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Add minimal Oboe audio library example
Based on the demo in the oboe-rs repo this is a minimal example that runs with GameActivity and plays a 440Hz sine wave
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‎Cargo.toml

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@@ -7,6 +7,7 @@ exclude = [
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"examples/agdk-mainloop",
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"examples/agdk-winit-wgpu",
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"examples/agdk-egui",
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"examples/agdk-oboe",
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"examples/na-mainloop",
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"examples/na-winit-wgpu",
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"examples/na-subclass-jni"

‎examples/agdk-oboe/.gitignore

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties
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*.so
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# Added by cargo
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/target
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Cargo.lock

‎examples/agdk-oboe/.idea/.gitignore

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‎examples/agdk-oboe/.idea/compiler.xml

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‎examples/agdk-oboe/.idea/gradle.xml

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‎examples/agdk-oboe/.idea/misc.xml

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‎examples/agdk-oboe/.idea/vcs.xml

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‎examples/agdk-oboe/Cargo.toml

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[package]
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name = "agdk-oboe"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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log = "0.4"
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android_logger = "0.11.0"
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android-activity = { path="../../android-activity", features = ["game-activity"] }
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oboe = { version = "0.4", features = ["java-interface"] }
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atomic_float = "0.1"
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[lib]
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name="main"
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crate_type=["cdylib"]

‎examples/agdk-oboe/README.md

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This is a minimal test application based on `GameActivity` that just
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runs a mainloop based on android_activity::poll_events() and plays a
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sine wave audio test using the Oboe audio library.
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```
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export ANDROID_NDK_HOME="path/to/ndk"
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export ANDROID_HOME="path/to/sdk"
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rustup target add aarch64-linux-android
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cargo install cargo-ndk
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cargo ndk -t arm64-v8a -o app/src/main/jniLibs/ build
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./gradlew build
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./gradlew installDebug
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adb shell am start -n co.realfit.agdkoboe/.MainActivity
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```

‎examples/agdk-oboe/app/.gitignore

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/build

‎examples/agdk-oboe/app/build.gradle

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plugins {
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id 'com.android.application'
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}
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android {
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compileSdk 31
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defaultConfig {
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applicationId "co.realfit.agdkoboe"
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minSdk 28
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targetSdk 31
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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debug {
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minifyEnabled false
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//packagingOptions {
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// doNotStrip '**/*.so'
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//}
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//debuggable true
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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}
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dependencies {
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implementation 'androidx.appcompat:appcompat:1.4.1'
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implementation 'com.google.android.material:material:1.5.0'
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implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
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testImplementation 'junit:junit:4.13.2'
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androidTestImplementation 'androidx.test.ext:junit:1.1.3'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
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// To use the Android Frame Pacing library
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//implementation "androidx.games:games-frame-pacing:1.9.1"
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// To use the Android Performance Tuner
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//implementation "androidx.games:games-performance-tuner:1.5.0"
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// To use the Games Activity library
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implementation "androidx.games:games-activity:1.1.0"
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// To use the Games Controller Library
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//implementation "androidx.games:games-controller:1.1.0"
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// To use the Games Text Input Library
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//implementation "androidx.games:games-text-input:1.1.0"
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}
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‎examples/agdk-oboe/app/proguard-rules.pro

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

‎examples/agdk-oboe/app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="co.realfit.agdkoboe">
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="AGDK Oboe"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/Theme.RustTemplate">
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<activity
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android:name=".MainActivity"
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android:configChanges="orientation|screenSize|screenLayout|keyboardHidden"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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<meta-data android:name="android.app.lib_name" android:value="main" />
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</activity>
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</application>
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</manifest>

‎examples/agdk-oboe/app/src/main/java/co/realfit/agdkoboe/MainActivity.java

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package co.realfit.agdkoboe;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.core.view.WindowCompat;
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import androidx.core.view.WindowInsetsCompat;
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import androidx.core.view.WindowInsetsControllerCompat;
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import com.google.androidgamesdk.GameActivity;
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import android.os.Bundle;
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import android.content.pm.PackageManager;
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import android.os.Build.VERSION;
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import android.os.Build.VERSION_CODES;
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import android.os.Bundle;
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import android.view.View;
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import android.view.WindowManager;
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public class MainActivity extends GameActivity {
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static {
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// Load the STL first to workaround issues on old Android versions:
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// "if your app targets a version of Android earlier than Android 4.3
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// (Android API level 18),
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// and you use libc++_shared.so, you must load the shared library before any other
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// library that depends on it."
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// See https://developer.android.com/ndk/guides/cpp-support#shared_runtimes
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//System.loadLibrary("c++_shared");
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// Load the native library.
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// The name "android-game" depends on your CMake configuration, must be
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// consistent here and inside AndroidManifect.xml
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System.loadLibrary("main");
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}
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private void hideSystemUI() {
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// This will put the game behind any cutouts and waterfalls on devices which have
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// them, so the corresponding insets will be non-zero.
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if (VERSION.SDK_INT >= VERSION_CODES.P) {
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getWindow().getAttributes().layoutInDisplayCutoutMode
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= WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
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}
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// From API 30 onwards, this is the recommended way to hide the system UI, rather than
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// using View.setSystemUiVisibility.
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View decorView = getWindow().getDecorView();
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WindowInsetsControllerCompat controller = new WindowInsetsControllerCompat(getWindow(),
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decorView);
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controller.hide(WindowInsetsCompat.Type.systemBars());
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controller.hide(WindowInsetsCompat.Type.displayCutout());
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controller.setSystemBarsBehavior(
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WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
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}
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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// When true, the app will fit inside any system UI windows.
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// When false, we render behind any system UI windows.
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WindowCompat.setDecorFitsSystemWindows(getWindow(), false);
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hideSystemUI();
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// You can set IME fields here or in native code using GameActivity_setImeEditorInfoFields.
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// We set the fields in native_engine.cpp.
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// super.setImeEditorInfoFields(InputType.TYPE_CLASS_TEXT,
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// IME_ACTION_NONE, IME_FLAG_NO_FULLSCREEN );
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super.onCreate(savedInstanceState);
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}
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public boolean isGooglePlayGames() {
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PackageManager pm = getPackageManager();
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return pm.hasSystemFeature("com.google.android.play.feature.HPE_EXPERIENCE");
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}
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}

‎examples/agdk-oboe/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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<vector xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:aapt="http://schemas.android.com/aapt"
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android:width="108dp"
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android:height="108dp"
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android:viewportWidth="108"
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android:viewportHeight="108">
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<path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
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<aapt:attr name="android:fillColor">
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<gradient
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android:endX="85.84757"
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android:endY="92.4963"
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android:startX="42.9492"
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android:startY="49.59793"
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android:type="linear">
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<item
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android:color="#44000000"
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android:offset="0.0" />
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<item
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android:color="#00000000"
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android:offset="1.0" />
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</gradient>
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</aapt:attr>
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</path>
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<path
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android:fillColor="#FFFFFF"
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android:fillType="nonZero"
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android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
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android:strokeWidth="1"
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android:strokeColor="#00000000" />
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</vector>

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