chore: init

android/.gitignore

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+/build
+/.tauri

android/build.gradle.kts

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+plugins {
+    id("com.android.library")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "de.cfp.duck"
+    compileSdk = 36
+
+    defaultConfig {
+        minSdk = 21
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+
+    implementation("androidx.core:core-ktx:1.9.0")
+    implementation("androidx.appcompat:appcompat:1.6.0")
+    implementation("com.google.android.material:material:1.7.0")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+    implementation(project(":tauri-android"))
+}

android/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

android/settings.gradle

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+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        google()
+    }
+    resolutionStrategy {
+        eachPlugin {
+            switch (requested.id.id) {
+                case "com.android.library":
+                    useVersion("8.0.2")
+                    break
+                case "org.jetbrains.kotlin.android":
+                    useVersion("1.8.20")
+                    break
+            }
+        }
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        mavenCentral()
+        google()
+
+    }
+}
+
+include ':tauri-android'
+project(':tauri-android').projectDir = new File('./.tauri/tauri-api')

android/src/androidTest/java/ExampleInstrumentedTest.kt

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+package de.cfp.duck
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("de.cfp.duck", appContext.packageName)
+    }
+}

android/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+</manifest>

android/src/main/java/Duck.kt

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+package de.cfp.duck
+
+import android.util.Log
+
+class Duck {
+    fun pong(value: String): String {
+        Log.i("Pong", value)
+        return value
+    }
+}

android/src/main/java/DuckPlugin.kt

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+package de.cfp.duck
+
+import android.app.Activity
+import app.tauri.annotation.Command
+import app.tauri.annotation.InvokeArg
+import app.tauri.annotation.TauriPlugin
+import app.tauri.plugin.JSObject
+import app.tauri.plugin.Plugin
+import app.tauri.plugin.Invoke
+
+import android.media.AudioFocusRequest
+import android.media.AudioManager
+import android.context.Context
+import android.webkit.WebView
+
+@TauriPlugin
+class DuckPlugin(private val activity: Activity): Plugin(activity) {
+    private val implementation = Duck()
+    private lateinit var audioManager: AudioManager
+    private lateinit var focusRequest: AudioFocusRequest
+
+    override fun load(webView: WebView) {
+      audioManager = (AudioManager) getBridge().getActivity().getSystemService(Context.AUDIO_SERVICE)
+    }
+
+    @Command
+    fun duck(invoke: Invoke) {
+        focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK)
+          .setAcceptsDelayedFocusGain(false)
+          .setWillPauseWhenDucked(false)
+          .setForceDucking(true)
+          .build()
+        
+        audioManager.requestAudioFocus(focusRequest)
+
+        val ret = JSObject()
+        ret.put("success", true)
+        invoke.resolve(ret)
+    }
+
+    @Command
+    fun unduck(invoke: Invoke) {
+        if (focusRequest != null) {
+            audioManager.abandonAudioFocusRequest(focusRequest)
+        }
+
+        val ret = JSObject()
+        ret.put("success", true)
+        invoke.resolve(ret)
+    }
+}

android/src/test/java/ExampleUnitTest.kt

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+package de.cfp.duck
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}