nut_player/nut_player_android/android/build.gradle

import java.security.MessageDigest
import java.security.NoSuchAlgorithmException

group 'tech.nut.nut_player_android'
version '1.0-SNAPSHOT'

String localMavenPath = project.mkdir("build").absolutePath

buildscript {
    ext.kotlin_version = '1.7.10'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.3.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'org.jetbrains.kotlin.plugin.serialization'

def flutterSdkVersions = new Properties()
def flutterSdkVersionsFile = rootProject.file('flutterSdkVersions.properties')
if (flutterSdkVersionsFile.exists()) {
    flutterSdkVersionsFile.withReader('UTF-8') { reader ->
        flutterSdkVersions.load(reader)
    }
}

def flutterCompileSdkVersion = flutterSdkVersions.getProperty('flutter.compileSdkVersion')
if (flutterCompileSdkVersion == null) {
    flutterCompileSdkVersion = 1
}

def flutterMinSdkVersion = flutterSdkVersions.getProperty('flutter.minSdkVersion')
if (flutterMinSdkVersion == null) {
    flutterMinSdkVersion = 1
}

android {
    if (project.android.hasProperty("namespace")) {
        namespace 'tech.nut.nut_player_android'
    }

    compileSdkVersion flutterCompileSdkVersion.toInteger()

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        minSdkVersion flutterMinSdkVersion
    }

    buildFeatures {
        viewBinding = true
    }

    dependencies {
        testImplementation 'org.jetbrains.kotlin:kotlin-test'
        testImplementation 'org.mockito:mockito-core:5.0.0'
    }

    testOptions {
        unitTests.all {
            useJUnitPlatform()

            testLogging {
               events "passed", "skipped", "failed", "standardOut", "standardError"
               outputs.upToDateWhen {false}
               showStandardStreams = true
            }
        }
    }
}

dependencies {
    implementation 'com.google.android.exoplayer:exoplayer:2.18.7'
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4'
    implementation "io.ktor:ktor-client-android:1.6.7"
    implementation "io.ktor:ktor-client-serialization:1.6.7"
    // for resolve another errors
    implementation 'com.android.support.constraint:constraint-layout:2.1.4'
    implementation 'androidx.appcompat:appcompat:1.6.1'
}

String aarPath = localMavenPath
task useAar {
    File file = project.file("libs")
    if (file.exists() && file.isDirectory()) {
        file.listFiles(new FileFilter() {
            @Override
            boolean accept(File pathname) {
                return pathname.name.endsWith(".aar")
            }
        }).each { item ->
            String groupName = "tech.nutplayer"
            String aarName = item.name.substring(0, item.name.length() - 4)
            String[] aarInfo = aarName.split("-")
            String sha1 = getFileSha1(item)
            String md5 = getFileMD5(item)
            String fromStr = item.path
            String intoStr = aarPath + "/" + groupName.replace(".", "/") + "/" + aarInfo[0] + "/" + aarInfo[1]
            String newName = aarInfo[0] + "-" + aarInfo[1] + ".aar"

            project.copy {
                from fromStr
                into intoStr
                rename(item.name, newName)
            }

            project.file(intoStr + "/" + newName + ".md5").write(md5)
            project.file(intoStr + "/" + newName + ".sha1").write(sha1)

            String pomPath = intoStr + "/" + newName.substring(0, newName.length() - 4) + ".pom"
            project.file(pomPath).write(createPomStr(groupName, aarInfo[0], aarInfo[1]))
            project.file(pomPath + ".md5").write(getFileMD5(project.file(pomPath)))
            project.file(pomPath + ".sha1").write(getFileSha1(project.file(pomPath)))

            String metadataPath = project.file(intoStr).getParentFile().path + "/maven-metadata.xml"
            project.file(metadataPath).write(createMetadataStr(groupName, aarInfo[0], aarInfo[1]))
            project.file(metadataPath + ".md5").write(getFileMD5(project.file(metadataPath)))
            project.file(metadataPath + ".sha1").write(getFileSha1(project.file(metadataPath)))
            dependencies {
                implementation "${groupName}:${aarInfo[0]}:${aarInfo[1]}"
            }
        }
    }
}

public static String createMetadataStr(String groupId, String artifactId, String version) {
    return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<metadata>\n" +
            "  <groupId>$groupId</groupId>\n" +
            "  <artifactId>$artifactId</artifactId>\n" +
            "  <versioning>\n" +
            "    <release>$version</release>\n" +
            "    <versions>\n" +
            "      <version>$version</version>\n" +
            "    </versions>\n" +
            "    <lastUpdated>${new Date().format('yyyyMMdd')}000000</lastUpdated>\n" +
            "  </versioning>\n" +
            "</metadata>\n"
}

public static String createPomStr(String groupId, String artifactId, String version) {
    return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<project xsi:schemaLocation=\"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd\" xmlns=\"http://maven.apache.org/POM/4.0.0\"\n" +
            "    xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n" +
            "  <modelVersion>4.0.0</modelVersion>\n" +
            "  <groupId>$groupId</groupId>\n" +
            "  <artifactId>$artifactId</artifactId>\n" +
            "  <version>$version</version>\n" +
            "  <packaging>aar</packaging>\n" +
            "</project>\n"
}

public static String getFileSha1(File file) {
    FileInputStream input = null;
    try {
        input = new FileInputStream(file);
        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        byte[] buffer = new byte[1024 * 1024 * 10];

        int len = 0;
        while ((len = input.read(buffer)) > 0) {
            digest.update(buffer, 0, len);
        }
        String sha1 = new BigInteger(1, digest.digest()).toString(16);
        int length = 40 - sha1.length();
        if (length > 0) {
            for (int i = 0; i < length; i++) {
                sha1 = "0" + sha1;
            }
        }
        return sha1;
    }
    catch (IOException e) {
        System.out.println(e);
    }
    catch (NoSuchAlgorithmException e) {
        System.out.println(e);
    }
    finally {
        try {
            if (input != null) {
                input.close();
            }
        }
        catch (IOException e) {
            System.out.println(e);
        }
    }
}

public static String getFileMD5(File file) {
    FileInputStream input = null;
    try {
        input = new FileInputStream(file);
        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[1024 * 1024 * 10];

        int len = 0;
        while ((len = input.read(buffer)) > 0) {
            digest.update(buffer, 0, len);
        }
        String md5 = new BigInteger(1, digest.digest()).toString(16);
        int length = 32 - md5.length();
        if (length > 0) {
            for (int i = 0; i < length; i++) {
                md5 = "0" + md5;
            }
        }
        return md5;
    }
    catch (IOException e) {
        System.out.println(e);
    }
    catch (NoSuchAlgorithmException e) {
        System.out.println(e);
    }
    finally {
        try {
            if (input != null) {
                input.close();
            }
        }
        catch (IOException e) {
            System.out.println(e);
        }
    }
}