutos</string>
+</resources>

app/src/main/res/values-fr/strings.xml

@@ -0,0 +1,50 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Aucun dossier disponible</string>
+    <string name="clear_local_cache_index_label">Effacer le cache et l\'index local</string>
+    <string name="devices_list_view_empty_message">Aucun appareil disponible</string>
+    <string name="invalid_device_id">Erreur: ID de l\'appareil invalide</string>
+    <string name="dialog_downloading_file">Téléchargement du fichier %1$s</string>
+    <string name="toast_file_download_failed">Le téléchargement du fichier a échoué</string>
+    <string name="toast_open_file_failed">Aucune appli compatible trouvée</string>
+    <string name="toast_file_upload_failed">Échec de l\'upload</string>
+    <string name="toast_upload_complete">Upload du fichier terminé</string>
+    <string name="dialog_uploading_file">Upload du fichier %1$s</string>
+    <string name="clear_cache_and_index_title">Effacer le cache local et l\'index?</string>
+    <string name="clear_cache_and_index_body">Effacer toutes les données du cache local et de l\'index ?</string>
+    <string name="index_update_progress_label">Mise à jour de l\'index pour le dossier %1$s, %2$d%% synchronisés</string>
+    <string name="loading_config_starting_syncthing_client">Chargement de la configuration, démarrage du client Syncthing...</string>
+    <string name="last_modified_time">Dernière modification : %1$s</string>
+    <string name="remove_device_title">Supprimer l\'appareil %1$s\?</string>
+    <string name="remove_device_message">Supprimer l\'appareil %1$s de la liste des appareil connus ?</string>
+    <string name="device_import_success">Appareil %1$s importé avec succès</string>
+    <string name="device_already_known">Appareil déjà connu %1$s</string>
+    <string name="folders_label">Dossiers</string>
+    <string name="devices_label">Appareils</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d fichiers, %3$d dossiers</string>
+    <string name="file_info">%1$s, dernière modification %2$s</string>
+    <string name="show_device_id">Afficher l\'ID de l\'appareil</string>
+    <string name="device_id">ID de l\'appareil</string>
+    <string name="device_id_copied">ID de l\'appareil copié dans le presse-papier</string>
+    <string name="share_device_id_chooser">Partager l\'ID de l\'appareil avec</string>
+    <string name="other_syncthing_instance_title">Une autre instance de Syncthing fonctionne</string>
+    <string name="other_syncthing_instance_message">La découverte locale ne fonctionnera pas. Arrêtez l\'autre instance de Syncthing pour activer la découverte locale.</string>
+    <string name="intro_page_one_title">Bienvenue dans Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing remplace les services de synchronisation et de cloud propriétaires par quelque chose d\'ouvert, fiable et décentralisé. Vos données sont uniquement vos données et vous méritez de choisir où elles sont stockées, si elles sont partagées avec des tiers et comment elles sont transmises sur Internet.</string>
+    <string name="intro_page_two_title">Ajouter un appareil</string>
+    <string name="intro_page_three_title">Partager vos dossiers</string>
+    <string name="intro_page_two_description">Entrer l\'ID Syncthing de l\'appareil, ou scanner le QR code de l\'ID d\'un appareil.</string>
+    <string name="intro_page_three_description">Maintenant, acceptez l\'appareil avec l\'ID %1$s, et partagez un dossier avec lui. Cela peut prendre quelques minutes avant que les appareils ne se connectent.</string>
+    <string name="settings">Réglages</string>
+    <string name="settings_app_version_title">Version d\'application</string>
+    <string name="settings_local_device_name">Nom local de l\'appareil</string>
+    <string name="settings_local_device_summary">Le nom que les autres appareils verront pour cet appareil</string>
+    <string name="settings_shutdown_delay_title">Délai d\'arrêt</string>
+    <string name="settings_shutdown_delay_summary">Délai avant d\'arrêter le client Syncthing après sa dernière utilisation</string>
+    <string name="device_id_dialog_title">Entrer l\'ID de l\'appareil</string>
+    <string name="settings_shutdown_delay_10_seconds">10 secondes</string>
+    <string name="settings_shutdown_delay_30_seconds">30 secondes</string>
+    <string name="settings_shutdown_delay_1_minute">1 minute</string>
+    <string name="settings_shutdown_delay_5_minutes">5 minutes</string>
+</resources>

app/src/main/res/values-hu/strings.xml

@@ -0,0 +1,50 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Nincs elérhető mappa</string>
+    <string name="clear_local_cache_index_label">Helyi gyorsítótár/index törlése</string>
+    <string name="devices_list_view_empty_message">Nincs elérhető eszköz</string>
+    <string name="invalid_device_id">Hiba: helytelen eszközazonosítő</string>
+    <string name="dialog_downloading_file">Fájl letöltése %1$s</string>
+    <string name="toast_file_download_failed">Hiba a fájl letöltése közben</string>
+    <string name="toast_open_file_failed">Nem található kompatibilis alkalmazás</string>
+    <string name="toast_file_upload_failed">Hiba fájl feltöltése közben</string>
+    <string name="toast_upload_complete">Feltöltés befejezve</string>
+    <string name="dialog_uploading_file">Fájl feltöltése: %1$s</string>
+    <string name="clear_cache_and_index_title">Törlöd a helyi gyorsítótárat és index-et?</string>
+    <string name="clear_cache_and_index_body">Törlöd az összes helyi gyorsítótár-at és index-et?</string>
+    <string name="index_update_progress_label">Index frissítés szinkronizálva a %1$s,%2$d,%% mappákhoz</string>
+    <string name="loading_config_starting_syncthing_client">Beállítások betöltése, Syncthing kliens indítása</string>
+    <string name="last_modified_time">Utolsó módosítás: %1$s</string>
+    <string name="remove_device_title">Törlöd a %1$s eszközt?</string>
+    <string name="remove_device_message">Törlöd a %1$s eszközt az ismertek listájáról?</string>
+    <string name="device_import_success">Eszköz sikeresen importálva: %1$s</string>
+    <string name="device_already_known">%1$s eszköz már hozzá van adva</string>
+    <string name="folders_label">Mappák</string>
+    <string name="devices_label">Eszközök</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d fájlok, %3$d mappák</string>
+    <string name="file_info">%1$s, utoljára módosítva %2$s</string>
+    <string name="show_device_id">Eszközazonosító megjelenítése</string>
+    <string name="device_id">Eszközazonosító</string>
+    <string name="device_id_copied">Eszközazonosító a vágólapra másolva</string>
+    <string name="share_device_id_chooser">Eszközazonosító megosztása</string>
+    <string name="other_syncthing_instance_title">Egy másik Syncthing folyamat fut</string>
+    <string name="other_syncthing_instance_message">Helyi felfedezés nem fog működni. Állítsd le a másik Syncthing folyamatot a helyi felfedezés bekapcsolásához.</string>
+    <string name="intro_page_one_title">Üdvözöllek a Syncthing Lite-ban</string>
+    <string name="intro_page_one_description">A Syncthing a zárt forrású szinkronizáló és felhő szolgáltatásokat egy nyílt, megbízható és decentralizált szoftverrel váltja fel. A te adatod csak a tiéd és te szabod meg, hogy hol tárolod, kivel osztod meg, és hogyan továbbítod az interneten.</string>
+    <string name="intro_page_two_title">Eszköz hozzáadása</string>
+    <string name="intro_page_three_title">Mappáid megosztása</string>
+    <string name="intro_page_two_description">Adj meg egy Syncthing eszközazonosítót, vagy olvasd be QR kódból</string>
+    <string name="intro_page_three_description">Fogadd el a(z) %1$s azonosítójú eszközt, és ossz meg vele egy mappát. Beletelhet néhány percbe mire az eszközök csatlakoznak.</string>
+    <string name="settings">Beállítások</string>
+    <string name="settings_app_version_title">Verzió</string>
+    <string name="settings_local_device_name">Helyi eszköz neve</string>
+    <string name="settings_local_device_summary">Név amit a többi eszköz fog látni</string>
+    <string name="settings_shutdown_delay_title">Leállítás késleltetés</string>
+    <string name="settings_shutdown_delay_summary">A Syncthing leállítása ennyi idő elteltével a kliens utolsó csatlakozása után</string>
+    <string name="device_id_dialog_title">Eszközazonosító megadása</string>
+    <string name="settings_shutdown_delay_10_seconds">10 másodperc</string>
+    <string name="settings_shutdown_delay_30_seconds">30 másodperc</string>
+    <string name="settings_shutdown_delay_1_minute">1 perc</string>
+    <string name="settings_shutdown_delay_5_minutes">5 perc</string>
+</resources>

app/src/main/res/values-it/strings.xml

@@ -0,0 +1,50 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Nessuna cartella disponibile</string>
+    <string name="clear_local_cache_index_label">Cancella cache/indice</string>
+    <string name="devices_list_view_empty_message">Nessun dispositivo disponibile</string>
+    <string name="invalid_device_id">Errore: ID dispositivo non valido</string>
+    <string name="dialog_downloading_file">Scaricamento del file %1$s</string>
+    <string name="toast_file_download_failed">Impossibile scaricare il file</string>
+    <string name="toast_open_file_failed">Nessuna applicazione compatibile trovata</string>
+    <string name="toast_file_upload_failed">Caricamento file fallito</string>
+    <string name="toast_upload_complete">Caricamento file completato</string>
+    <string name="dialog_uploading_file">Caricamento del file %1$s</string>
+    <string name="clear_cache_and_index_title">Cancellare la cache locale e l\'indice?</string>
+    <string name="clear_cache_and_index_body">Cancellare tutti i dati della cache locale e i dati dell\'indice?</string>
+    <string name="index_update_progress_label">Aggiornamento dell\'indice per la cartella %1$s, %2$d%% sincronizzato</string>
+    <string name="loading_config_starting_syncthing_client">Caricamento configurazione, avvio del client syncthing...</string>
+    <string name="last_modified_time">Ultima modifica: %1$s</string>
+    <string name="remove_device_title">Rimuovere il dispositivo %1$s\?</string>
+    <string name="remove_device_message">Rimuovere %1$s dalla lista dei dispositivi noti?</string>
+    <string name="device_import_success">Dispositivo %1$s importato con successo</string>
+    <string name="device_already_known">Dispositivo %1$s già presente</string>
+    <string name="folders_label">Cartelle</string>
+    <string name="devices_label">Dispositivi</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d file, %3$d cartelle</string>
+    <string name="file_info">%1$s, ultima modifica %2$s</string>
+    <string name="show_device_id">Mostra l\'ID del dispositivo</string>
+    <string name="device_id">ID dispositivo</string>
+    <string name="device_id_copied">ID dispositivo copiato negli appunti</string>
+    <string name="share_device_id_chooser">Condividi ID dispositivo con</string>
+    <string name="other_syncthing_instance_title">Un\'altra istanza di Syncthing è in esecuzione</string>
+    <string name="other_syncthing_instance_message">L\'individuazione locale non funzionerà. Arresta l\'altra istanza di Syncthing per abilitare l\'individuazione locale.</string>
+    <string name="intro_page_one_title">Benvenuto in Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing sostituisce servizi proprietari di sincronizzazione e cloud con qualcosa di aperto, affidabile e decentralizzato. I tuoi dati sono solo tuoi e meriti di scegliere dove vengono immagazzinati, se sono condivisi con terze parti e come sono trasmessi attraverso Internet.</string>
+    <string name="intro_page_two_title">Aggiungi un dispositivo</string>
+    <string name="intro_page_three_title">Condividi le tue cartelle</string>
+    <string name="intro_page_two_description">Immetti un ID dispositivo Syncthing o esegui la scansione di un ID dispositivo da un codice QR</string>
+    <string name="intro_page_three_description">Ora accetta il dispositivo con ID %1$s, e condividi una cartella con esso. Potrebbero essere necessari alcuni minuti prima che i dispositivi si connettano.</string>
+    <string name="settings">Impostazioni</string>
+    <string name="settings_app_version_title">Versione dell\'app</string>
+    <string name="settings_local_device_name">Nome del dispositivo locale</string>
+    <string name="settings_local_device_summary">Il nome che altri dispositivi vedranno per questo dispositivo</string>
+    <string name="settings_shutdown_delay_title">Ritardo di chiusura</string>
+    <string name="settings_shutdown_delay_summary">Tempo prima della chiusura del client Syncthing dopo l\'ultimo utilizzo</string>
+    <string name="device_id_dialog_title">Inserisci ID Dispositivo</string>
+    <string name="settings_shutdown_delay_10_seconds">10 secondi</string>
+    <string name="settings_shutdown_delay_30_seconds">30 secondi</string>
+    <string name="settings_shutdown_delay_1_minute">1 minuto</string>
+    <string name="settings_shutdown_delay_5_minutes">5 minuti</string>
+</resources>

app/src/main/res/values-ja/strings.xml

@@ -0,0 +1,44 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">フォルダーがありません</string>
+    <string name="clear_local_cache_index_label">ローカルキャッシュ/索引をクリア</string>
+    <string name="devices_list_view_empty_message">デバイスがありません</string>
+    <string name="invalid_device_id">エラー: デバイス ID が無効です</string>
+    <string name="dialog_downloading_file">ファイル %1$s のダウンロード中</string>
+    <string name="toast_file_download_failed">ファイルのダウンロードに失敗しました</string>
+    <string name="toast_open_file_failed">利用できるアプリが見つかりません</string>
+    <string name="toast_file_upload_failed">ファイルのアップロードに失敗しました</string>
+    <string name="toast_upload_complete">ファイルのアップロードが完了しました</string>
+    <string name="dialog_uploading_file">ファイル %1$s のアップロード中</string>
+    <string name="clear_cache_and_index_title">ローカルキャッシュと索引をクリアしますか?</string>
+    <string name="clear_cache_and_index_body">すべてのローカルキャッシュデータと索引データをクリアしますか?</string>
+    <string name="index_update_progress_label">フォルダー %1$s の索引を更新しました。 %2$d%% 同期しました</string>
+    <string name="loading_config_starting_syncthing_client">設定の読み込み中、syncthing クライアントの開始中…</string>
+    <string name="last_modified_time">最終更新: %1$s</string>
+    <string name="remove_device_title">デバイス %1$sを削除しますか?</string>
+    <string name="remove_device_message">既存のデバイスのリストから %1$s を削除しますか?</string>
+    <string name="device_import_success">デバイス %1$s のインポートに成功しました</string>
+    <string name="device_already_known">デバイスは既に存在します %1$s</string>
+    <string name="folders_label">フォルダー</string>
+    <string name="devices_label">デバイス</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d ファイル, %3$d ディレクトリー</string>
+    <string name="file_info">%1$s, 最終更新 %2$s</string>
+    <string name="show_device_id">デバイス ID を表示</string>
+    <string name="device_id">デバイス ID</string>
+    <string name="device_id_copied">デバイス ID をクリップボードにコピーしました</string>
+    <string name="share_device_id_chooser">次とデバイス ID を共有</string>
+    <string name="other_syncthing_instance_title">別の Syncthing インスタンスが実行中です</string>
+    <string name="other_syncthing_instance_message">ローカルの探索は動作しません。他の Syncthing インスタンスを停止して、ローカルの探索を有効にしてください。</string>
+    <string name="intro_page_one_title">Syncthing Lite へようこそ</string>
+    <string name="intro_page_one_description">Syncthing は、プロプライエタリな同期およびクラウドサービスを、オープンで信頼性があり、分散化されたものに置き換えます。 あなたのデータはあなただけのものであり、それが第三者と共有され、インターネット経由で送信される場合、保存される場所を選択する必要があります。</string>
+    <string name="intro_page_two_title">デバイスを追加</string>
+    <string name="intro_page_three_title">フォルダーを共有</string>
+    <string name="intro_page_two_description">Syncthing デバイス ID を入力、または QR コードからデバイス ID をスキャンしてください</string>
+    <string name="intro_page_three_description">ID %1$s のデバイスを承認して、フォルダーを共有しました。デバイスが接続されるまで数分かかることがあります。</string>
+    <string name="settings">設定</string>
+    <string name="settings_app_version_title">アプリバージョン</string>
+    <string name="settings_local_device_name">ローカルのデバイス名</string>
+    <string name="settings_local_device_summary">他のデバイスがこのデバイスを表示する名前</string>
+    <string name="device_id_dialog_title">デバイス ID を入力</string>
+    </resources>

app/src/main/res/values-nl-rBE/strings.xml

@@ -0,0 +1,44 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Geen map beschikbaar</string>
+    <string name="clear_local_cache_index_label">Lokaal cachegeheugen/index wissen</string>
+    <string name="devices_list_view_empty_message">Geen apparaten beschikbaar</string>
+    <string name="invalid_device_id">Fout: ongeldigen apparaats-ID</string>
+    <string name="dialog_downloading_file">Bestand %1$s wordt gedownload</string>
+    <string name="toast_file_download_failed">Download van bestand mislukt</string>
+    <string name="toast_open_file_failed">Gene compatibelen app gevonden</string>
+    <string name="toast_file_upload_failed">Uploaden van bestand mislukt</string>
+    <string name="toast_upload_complete">Uploaden van bestand voltooid</string>
+    <string name="dialog_uploading_file">Bestand %1$s wordt geüpload</string>
+    <string name="clear_cache_and_index_title">Lokaal cachegeheugen en index wissen?</string>
+    <string name="clear_cache_and_index_body">Alle lokale cache- en indexgegevens wissen?</string>
+    <string name="index_update_progress_label">Index voor map %1$s wordt bijgewerkt, %2$d%% gesynchroniseerd</string>
+    <string name="loading_config_starting_syncthing_client">Configuratie wordt geladen, Syncthing-cliënt wordt opgestart…</string>
+    <string name="last_modified_time">Laatst gewijzigd: %1$s</string>
+    <string name="remove_device_title">Apparaat %1$s verwijderen?</string>
+    <string name="remove_device_message">%1$s verwijderen uit de lijst van gekende apparaten?</string>
+    <string name="device_import_success">Apparaat %1$s geïmporteerd</string>
+    <string name="device_already_known">Apparaat %1$s reeds aanwezig</string>
+    <string name="folders_label">Mappen</string>
+    <string name="devices_label">Apparaten</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d bestanden, %3$d mappen</string>
+    <string name="file_info">%1$s, laatst gewijzigd %2$s</string>
+    <string name="show_device_id">Apparaats-ID tonen</string>
+    <string name="device_id">Apparaats-ID</string>
+    <string name="device_id_copied">Apparaats-ID gekopieerd naar klembord</string>
+    <string name="share_device_id_chooser">Apparaats-ID delen met</string>
+    <string name="other_syncthing_instance_title">Een andere Syncthing-instantie wordt reeds uitgevoerd</string>
+    <string name="other_syncthing_instance_message">Lokale ontdekking gaat niet werken. Stopt de andere Syncthing-instantie voor lokale ontdekking in te schakelen.</string>
+    <string name="intro_page_one_title">Welkom bij Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing vervangt niet-vrije synchronisatie- en clouddiensten door iets opens, betrouwbaars en gedecentraliseerds. Uw gegevens behoren enkel u toe en gij bepaalt waar dat ze worden opgeslagen, of dat ze worden gedeeld met een derde partij en hoe dat ze over het internet worden verzonden.</string>
+    <string name="intro_page_two_title">Voegt een apparaat toe</string>
+    <string name="intro_page_three_title">Deelt uw mappen</string>
+    <string name="intro_page_two_description">Voert ne Syncthing-apparaats-ID in, of scant nen apparaats-ID van een QR-code</string>
+    <string name="intro_page_three_description">Aanvaard nu het apparaat met ID %1$s, en deelt er een map mee. Het kan enkele minuten duren vooraleer dat de apparaten verbinding maken.</string>
+    <string name="settings">Instellingen</string>
+    <string name="settings_app_version_title">Appversie</string>
+    <string name="settings_local_device_name">Naam van lokaal apparaat</string>
+    <string name="settings_local_device_summary">De naam die dat andere apparaten voor dit apparaat gaan zien</string>
+    <string name="device_id_dialog_title">Voert nen apparaats-ID in</string>
+    </resources>

app/src/main/res/values-nl-rNL/strings.xml

@@ -0,0 +1,2 @@
+<resources>
+    </resources>

app/src/main/res/values-nl/strings.xml

@@ -0,0 +1,44 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Geen map beschikbaar</string>
+    <string name="clear_local_cache_index_label">Lokale cache/index wissen</string>
+    <string name="devices_list_view_empty_message">Geen apparaten beschikbaar</string>
+    <string name="invalid_device_id">Fout: ongeldige apparaats-ID</string>
+    <string name="dialog_downloading_file">Bestand %1$s wordt gedownload</string>
+    <string name="toast_file_download_failed">Download van bestand mislukt</string>
+    <string name="toast_open_file_failed">Geen compatibele app gevonden</string>
+    <string name="toast_file_upload_failed">Uploaden van bestand mislukt</string>
+    <string name="toast_upload_complete">Uploaden van bestand voltooid</string>
+    <string name="dialog_uploading_file">Bestand %1$s wordt geüpload</string>
+    <string name="clear_cache_and_index_title">Lokale cache en index wissen?</string>
+    <string name="clear_cache_and_index_body">Alle lokale cache- en indexgegevens wissen?</string>
+    <string name="index_update_progress_label">Index voor map %1$s wordt bijgewerkt, %2$d%% gesynchroniseerd</string>
+    <string name="loading_config_starting_syncthing_client">Configuratie wordt geladen, Syncthing-cliënt wordt opgestart…</string>
+    <string name="last_modified_time">Laatst gewijzigd: %1$s</string>
+    <string name="remove_device_title">Apparaat %1$s verwijderen?</string>
+    <string name="remove_device_message">%1$s verwijderen uit de lijst van gekende apparaten?</string>
+    <string name="device_import_success">Apparaat %1$s geïmporteerd</string>
+    <string name="device_already_known">Apparaat %1$s reeds aanwezig</string>
+    <string name="folders_label">Mappen</string>
+    <string name="devices_label">Apparaten</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d bestanden, %3$d mappen</string>
+    <string name="file_info">%1$s, laatst gewijzigd %2$s</string>
+    <string name="show_device_id">Apparaats-ID tonen</string>
+    <string name="device_id">Apparaats-ID</string>
+    <string name="device_id_copied">Apparaats-ID gekopieerd naar klembord</string>
+    <string name="share_device_id_chooser">Apparaats-ID delen met</string>
+    <string name="other_syncthing_instance_title">Een andere Syncthing-instantie wordt reeds uitgevoerd</string>
+    <string name="other_syncthing_instance_message">Lokale ontdekking zal niet werken. Stop de andere Syncthing-instantie om lokale ontdekking in te schakelen.</string>
+    <string name="intro_page_one_title">Welkom bij Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing vervangt niet-vrije synchronisatie- en clouddiensten door iets opens, betrouwbaars en gedecentraliseerds. Je gegevens behoren enkel jou toe en jij bepaalt waar ze worden opgeslagen, of ze gedeeld worden met een derde partij en hoe ze over het internet verstuurd worden.</string>
+    <string name="intro_page_two_title">Voeg een apparaat toe</string>
+    <string name="intro_page_three_title">Deel je mappen</string>
+    <string name="intro_page_two_description">Voer een Syncthing-apparaats-ID in, of scan een apparaats-ID van een QR-code</string>
+    <string name="intro_page_three_description">Accepteer nu het apparaat met ID %1$s, en deel er een map mee. Het kan enkele minuten duren voordat de apparaten verbinden.</string>
+    <string name="settings">Instellingen</string>
+    <string name="settings_app_version_title">Appversie</string>
+    <string name="settings_local_device_name">Naam van lokaal apparaat</string>
+    <string name="settings_local_device_summary">De naam die andere apparaten voor dit apparaat zullen zien</string>
+    <string name="device_id_dialog_title">Voer een apparaats-ID in</string>
+    </resources>

app/src/main/res/values-pt-rBR/strings.xml

@@ -0,0 +1,2 @@
+<resources>
+    </resources>

app/src/main/res/values-pt-rPT/strings.xml

@@ -0,0 +1,2 @@
+<resources>
+    </resources>

app/src/main/res/values-ro/strings.xml

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+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Nici un director disponibil</string>
+    <string name="clear_local_cache_index_label">Curăță indexul/memoria locală</string>
+    <string name="devices_list_view_empty_message">Nici un dispozitiv disponibil</string>
+    <string name="invalid_device_id">Eroare: ID dispozitiv invalid</string>
+    <string name="dialog_downloading_file">Se descarcă fișierul %1$s</string>
+    <string name="toast_file_download_failed">Descărcarea fișierului a eșuat</string>
+    <string name="toast_open_file_failed">Nu a fost găsită nici o aplicație compatibilă</string>
+    <string name="toast_file_upload_failed">Încărcarea fișierului a eșuat</string>
+    <string name="toast_upload_complete">Încărcarea fișierelor finalizată</string>
+    <string name="dialog_uploading_file">Se încarcă fișierul %1$s</string>
+    <string name="clear_cache_and_index_title">Se curăță memoria locală și indexul?</string>
+    <string name="clear_cache_and_index_body">Se curăță datele din memoria locală și datele indexului?</string>
+    <string name="index_update_progress_label">Actualizarea indexul pentru directorul %1$s, %2$d %% sincronizat</string>
+    <string name="loading_config_starting_syncthing_client">Încărcare setări, pornire client syncthing…</string>
+    <string name="last_modified_time">Modificat ultima dată pe: %1$s</string>
+    <string name="remove_device_title">Ștergere dispozitiv %1$s\?</string>
+    <string name="remove_device_message">Șterge %1$s din lista dispozitivelor cunoscute?</string>
+    <string name="device_import_success">Dispozitiv importat cu succes %1$s</string>
+    <string name="device_already_known">Dispozitiv deja prezent %1$s</string>
+    <string name="folders_label">Directoare</string>
+    <string name="devices_label">Dispozitive</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d fișier(e), %3$d director(oare)</string>
+    <string name="file_info">%1$s, modificat ultima dată pe %2$s</string>
+    <string name="show_device_id">Arată ID dispozitiv</string>
+    <string name="device_id">ID dispozitiv</string>
+    <string name="device_id_copied">ID dispozitiv copiat în memorie</string>
+    <string name="share_device_id_chooser">Partajează ID dispozitiv cu</string>
+    <string name="other_syncthing_instance_title">O altă instanță de Syncthing rulează</string>
+    <string name="other_syncthing_instance_message">Descoperire locală nu va funcționa. Opriți cealaltă instanță de Syncthing pentru a activa descoperirea locală.</string>
+    <string name="intro_page_one_title">Bine ați venit la Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing înlocuiește serviciile proprietare de sincronizare și stocare 
+tip cloud cu ceva deschis, de încredere și descentralizat. Datele 
+dumneavoastră vă aparțin în totalitate și meritați să decideți unde vor 
+fi stocate, dacă vor fi partajate cu terțe entități precum și cum vor fi
+ trimise prin Internet.</string>
+    <string name="intro_page_two_title">Adaugă un dispozitiv</string>
+    <string name="intro_page_three_title">Partajați-vă directoarele</string>
+    <string name="intro_page_two_description">Introduceți ID-ul Syncthing al unui dispozitiv sau scanați ID-ul unui dispozitiv dintr-un cod QR</string>
+    <string name="intro_page_three_description">Acceptați acum dispozitivul cu ID-ul %1$s, și partajați un director cu el. S-ar putea să dureze câteva minute până când dispozitivele se vor conecta.</string>
+    <string name="settings">Setări</string>
+    <string name="settings_app_version_title">Versiune aplicație</string>
+    <string name="settings_local_device_name">Nume local dispozitiv</string>
+    <string name="settings_local_device_summary">Numele pe care celălalt dispozitiv îl va vedea pentru acest dispozitiv</string>
+    <string name="settings_shutdown_delay_title">Temporizare oprire</string>
+    <string name="settings_shutdown_delay_summary">După cât timp se va închide clientul Syncthing în funcție de ultima utilizare</string>
+    <string name="device_id_dialog_title">Introduceți ID dispozitiv</string>
+    <string name="settings_shutdown_delay_10_seconds">10 secunde</string>
+    <string name="settings_shutdown_delay_30_seconds">30 secunde</string>
+    <string name="settings_shutdown_delay_1_minute">1 minut</string>
+    <string name="settings_shutdown_delay_5_minutes">5 minute</string>
+</resources>

app/src/main/res/values-sv/strings.xml

@@ -0,0 +1,50 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="folder_list_empty_message">Ingen mapp tillgänglig</string>
+    <string name="clear_local_cache_index_label">Rensa lokala cache/index</string>
+    <string name="devices_list_view_empty_message">Inga enheter tillgängliga</string>
+    <string name="invalid_device_id">Fel: Ogiltigt enhets-ID</string>
+    <string name="dialog_downloading_file">Hämtar filen %1$s</string>
+    <string name="toast_file_download_failed">Misslyckades med att hämta filen</string>
+    <string name="toast_open_file_failed">Ingen kompatibel app hittades</string>
+    <string name="toast_file_upload_failed">Filöverföring misslyckades</string>
+    <string name="toast_upload_complete">Filöverföring färdig</string>
+    <string name="dialog_uploading_file">Överför filen %1$s</string>
+    <string name="clear_cache_and_index_title">Rensa cache och index lokalt?</string>
+    <string name="clear_cache_and_index_body">Rensa all cachedata och indexdata lokalt?</string>
+    <string name="index_update_progress_label">Index uppdatering för mappen %1$s, %2$d%% synkroniserad</string>
+    <string name="loading_config_starting_syncthing_client">Läser in konfiguration, starta synkroniserande klient...</string>
+    <string name="last_modified_time">Senast ändrad: %1$s</string>
+    <string name="remove_device_title">Ta bort enheten %1$s\?</string>
+    <string name="remove_device_message">Ta bort %1$s från listan över kända enheter?</string>
+    <string name="device_import_success">Importerad enheten %1$s</string>
+    <string name="device_already_known">Enhet som redan finns %1$s</string>
+    <string name="folders_label">Mappar</string>
+    <string name="devices_label">Enheter</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d filer, %3$d kataloger</string>
+    <string name="file_info">%1$s, senast ändrad %2$s</string>
+    <string name="show_device_id">Visa enhets-ID</string>
+    <string name="device_id">Enhets-ID</string>
+    <string name="device_id_copied">Enhets-ID kopierad till urklipp</string>
+    <string name="share_device_id_chooser">Dela enhets-ID med</string>
+    <string name="other_syncthing_instance_title">En annan Syncthing-instans körs</string>
+    <string name="other_syncthing_instance_message">Lokal upptäckt kommer inte att fungera. Stoppa den andra Syncthing-instansen för att möjliggöra lokal upptäckt.</string>
+    <string name="intro_page_one_title">Välkommen till Syncthing Lite</string>
+    <string name="intro_page_one_description">Syncthing ersätter proprietära synkroniserings- och molntjänster med något öppet, pålitligt och decentraliserat. Din data är endast din data och du förtjänar att välja var den lagras, om den delas med en tredjepart och hur den överförs över Internet.</string>
+    <string name="intro_page_two_title">Lägg till en enhet</string>
+    <string name="intro_page_three_title">Dela dina mappar</string>
+    <string name="intro_page_two_description">Ange ett Syncthing enhets-ID, eller skanna ett enhets-ID-nummer från en QR-kod</string>
+    <string name="intro_page_three_description">Acceptera nu enheten med ID %1$s och dela en mapp med den. Det kan ta några minuter tills enheterna ansluter.</string>
+    <string name="settings">Inställningar</string>
+    <string name="settings_app_version_title">Appversion</string>
+    <string name="settings_local_device_name">Lokala enhetens namn</string>
+    <string name="settings_local_device_summary">Namnet som andra enheter kommer att se för den här enheten</string>
+    <string name="settings_shutdown_delay_title">Avstängningsfördröjning</string>
+    <string name="settings_shutdown_delay_summary">Tid innan du stänger av Syncthing-klienten efter den senaste användningen</string>
+    <string name="device_id_dialog_title">Ange enhets-ID</string>
+    <string name="settings_shutdown_delay_10_seconds">10 sekunder</string>
+    <string name="settings_shutdown_delay_30_seconds">30 sekunder</string>
+    <string name="settings_shutdown_delay_1_minute">1 minut</string>
+    <string name="settings_shutdown_delay_5_minutes">5 minuter</string>
+</resources>

app/src/main/res/values-tr/strings.xml

@@ -0,0 +1,2 @@
+<resources>
+    </resources>