Version 0.1.4

* externalized some strings

* externalized some more strings

* Yay! More strings externalized

* externalized strings

* translated to german

* translation finished

* fixed mistake

* fixed compile error

* externalized strings
translated said strings into german

* finishing touches

* even more finishing touches

* finishing touches

* fixed missing space

* added space

* Revert "fixed compile error"

This reverts commit 0225ce6d79.

.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

@@ -13,13 +13,20 @@ example, mobile devices with limited storage available, wishing to access a sync
 
 This project is based on [syncthing-java][3], a java implementation of Syncthing protocols.
 
+[<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-android/syncthing-lite/).
+
 ## 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`.
+To compile with a development version of the [syncthing-java][3] library, you have to install it to
+the local maven repository. To do this, clone the repo and run `gradle install` in the
+syncthing-java project folder.
 
 ## License
 All code is licensed under the [MPLv2 License][5].

app/build.gradle

@@ -1,6 +1,7 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
+apply plugin: 'com.github.ben-manes.versions'
 
 android {
     compileSdkVersion 27
@@ -10,8 +11,8 @@ android {
         applicationId "net.syncthing.lite"
         minSdkVersion 19
         targetSdkVersion 25
-        versionCode 2
-        versionName "0.1"
+        versionCode 6
+        versionName "0.1.4"
         multiDexEnabled true
     }
     sourceSets {
@@ -21,26 +22,44 @@ 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 {
+        release {
+            signingConfig signingConfigs.release
+        }
+    }
 }
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation "org.jetbrains.anko:anko-commons:$anko_version"
+    implementation "org.jetbrains.anko:anko-coroutines:$anko_version"
     kapt "com.android.databinding:compiler:$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:$support_version"
     implementation "com.android.support:design:$support_version"
     implementation "com.android.support:cardview-v7:$support_version"
-    implementation ("com.github.Nutomic:syncthing-java:0.1") {
+    implementation ("com.github.Nutomic:syncthing-java:0.1.4") {
         exclude group: 'commons-logging', module:'commons-logging'
-        exclude group: 'commons-codec'
         exclude group: 'org.apache.httpcomponents', module:'httpclient'
         exclude group: 'org.slf4j'
         exclude group: 'ch.qos.logback'
     }
+    // NOTE: httpclient-android seems to be used via reflection somehow. Removing this dependency
+    //       silently breaks the app.
     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 ('uk.co.markormesher:android-fab:2.0.0') {
+        exclude group: "org.jetbrains.kotlin"
+    }
 }

app/src/main/AndroidManifest.xml

@@ -20,15 +20,18 @@
         </activity>
         <activity android:name=".activities.FolderBrowserActivity"
             android:parentActivityName=".activities.MainActivity"/>
-        <activity
-            android:name=".activities.MIVFilePickerActivity"
-            android:label="@string/app_name"
-            android:theme="@style/FilePickerTheme">
-            <intent-filter>
-                <action android:name="android.intent.action.GET_CONTENT" />
-                <category android:name="android.intent.category.DEFAULT" />
-            </intent-filter>
-        </activity>
+        <activity android:name=".activities.FilePickerActivity"
+            android:parentActivityName=".activities.FolderBrowserActivity" />
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="net.syncthing.lite.fileprovider"
+            android:grantUriPermissions="true"
+            android:exported="false">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths" />
+        </provider>
+
     </application>
 
-</manifest>
+</manifest>

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

@@ -0,0 +1,101 @@
+package net.syncthing.lite.activities
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.os.Environment
+import android.view.View
+import android.view.ViewGroup
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.ListView
+import android.widget.TextView
+import net.syncthing.lite.R
+import java.io.File
+import java.util.*
+
+/**
+ * Activity that allows selecting a directory in the local file system.
+ */
+class FilePickerActivity : SyncthingActivity(), AdapterView.OnItemClickListener {
+
+    private lateinit var mListView: ListView
+    private lateinit var mFilesAdapter: FileAdapter
+    private lateinit var mLocation: File
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.activity_folder_picker)
+        mListView = findViewById(android.R.id.list)
+        mListView.onItemClickListener = this
+        mListView.emptyView = findViewById(android.R.id.empty)
+        mFilesAdapter = FileAdapter(this)
+        mListView.adapter = mFilesAdapter
+
+        displayFolder(Environment.getExternalStorageDirectory())
+    }
+
+    /**
+     * Refreshes the ListView to show the contents of the location in ``mLocation.peek()}.
+     */
+    private fun displayFolder(location: File) {
+        mLocation = location
+        mFilesAdapter.clear()
+        // In case we don't have read access to the location, just display nothing.
+        val contents = location.listFiles() ?: arrayOf()
+
+        Arrays.sort(contents) { f1, f2 ->
+            if (f1.isDirectory && f2.isFile)
+                return@sort -1
+            if (f1.isFile && f2.isDirectory)
+                return@sort 1
+            f1.name.compareTo(f2.name)
+        }
+
+        for (f in contents) {
+            mFilesAdapter.add(f)
+        }
+        mListView.adapter = mFilesAdapter
+    }
+
+    override fun onItemClick(adapterView: AdapterView<*>, view: View, i: Int, l: Long) {
+        val f = mFilesAdapter.getItem(i)
+        if (f!!.isDirectory) {
+            displayFolder(f)
+        } else {
+            val intent = Intent()
+            intent.data = Uri.fromFile(f)
+            setResult(Activity.RESULT_OK, intent)
+            finish()
+        }
+    }
+
+    private inner class FileAdapter(context: Context) : ArrayAdapter<File>(context, R.layout.item_folder_picker) {
+
+        override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+            val view = super.getView(position, convertView, parent)
+            val title = view.findViewById<TextView>(android.R.id.text1)
+            val f = getItem(position)!!
+            title.text = f.name
+            val icon =
+                    if (f.isDirectory) R.drawable.ic_folder_black_24dp
+                    else               R.drawable.ic_image_black_24dp
+            title.setCompoundDrawablesWithIntrinsicBounds(icon, 0, 0, 0)
+
+            return view
+        }
+    }
+
+    override fun onBackPressed() {
+        if (mLocation != Environment.getExternalStorageDirectory()) {
+            displayFolder(mLocation.parentFile)
+        } else {
+            setResult(Activity.RESULT_CANCELED)
+            finish()
+        }
+    }
+
+}

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

@@ -2,32 +2,24 @@ 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 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.databinding.ActivityFolderBrowserBinding
-import net.syncthing.lite.databinding.DialogLoadingBinding
-import net.syncthing.lite.utils.DownloadFileTask
-import net.syncthing.lite.utils.UploadFileTask
+import net.syncthing.lite.library.DownloadFileTask
+import net.syncthing.lite.library.UploadFileTask
+import org.jetbrains.anko.intentFor
 
 class FolderBrowserActivity : SyncthingActivity() {
 
@@ -35,158 +27,119 @@ class FolderBrowserActivity : SyncthingActivity() {
 
         private val TAG = "FolderBrowserActivity"
         private val REQUEST_WRITE_STORAGE = 142
+        private val REQUEST_SELECT_UPLOAD_FILE = 171
 
         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 lateinit var indexBrowser: IndexBrowser
+    private lateinit var adapter: FolderContentsAdapter
     private var runWhenPermissionsReceived: Runnable? = 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)
+        adapter = FolderContentsAdapter(this)
+        binding.listView.adapter = adapter
+        binding.listView.setOnItemClickListener { _, _, position, _ ->
+            val fileInfo = binding.listView.getItemAtPosition(position) as FileInfo
+            navigateToFolder(fileInfo)
+        }
+        val folder = intent.getStringExtra(EXTRA_FOLDER_NAME)
+        libraryHandler?.syncthingClient {
+            indexBrowser = it.indexHandler.newIndexBrowser(folder, true, true)
+            indexBrowser.setOnFolderChangedListener(this::onFolderChanged)
+        }
     }
 
     override fun onDestroy() {
         super.onDestroy()
         Thread {
-            indexBrowser?.close()
-            indexBrowser = null
+            indexBrowser.setOnFolderChangedListener(null)
+            indexBrowser.close()
         }.start()
-        cancelLoadingDialog()
     }
 
     override fun onBackPressed() {
-        val listView = binding.mainFolderAndFilesListView
+        val listView = binding.listView
         //click item '0', ie '..' (go to parent)
-        listView.performItemClick(adapter!!.getView(0, null, listView), 0, listView.getItemIdAtPosition(0))
+        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()
-        }
-    }
-
-    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()
+    override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
+        if (requestCode == REQUEST_SELECT_UPLOAD_FILE && resultCode == Activity.RESULT_OK) {
+            libraryHandler?.syncthingClient { syncthingClient ->
+                UploadFileTask(this@FolderBrowserActivity, syncthingClient, intent!!.data,
+                        indexBrowser.folder, indexBrowser.currentPath,
+                        this@FolderBrowserActivity::showUploadHereDialog).uploadFile()
             }
-            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 showFolderListView(path: String) {
+        indexBrowser.navigateToNearestPath(path)
+        navigateToFolder(indexBrowser.currentPathInfo())
     }
 
     private fun navigateToFolder(fileInfo: FileInfo) {
-        if (indexBrowser!!.isRoot && PathUtils.isParent(fileInfo.path)) {
+        Log.d(TAG, "navigate to path = '" + fileInfo.path + "' from path = '" + indexBrowser.currentPath + "'")
+        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)
-                }
+            if (fileInfo.isDirectory()) {
+                indexBrowser.navigateTo(fileInfo)
+                Log.d(TAG, "load folder cache bg")
+                binding.listView.visibility = View.GONE
+                binding.progressBar.visibility = View.VISIBLE
             } else {
                 Log.i(TAG, "pulling file = " + fileInfo)
                 executeWithPermissions(
-                        Runnable { DownloadFileTask(this, syncthingClient(), fileInfo).downloadFile() })
+                        Runnable { libraryHandler?.syncthingClient { DownloadFileTask(this, it, fileInfo).downloadFile() } })
             }
         }
     }
 
+    private fun onFolderChanged() {
+        runOnUiThread {
+            binding.progressBar.visibility = View.GONE
+            binding.listView.visibility = View.VISIBLE
+            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)
+            assert(!list.isEmpty())//list must contain at least the 'parent' path
+            adapter.clear()
+            adapter.addAll(list)
+            adapter.notifyDataSetChanged()
+            binding.listView.setSelection(0)
+            if (indexBrowser.isRoot())
+                libraryHandler?.folderBrowser {
+                    supportActionBar?.title = it.getFolderInfo(indexBrowser.folder)?.label
+                }
+            else
+                supportActionBar?.title = indexBrowser.currentPathInfo().fileName
+        }
+}
+
     private fun updateFolderListView() {
-        showFolderListView(indexBrowser!!.folder, indexBrowser!!.currentPath)
+        showFolderListView(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)
+            startActivityForResult(intentFor<FilePickerActivity>(), REQUEST_SELECT_UPLOAD_FILE)
         })
     }
 
-    override fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {
-        binding.mainIndexProgressBarLabel.text = ("index update, folder "
-                + folder.label + " " + percentage + "% synchronized")
+    override fun onIndexUpdateProgress(folder: String, percentage: Int) {
+        binding.indexUpdate.visibility = View.VISIBLE
+        binding.indexUpdateLabel.text = getString(R.string.index_update_progress_label, folder, percentage)
         updateFolderListView()
     }
 
     override fun onIndexUpdateComplete() {
-        binding.mainIndexProgressBar.visibility = View.GONE
+        binding.indexUpdate.visibility = View.GONE
         updateFolderListView()
     }
 

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

@@ -4,22 +4,24 @@ import android.app.AlertDialog
 import android.content.res.Configuration
 import android.databinding.DataBindingUtil
 import android.os.Bundle
-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.experimental.android.UI
+import kotlinx.coroutines.experimental.async
 import net.syncthing.lite.R
 import net.syncthing.lite.databinding.ActivityMainBinding
 import net.syncthing.lite.fragments.DevicesFragment
 import net.syncthing.lite.fragments.FoldersFragment
-import net.syncthing.lite.utils.UpdateIndexTask
+import net.syncthing.lite.fragments.SyncthingFragment
+import net.syncthing.lite.library.UpdateIndexTask
 
 class MainActivity : SyncthingActivity() {
 
     private lateinit var binding: ActivityMainBinding
     private var drawerToggle: ActionBarDrawerToggle? = null
+    private var currentFragment: SyncthingFragment? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -34,15 +36,19 @@ 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 +63,16 @@ 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.update_index -> libraryHandler?.syncthingClient { UpdateIndexTask(this@MainActivity, it).updateIndex() }
             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)
@@ -77,7 +82,8 @@ class MainActivity : SyncthingActivity() {
         return true
     }
 
-    private fun setContentFragment(fragment: Fragment) {
+    private fun setContentFragment(fragment: SyncthingFragment) {
+        currentFragment = fragment
         supportFragmentManager
                 .beginTransaction()
                 .replace(R.id.content_frame, fragment)
@@ -85,17 +91,22 @@ class MainActivity : SyncthingActivity() {
     }
 
     private fun cleanCacheAndIndex() {
-        syncthingClient().clearCacheAndIndex()
-        recreate()
+        async(UI) {
+            libraryHandler?.syncthingClient { it.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 onIndexUpdateProgress(folder: String, percentage: Int) {
+        async(UI) {
+            binding.indexUpdate.visibility = View.VISIBLE
+            binding.indexUpdateLabel.text = getString(R.string.index_update_progress_label, folder, percentage)
+        }
     }
 
     override fun onIndexUpdateComplete() {
-        binding.mainIndexProgressBar.visibility = View.GONE
+        async(UI) {
+            binding.indexUpdate.visibility = View.GONE
+        }
     }
 }

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

@@ -1,109 +1,52 @@
 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.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.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
-    }
-
-    fun syncthingClient(): SyncthingClient = libraryHandler!!.syncthingClient!!
-
-    fun configuration(): ConfigurationService = libraryHandler!!.configuration!!
-
-    fun folderBrowser(): FolderBrowser = libraryHandler!!.folderBrowser!!
+    var libraryHandler: LibraryHandler? = null
+        private set
+    private var loadingDialog: AlertDialog? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         HandroidLoggerAdapter.DEBUG = BuildConfig.DEBUG
-        activityCount++
-        if (libraryHandler == null) {
-            InitTask(this, this::onLibraryLoaded).execute()
-        }
+
+        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(this, this::onLibraryLoadedInternal,
+                                        this::onIndexUpdateProgress, this::onIndexUpdateComplete)
     }
 
     override fun onDestroy() {
         super.onDestroy()
-        activityCount--
-        Thread {
-            if (activityCount == 0) {
-                libraryHandler!!.destroy()
-                libraryHandler = null
-            }
-        }.start()
+        libraryHandler?.close()
+        loadingDialog?.dismiss()
     }
 
-    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()
+    private fun onLibraryLoadedInternal(libraryHandler: LibraryHandler) {
+        this.libraryHandler = libraryHandler
+        if (!isDestroyed) {
+            loadingDialog?.dismiss()
         }
+        onLibraryLoaded()
     }
 
-    open fun onIndexUpdateProgress(folder: FolderInfo, percentage: Int) {}
+    open fun onIndexUpdateProgress(folder: String, percentage: Int) {}
 
     open fun onIndexUpdateComplete() {}
 

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

@@ -6,13 +6,12 @@ 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.lite.databinding.ListviewDeviceBinding
 
 class DevicesAdapter(context: Context) :
-        ArrayAdapter<DeviceStats>(context, R.layout.listview_device, Lists.newArrayList()) {
+        ArrayAdapter<DeviceStats>(context, R.layout.listview_device, mutableListOf()) {
 
     override fun getView(position: Int, v: View?, parent: ViewGroup): View {
         val binding: ListviewDeviceBinding

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

@@ -7,14 +7,13 @@ 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
 
 class FolderContentsAdapter(context: Context) :
-        ArrayAdapter<FileInfo>(context, R.layout.listview_file, Lists.newArrayList()) {
+        ArrayAdapter<FileInfo>(context, R.layout.listview_file, mutableListOf()) {
 
     override fun getView(position: Int, v: View?, parent: ViewGroup): View {
         val binding: ListviewFileBinding =
@@ -25,15 +24,15 @@ class FolderContentsAdapter(context: Context) :
             }
         val fileInfo = getItem(position)
         binding.fileLabel.text = fileInfo!!.fileName
-        if (fileInfo.isDirectory) {
+        if (fileInfo.isDirectory()) {
             binding.fileIcon.setImageResource(R.drawable.ic_folder_black_24dp)
             binding.fileSize.visibility = View.GONE
         } 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.text = context.getString(R.string.file_info,
+                    FileUtils.byteCountToDisplaySize(fileInfo.size!!),
+                    DateUtils.getRelativeDateTimeString(context, fileInfo.lastModified.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0))
         }
         return binding.root
     }

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

@@ -13,7 +13,7 @@ import net.syncthing.lite.R
 import net.syncthing.lite.databinding.ListviewFolderBinding
 import org.apache.commons.lang3.tuple.Pair
 
-class FoldersListAdapter(context: Context, list: List<Pair<FolderInfo, FolderStats>>) :
+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 {
@@ -25,13 +25,14 @@ class FoldersListAdapter(context: Context, list: List<Pair<FolderInfo, FolderSta
             }
         val folderInfo = getItem(position)!!.left
         val folderStats = getItem(position)!!.right
-        binding.folderName.text = "${folderInfo.label} (${folderInfo.folder})"
+        binding.folderName.text = context.getString(R.string.folder_label_format, 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"
+                    context.getString(R.string.last_modified_unknown)
+                else context.getString(R.string.last_modified_time,
+                        DateUtils.getRelativeDateTimeString(context, folderStats.lastUpdate.time, DateUtils.MINUTE_IN_MILLIS, DateUtils.WEEK_IN_MILLIS, 0))
+        binding.folderContentInfo.text = context.getString(R.string.folder_content_info, folderStats.describeSize(), folderStats.fileCount, folderStats.dirCount)
         return binding.root
     }
 

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

@@ -5,8 +5,6 @@ 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
@@ -14,26 +12,24 @@ import android.view.inputmethod.InputMethodManager
 import android.widget.EditText
 import android.widget.Toast
 import com.google.zxing.integration.android.IntentIntegrator
+import kotlinx.coroutines.experimental.android.UI
+import kotlinx.coroutines.experimental.async
+import net.syncthing.java.core.beans.DeviceId
 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.DevicesAdapter
 import net.syncthing.lite.databinding.FragmentDevicesBinding
-import net.syncthing.lite.utils.UpdateIndexTask
+import net.syncthing.lite.library.UpdateIndexTask
+import net.syncthing.lite.utils.FragmentIntentIntegrator
 import org.apache.commons.lang3.StringUtils.isBlank
 import uk.co.markormesher.android_fab.SpeedDialMenuAdapter
 import uk.co.markormesher.android_fab.SpeedDialMenuItem
+import java.io.IOException
 import java.security.InvalidParameterException
 
-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
 
@@ -45,34 +41,34 @@ class DevicesFragment : Fragment() {
         return binding.root
     }
 
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        syncthingActivity = activity as SyncthingActivity
+    override fun onLibraryLoaded() {
         initDeviceList()
         updateDeviceList()
     }
 
     private fun initDeviceList() {
-        adapter = DevicesAdapter(syncthingActivity)
+        adapter = DevicesAdapter(context!!)
         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?")
+            val device = (binding.list.getItemAtPosition(position) as DeviceStats)
+            AlertDialog.Builder(context)
+                    .setTitle(getString(R.string.remove_device_title, device.name))
+                    .setMessage(getString(R.string.remove_device_message, device.deviceId.deviceId.substring(0, 7)))
                     .setPositiveButton(android.R.string.yes) { _, _ ->
-                        syncthingActivity.configuration().edit().removePeer(deviceId).persistLater() }
+                        libraryHandler?.configuration { it.Editor().removePeer(device.deviceId).persistLater() }
+                    }
                     .setNegativeButton(android.R.string.no, null)
                     .show()
-            Log.d(TAG, "showFolderListView delete device = '$deviceId'")
             false
         }
     }
 
     private fun updateDeviceList() {
-        adapter.clear()
-        adapter.addAll(syncthingActivity.syncthingClient().devicesHandler.deviceStatsList)
-        adapter.notifyDataSetChanged()
+        libraryHandler?.syncthingClient { syncthingClient ->
+            adapter.clear()
+            adapter.addAll(syncthingClient.devicesHandler.getDeviceStatsList())
+            adapter.notifyDataSetChanged()
+        }
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, intent: Intent?) {
@@ -86,22 +82,27 @@ class DevicesFragment : Fragment() {
         }
     }
 
-    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
-        }
+    private fun importDeviceId(deviceIdString: String) {
+        libraryHandler?.library { configuration, syncthingClient, _ ->
+            async(UI) {
+                val deviceId =
+                    try {
+                        DeviceId(deviceIdString)
+                    } catch (e: IOException) {
+                        Toast.makeText(this@DevicesFragment.context, R.string.invalid_device_id, Toast.LENGTH_SHORT).show()
+                        return@async
+                    }
 
-        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()
+                val modified = configuration.Editor().addPeers(DeviceInfo(deviceId, null))
+                if (modified) {
+                    configuration.Editor().persistLater()
+                    Toast.makeText(this@DevicesFragment.context, getString(R.string.device_import_success, deviceId), Toast.LENGTH_SHORT).show()
+                    updateDeviceList()//TODO remove this if event triggered (and handler trigger update)
+                    UpdateIndexTask(this@DevicesFragment.context!!, syncthingClient).updateIndex()
+                } else {
+                    Toast.makeText(this@DevicesFragment.context, getString(R.string.device_already_known, deviceId), Toast.LENGTH_SHORT).show()
+                }
+            }
         }
     }
 

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

@@ -1,32 +1,21 @@
 package net.syncthing.lite.fragments
 
-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 com.google.common.collect.Lists
-import com.google.common.collect.Ordering
-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.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() {
 
-    companion object {
-        private val TAG = "FoldersFragment"
-    }
+    private val TAG = "FoldersFragment"
 
-    private lateinit var syncthingActivity: SyncthingActivity
     private lateinit var binding: FragmentFoldersBinding
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
@@ -36,24 +25,21 @@ class FoldersFragment : Fragment() {
         return binding.root
     }
 
-    override fun onActivityCreated(savedInstanceState: Bundle?) {
-        super.onActivityCreated(savedInstanceState)
-        syncthingActivity = activity as SyncthingActivity
+    override fun onLibraryLoaded() {
         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)
+        libraryHandler?.folderBrowser { folderBrowser ->
+            val list = folderBrowser.folderInfoAndStatsList().sortedBy { it.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 = context?.intentFor<FolderBrowserActivity>(FolderBrowserActivity.EXTRA_FOLDER_NAME to 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/SyncthingFragment.kt

@@ -0,0 +1,33 @@
+package net.syncthing.lite.fragments
+
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import net.syncthing.lite.library.LibraryHandler
+
+abstract class SyncthingFragment : Fragment() {
+
+    var libraryHandler: LibraryHandler? = null
+        private set
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        LibraryHandler(context!!, this::onLibraryLoadedInternal, this::onIndexUpdateProgress,
+                this::onIndexUpdateComplete)
+    }
+
+    private fun onLibraryLoadedInternal(libraryHandler: LibraryHandler) {
+        this.libraryHandler = libraryHandler
+        onLibraryLoaded()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        libraryHandler?.close()
+    }
+
+    open fun onLibraryLoaded() {}
+
+    open fun onIndexUpdateProgress(folder: String, percentage: Int) {}
+
+    open fun onIndexUpdateComplete() {}
+}

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

@@ -0,0 +1,106 @@
+package net.syncthing.lite.library
+
+import android.app.ProgressDialog
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.support.annotation.StringRes
+import android.support.v4.content.FileProvider
+import android.util.Log
+import android.webkit.MimeTypeMap
+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 org.jetbrains.anko.doAsync
+import org.jetbrains.anko.newTask
+import org.jetbrains.anko.toast
+import org.jetbrains.anko.uiThread
+import java.io.File
+import java.io.IOException
+
+class DownloadFileTask(private val mContext: Context, private val mSyncthingClient: SyncthingClient,
+                       private val mFileInfo: FileInfo) {
+
+    private val TAG = "DownloadFileTask"
+    private lateinit var progressDialog: ProgressDialog
+    private var cancelled = false
+
+    fun downloadFile() {
+        showDialog()
+        mSyncthingClient.pullFile(mFileInfo, { observer ->
+            onProgress(observer)
+            try {
+                while (!observer.isCompleted()) {
+                    if (cancelled)
+                        return@pullFile
+
+                    observer.waitForProgressUpdate()
+                    Log.i("pullFile", "download progress = " + observer.progressMessage())
+                    onProgress(observer)
+                }
+
+                val outputFile = File("${mContext.externalCacheDir}/${mFileInfo.folder}/${mFileInfo.path}")
+                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) }
+    }
+
+    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) {
+        doAsync {
+            uiThread {
+                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)
+        val uri = FileProvider.getUriForFile(mContext, "net.syncthing.lite.fileprovider", file)
+        intent.setDataAndType(uri, mimeType)
+        intent.newTask()
+        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+        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) {
+        doAsync {
+            uiThread {
+                progressDialog.dismiss()
+                mContext.toast(error)
+            }
+        }
+    }
+}

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

@@ -0,0 +1,178 @@
+package net.syncthing.lite.library
+
+import android.content.Context
+import android.os.Handler
+import android.preference.PreferenceManager
+import android.util.Log
+import kotlinx.coroutines.experimental.android.UI
+import kotlinx.coroutines.experimental.async
+import net.syncthing.java.bep.FolderBrowser
+import net.syncthing.java.client.SyncthingClient
+import net.syncthing.java.core.beans.FileInfo
+import net.syncthing.java.core.beans.IndexInfo
+import net.syncthing.java.core.configuration.ConfigurationService
+import net.syncthing.java.core.security.KeystoreHandler
+import net.syncthing.lite.utils.Util
+import org.apache.commons.io.FileUtils
+import org.jetbrains.anko.doAsync
+import org.jetbrains.anko.uiThread
+import java.io.File
+import java.io.IOException
+import java.util.*
+
+class LibraryHandler(context: Context, onLibraryLoaded: (LibraryHandler) -> Unit,
+                     private val onIndexUpdateProgressListener: (String, Int) -> Unit,
+                     private val onIndexUpdateCompleteListener: () -> Unit) {
+
+    companion object {
+        private var instanceCount = 0
+        private var configuration: ConfigurationService? = null
+        private var syncthingClient: SyncthingClient? = null
+        private var folderBrowser: FolderBrowser? = null
+        private val callbacks = ArrayList<(ConfigurationService, SyncthingClient, FolderBrowser) -> Unit>()
+        private var isLoading = false
+    }
+
+    private val TAG = "LibConnectionHandler"
+
+    private val onIndexUpdateListener: Any
+
+    init {
+        instanceCount++
+        if (configuration == null && !isLoading) {
+            doAsync {
+                init(context)
+                //trigger update if last was more than 10mins ago
+                val lastUpdateMillis = PreferenceManager.getDefaultSharedPreferences(context)
+                        .getLong(UpdateIndexTask.LAST_INDEX_UPDATE_TS_PREF, -1)
+                val lastUpdateTimeAgo = Date().time - lastUpdateMillis
+                if (lastUpdateMillis == -1L || lastUpdateTimeAgo > 10 * 60 * 1000) {
+                    Log.d(TAG, "trigger index update, last was " + Date(lastUpdateMillis))
+                    syncthingClient { UpdateIndexTask(context, it).updateIndex() }
+                }
+                uiThread {
+                    onLibraryLoaded(this@LibraryHandler)
+                }
+            }
+        } else {
+            onLibraryLoaded(this)
+        }
+
+        onIndexUpdateListener = object : Any() {
+        }
+        syncthingClient {
+            it.indexHandler.registerOnIndexRecordAcquiredListener(this::onIndexRecordAcquired)
+            it.indexHandler.registerOnFullIndexAcquiredListenersListener(this::onRemoteIndexAcquired)
+        }
+    }
+
+    private fun onIndexRecordAcquired(folderId: String, newRecords: List<FileInfo>, indexInfo: IndexInfo) {
+        newRecords.size
+        Log.i(TAG, "handleIndexRecordEvent trigger folder list update from index record acquired")
+        onIndexUpdateProgressListener(folderId, (indexInfo.getCompleted() * 100).toInt())
+    }
+
+    private fun onRemoteIndexAcquired(folderId: String) {
+        Log.i(TAG, "handleIndexAcquiredEvent trigger folder list update from index acquired")
+        onIndexUpdateCompleteListener()
+    }
+
+    private fun init(context: Context) {
+        isLoading = true
+        val configuration = ConfigurationService.Loader()
+                .setCache(File(context.externalCacheDir, ".cache"))
+                .setDatabase(File(context.getExternalFilesDir(null), "database"))
+                .loadFrom(File(context.getExternalFilesDir(null), "config.properties"))
+        configuration.Editor().setDeviceName(Util.getDeviceName())
+        try {
+            FileUtils.cleanDirectory(configuration.temp)
+        } catch (e: IOException) {
+            Log.e(TAG, "Failed to delete temporary files", e)
+            close()
+        }
+
+        KeystoreHandler.Loader().loadAndStore(configuration)
+        configuration.Editor().persistLater()
+        Log.i(TAG, "loaded mConfiguration = " + configuration.Writer().dumpToString())
+        Log.i(TAG, "storage space = " + configuration.getStorageInfo().dumpAvailableSpace())
+        val syncthingClient = SyncthingClient(configuration)
+        //TODO listen for device events, update device list
+        val folderBrowser = syncthingClient.indexHandler.newFolderBrowser()
+
+        if (instanceCount == 0) {
+            Log.d(TAG, "All LibraryHandler instances were closed during init")
+            configuration.close()
+            syncthingClient.close()
+            folderBrowser.close()
+        }
+
+        async(UI) {
+            callbacks.forEach { it(configuration, syncthingClient, folderBrowser) }
+        }
+        LibraryHandler.configuration = configuration
+        LibraryHandler.syncthingClient = syncthingClient
+        LibraryHandler.folderBrowser = folderBrowser
+        isLoading = false
+    }
+
+    fun library(callback: (ConfigurationService, SyncthingClient, FolderBrowser) -> Unit) {
+        val nullCount = listOf(configuration, syncthingClient, folderBrowser).count { it == null }
+        assert(nullCount == 0 || nullCount == 3, { "Inconsistent library state" })
+
+        // https://stackoverflow.com/a/35522422/1837158
+        fun <T1: Any, T2: Any, T3: Any, R: Any> safeLet(p1: T1?, p2: T2?, p3: T3?, block: (T1, T2, T3)->R?): R? {
+            return if (p1 != null && p2 != null && p3 != null) block(p1, p2, p3) else null
+        }
+        safeLet(configuration, syncthingClient, folderBrowser) { c, s, f ->
+            callback(c, s, f)
+        } ?: run {
+            if (isLoading) {
+                callbacks.add(callback)
+            }
+        }
+    }
+
+    fun syncthingClient(callback: (SyncthingClient) -> Unit) {
+        library { _, s, _ -> callback(s) }
+    }
+
+    fun configuration(callback: (ConfigurationService) -> Unit) {
+        library { c, _, _ -> callback(c) }
+    }
+
+    fun folderBrowser(callback: (FolderBrowser) -> Unit) {
+        library { _, _, f -> callback(f) }
+    }
+
+    /**
+     * Unregisters index update listener and decreases instance count.
+     *
+     * We wait a bit before closing [[syncthingClient]] etc, in case LibraryHandler is opened again
+     * soon (eg in case of device rotation).
+     */
+    fun close() {
+        syncthingClient {
+            try {
+                it.indexHandler.unregisterOnIndexRecordAcquiredListener(this::onIndexRecordAcquired)
+                it.indexHandler.unregisterOnFullIndexAcquiredListenersListener(this::onRemoteIndexAcquired)
+            } catch (e: IllegalArgumentException) {
+                // ignored, no idea why this is thrown
+            }
+        }
+
+        instanceCount--
+        Handler().postDelayed({
+            Thread {
+                if (instanceCount == 0) {
+                    folderBrowser?.close()
+                    folderBrowser = null
+                    syncthingClient?.close()
+                    syncthingClient = null
+                    configuration?.close()
+                    configuration = null
+                }
+            }.start()
+        }, 1000)
+
+    }
+}

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

@@ -1,28 +1,28 @@
-package net.syncthing.lite.utils
+package net.syncthing.lite.library
 
 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 org.jetbrains.anko.doAsync
+import org.jetbrains.anko.toast
+import org.jetbrains.anko.uiThread
 import java.util.*
 
-class UpdateIndexTask(private val mContext: Context, private val mSyncthingClient: SyncthingClient) {
-    private val mPreferences = PreferenceManager.getDefaultSharedPreferences(mContext)
-    private val mMainHandler = Handler()
+class UpdateIndexTask(private val androidContext: Context, private val syncthingClient: SyncthingClient) {
+    private val mPreferences = PreferenceManager.getDefaultSharedPreferences(androidContext)
 
     fun updateIndex() {
         if (sIndexUpdateInProgress)
             return
 
         sIndexUpdateInProgress = true
-        mSyncthingClient.updateIndexFromPeers { _, failures ->
+        syncthingClient.updateIndexFromPeers { _, failures ->
             sIndexUpdateInProgress = false
             if (failures.isEmpty()) {
-                showToast(mContext.getString(R.string.toast_index_update_successful))
+                showToast(androidContext.getString(R.string.toast_index_update_successful))
             } else {
-                showToast(mContext.getString(R.string.toast_index_update_failed, failures.size))
+                showToast(androidContext.getString(R.string.toast_index_update_failed, failures.size))
             }
             mPreferences.edit()
                     .putLong(LAST_INDEX_UPDATE_TS_PREF, Date().time)
@@ -31,7 +31,11 @@ class UpdateIndexTask(private val mContext: Context, private val mSyncthingClien
     }
 
     private fun showToast(message: String) {
-        mMainHandler.post { Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show() }
+        doAsync {
+            uiThread {
+                androidContext.toast(message)
+            }
+        }
     }
 
     companion object {

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

@@ -1,15 +1,17 @@
-package net.syncthing.lite.utils
+package net.syncthing.lite.library
 
 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 kotlinx.coroutines.experimental.android.UI
+import kotlinx.coroutines.experimental.async
 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 net.syncthing.lite.utils.Util
+import org.jetbrains.anko.toast
 import java.io.IOException
 
 // TODO: this should be an IntentService with notification
@@ -24,7 +26,6 @@ class UploadFileTask(private val context: Context, private val syncthingClient:
 
     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
@@ -37,12 +38,12 @@ class UploadFileTask(private val context: Context, private val syncthingClient:
             syncthingClient.pushFile(uploadStream, syncthingFolder, syncthingPath, { observer ->
                 onProgress(observer)
                 try {
-                    while (!observer.isCompleted) {
+                    while (!observer.isCompleted()) {
                         if (mCancelled)
                             return@pushFile
 
                         observer.waitForProgressUpdate()
-                        Log.i(TAG, "upload progress = " + observer.progressMessage)
+                        Log.i(TAG, "upload progress = " + observer.progressMessage())
                         onProgress(observer)
                     }
                 } catch (e: InterruptedException) {
@@ -68,27 +69,29 @@ class UploadFileTask(private val context: Context, private val syncthingClient:
     }
 
     private fun onProgress(observer: BlockPusher.FileUploadObserver) {
-        mainHandler.post {
+        async(UI) {
             mProgressDialog.isIndeterminate = false
-            mProgressDialog.max = observer.dataSource.size.toInt()
-            mProgressDialog.progress = (observer.progress * observer.dataSource.size).toInt()
+            mProgressDialog.max = observer.dataSource().getSize().toInt()
+            mProgressDialog.progress = (observer.progress() * observer.dataSource().getSize()).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()
+        async(UI) {
+            mProgressDialog.dismiss()
+            this@UploadFileTask.context.toast(R.string.toast_upload_complete)
             onUploadCompleteListener()
         }
     }
 
     private fun onError() {
-        mProgressDialog.dismiss()
-        mainHandler.post { Toast.makeText(context, R.string.toast_file_upload_failed, Toast.LENGTH_SHORT).show() }
+        async(UI) {
+            mProgressDialog.dismiss()
+            this@UploadFileTask.context.toast(R.string.toast_file_upload_failed)
+        }
     }
-}
+}

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/Util.kt

@@ -5,16 +5,16 @@ 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 org.apache.commons.lang3.StringUtils.capitalize
 import java.io.File
 
 object Util {
 
+    private val Tag = "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)
@@ -22,16 +22,16 @@ 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")) {
+        if (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)
+                Log.d(Tag, "recovered 'content' uri real path = " + path)
                 fileName = File(Uri.parse(path).lastPathSegment).name
             }
         }

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

@@ -19,7 +19,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="40dp"
                     android:padding="8dp"
-                    android:id="@+id/main_index_progress_bar"
+                    android:id="@+id/index_update"
                     android:orientation="horizontal"
                     android:background="@color/primary"
                     android:visibility="gone">
@@ -27,9 +27,10 @@
                         android:layout_width="wrap_content"
                         android:layout_height="match_parent"
                         android:indeterminate="true"
-                        android:paddingStart="12dp"/>
+                        android:paddingStart="12dp"
+                        android:paddingEnd="12dp"/>
                     <TextView
-                        android:id="@+id/main_index_progress_bar_label"
+                        android:id="@+id/index_update_label"
                         android:layout_width="0dp"
                         android:layout_weight="1"
                         android:layout_height="match_parent"
@@ -47,12 +48,13 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
-                    android:id="@+id/main_folder_and_files_list_view"
+                    android:id="@+id/list_view"
                     android:divider="@color/divider"
                     android:dividerHeight="2dp">
                 </ListView>
+
                 <TextView
-                    android:id="@+id/main_list_view_empty_element"
+                    android:id="@+id/empty_view"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
@@ -60,6 +62,13 @@
                     android:text="@string/folder_list_empty_message"
                     android:textSize="20sp"
                     android:visibility="gone" />
+
+                <ProgressBar
+                    android:id="@+id/progress_bar"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:layout_gravity="center"
+                    android:visibility="gone"/>
                 <!--main list view END-->
 
             </LinearLayout>

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

@@ -0,0 +1,22 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ListView
+            android:id="@android:id/list"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+
+        <TextView
+            android:id="@android:id/empty"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="@string/directory_empty" />
+    </FrameLayout>
+</LinearLayout>

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

@@ -11,7 +11,7 @@
             android:layout_width="match_parent"
             android:layout_height="40dp"
             android:padding="8dp"
-            android:id="@+id/main_index_progress_bar"
+            android:id="@+id/index_update"
             android:orientation="horizontal"
             android:background="@color/primary"
             android:visibility="gone">
@@ -22,7 +22,7 @@
                 android:paddingStart="12dp"
                 android:paddingEnd="12dp"/>
             <TextView
-                android:id="@+id/main_index_progress_bar_label"
+                android:id="@+id/index_update_label"
                 android:layout_width="0dp"
                 android:layout_weight="1"
                 android:layout_height="match_parent"

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

@@ -0,0 +1,13 @@
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <TextView
+    android:id="@android:id/text1"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textAppearance="@style/TextAppearance.AppCompat.Body1"
+    android:gravity="center_vertical"
+    android:paddingLeft="@dimen/abc_action_bar_content_inset_material"
+    android:paddingRight="@dimen/abc_action_bar_content_inset_material"
+    android:minHeight="48dp" />
+
+</layout>

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

@@ -4,14 +4,14 @@
 
         <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"

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

@@ -0,0 +1,37 @@
+<resources>
+    <string name="app_name">Syncthing Lite</string>
+    <string name="index_update_progress_message">Index wird aktualisiert…</string>
+    <string name="folder_list_empty_message">Keine Ordner verfügbar</string>
+    <string name="clear_local_cache_index_label">Lokalen Index und Cache löschen</string>
+    <string name="update_remote_index_label">Index aktualisieren</string>
+    <string name="devices_list_view_empty_message">Keine Geräte verfügbar</string>
+    <string name="toast_write_storage_permission_required">Schreibrechte werden für diese Funktion benötigt</string>
+    <string name="scan_qr_code">QR code scannen</string>
+    <string name="enter_device_id">Geräte ID eingeben</string>
+    <string name="invalid_device_id">Ungültige Geräte ID</string>
+    <string name="device_id_dialog_title">Geräte ID eingeben</string>
+    <string name="toast_index_update_successful">Index erfolgreich aktualisiert</string>
+    <string name="toast_index_update_failed">Index update für %1$d Geräte fehlgeschlagen</string>
+    <string name="dialog_downloading_file">Datei %1$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$s wird hochgeladen</string>
+    <string name="directory_empty">Ordner ist leer</string>
+    <string name="clear_cache_and_index_title">Lokalen Cache und Index löschen?</string>
+    <string name="clear_cache_and_index_body">Gesamten lokalen Cache und Index löschen?</string>
+    <string name="index_update_progress_label">Index aktualisierung für Ordner %1$s, %2$d\\% synchronisiert</string>
+    <string name="loading_config_starting_syncthing_client">Konfiguartion wird geladen, Syncthing wird gestartet</string>
+    <string name="last_modified_unknown">zuletzt modifiziert: unbekannt</string>
+    <string name="last_modified_time">Zuletzt modifiziert: %1$s</string>
+    <string name="remove_device_title">Gerät entfernen:</string>
+    <string name="remove_device_message">Gerät %1$s entfernen?</string>
+    <string name="device_import_success">Gerät %1$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>
+</resources>

app/src/main/res/values/colors.xml

@@ -6,7 +6,4 @@
     <color name="accent">#FFC107</color>
     <color name="divider">#1F000000</color>
 
-    <color name="device_online_active">#ff99cc00</color>
-    <color name="device_online_inactive">#f43703</color>
-    <color name="device_offline">#aaaaaa</color>
 </resources>

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

@@ -1,10 +1,10 @@
 <resources>
     <string name="app_name">Syncthing Lite</string>
-    <string name="index_update_progress_message">index update…</string>
-    <string name="folder_list_empty_message">no folder available</string>
-    <string name="clear_local_cache_index_label">clear local cache/index</string>
-    <string name="update_remote_index_label">update remote index</string>
-    <string name="devices_list_view_empty_message">no devices available</string>
+    <string name="index_update_progress_message">Index update…</string>
+    <string name="folder_list_empty_message">No folder available</string>
+    <string name="clear_local_cache_index_label">Clear local cache/index</string>
+    <string name="update_remote_index_label">Update remote index</string>
+    <string name="devices_list_view_empty_message">No devices available</string>
     <string name="toast_write_storage_permission_required">Write storage permission is required for this functionality</string>
     <string name="scan_qr_code">Scan QR code</string>
     <string name="enter_device_id">Enter device ID</string>
@@ -18,4 +18,20 @@
     <string name="toast_file_upload_failed">File upload failed</string>
     <string name="toast_upload_complete">File upload complete</string>
     <string name="dialog_uploading_file">Uploading file %1$s</string>
+    <string name="directory_empty">Directory is empty</string>
+    <string name="clear_cache_and_index_title">Clear local cache and index?</string>
+    <string name="clear_cache_and_index_body">Clear all local cache data and index data?</string>
+    <string name="index_update_progress_label">Index update for folder %1$s, %2$d% synchronized</string>
+    <string name="loading_config_starting_syncthing_client">Loading config, starting syncthing client</string>
+    <string name="last_modified_unknown">Last modified: unknown</string>
+    <string name="last_modified_time">Last modified: %1$s</string>
+    <string name="remove_device_title">Remove device %1$s\?</string>
+    <string name="remove_device_message">Remove device %1$s from list of known devices?</string>
+    <string name="device_import_success">Successfully imported device %1$s</string>
+    <string name="device_already_known">Device already present %1$s</string>
+    <string name="folders_label">Folders</string>
+    <string name="devices_label">Devices</string>
+    <string name="folder_label_format">%1$s (%2$s)</string>
+    <string name="folder_content_info">%1$s, %2$d files, %3$d directories</string>
+    <string name="file_info">%1$s, last modified %2$s</string>
 </resources>

app/src/main/res/values/themes.xml

@@ -6,17 +6,4 @@
         <item name="colorAccent">@color/accent</item>
     </style>
 
-    <style name="FilePickerTheme" parent="NNF_BaseTheme">
-        <item name="colorPrimary">@color/primary</item>
-        <item name="colorPrimaryDark">@color/primary_dark</item>
-        <item name="colorAccent">@color/accent</item>
-        <item name="alertDialogTheme">@style/FilePickerAlertDialogTheme</item>
-    </style>
-
-    <style name="FilePickerAlertDialogTheme" parent="Theme.AppCompat.Dialog.Alert">
-        <item name="colorPrimary">@color/primary</item>
-        <item name="colorPrimaryDark">@color/primary_dark</item>
-        <item name="colorAccent">@color/accent</item>
-    </style>
-
 </resources>

app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <external-cache-path name="files" path="/" />
+</paths>

build.gradle

@@ -1,9 +1,10 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.0'
+    ext.kotlin_version = '1.2.20'
     ext.support_version = '27.0.2'
     ext.build_tools_version = '3.0.1'
+    ext.anko_version = '0.10.4'
     repositories {
         mavenLocal()
         jcenter()
@@ -13,9 +14,7 @@ buildscript {
     dependencies {
         classpath "com.android.tools.build:gradle:$build_tools_version"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
+        classpath 'com.github.ben-manes:gradle-versions-plugin:0.17.0'
     }
 }
 

prepare-release.bash

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -e
+
+NEW_VERSION_NAME=$1
+OLD_VERSION_NAME=$(grep "versionName" "app/build.gradle" | awk '{print $2}' | tr -d "\"")
+if [[ -z ${NEW_VERSION_NAME} ]]
+then
+    echo "New version name is empty. Please set a new version. Current version: $OLD_VERSION_NAME"
+    exit
+fi
+
+echo "
+
+Updating Translations
+-----------------------------
+"
+tx push -s
+# Force push/pull to make sure this is executed. Apparently tx only compares timestamps, not file
+# contents. So if a file was `touch`ed, it won't be updated by default.
+tx pull -a -f
+git add -A "app/src/main/res/values-*/strings.xml"
+if ! git diff --cached --exit-code;
+then
+    git commit -m "Imported translations"
+fi
+
+echo "
+
+Updating Version
+-----------------------------
+"
+OLD_VERSION_CODE=$(grep "versionCode" "app/build.gradle" -m 1 | awk '{print $2}')
+NEW_VERSION_CODE=$(($OLD_VERSION_CODE + 1))
+sed -i "s/versionCode $OLD_VERSION_CODE/versionCode $NEW_VERSION_CODE/" "app/build.gradle"
+sed -i "s/versionName \"$OLD_VERSION_NAME\"/versionName \"$NEW_VERSION_NAME\"/" "app/build.gradle"
+
+LIBRARY_NAME="com.github.Nutomic:syncthing-java"
+sed -i "s/$LIBRARY_NAME:$OLD_VERSION_NAME/$LIBRARY_NAME:$NEW_VERSION_NAME/" "app/build.gradle"
+
+git add "app/build.gradle"
+git commit -m "Version $NEW_VERSION_NAME"
+git tag ${NEW_VERSION_NAME}
+
+echo "
+
+Running Lint
+-----------------------------
+"
+./gradlew clean lintVitalRelease
+
+echo "
+Update ready.
+"

publish-release.bash

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -e
+
+version=$(git describe --tags)
+regex='^[0-9]+\.[0-9]+\.[0-9]+$'
+if [[ ! ${version} =~ $regex ]]
+then
+    echo "Current commit is not a release"
+    exit;
+fi
+
+echo "
+
+Pushing to Github
+-----------------------------
+"
+git push
+git push --tags
+
+echo "
+
+Push to Google Play
+-----------------------------
+"
+
+read -s -p "Enter signing password: " password
+
+SIGNING_PASSWORD=${password} ./gradlew assembleRelease
+
+# Upload apk and listing to Google Play
+SIGNING_PASSWORD=${password} ./gradlew publishRelease
+
+echo "
+
+Release published!
+"