[android] Add llama2 example

This patch adds android application example to use llama2 model.
To use this application, nnstreamer-android's service application must be installed to the target device.

Signed-off-by: Yelin Jeong <[email protected]>

android/example_app/llama2/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

android/example_app/llama2/app/.gitignore

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+/build

android/example_app/llama2/app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.jetbrains.kotlin.android)
+}
+
+android {
+    namespace = "com.example.llama2"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.llama2"
+        minSdk = 34
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    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"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.1"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+}

android/example_app/llama2/app/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/example_app/llama2/app/src/androidTest/java/com/example/llama2/ExampleInstrumentedTest.kt

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+package com.example.llama2
+
+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("com.example.llama2", appContext.packageName)
+    }
+}

android/example_app/llama2/app/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"
+    xmlns:tools="http://schemas.android.com/tools">
+    <queries>
+        <package android:name="ai.nnstreamer.ml.inference.offloading" />
+
+        <package android:name="ai.nnstreamer.ml.inference.offloading.MainService" />
+    </queries>
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Llama2"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Llama2">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

android/example_app/llama2/app/src/main/java/com/example/llama2/MainActivity.kt

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+package com.example.llama2
+
+import android.annotation.SuppressLint
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.os.Bundle
+import android.os.Handler
+import android.os.IBinder
+import android.os.Message
+import android.os.Messenger
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.example.llama2.ui.theme.Llama2Theme
+
+@SuppressLint("HandlerLeak")
+class MainActivity : ComponentActivity() {
+    private var mService: Messenger? = null
+    private val result = mutableStateOf("")
+
+    private val handler = object : Handler() {
+        override fun handleMessage(msg: Message) {
+            result.value = msg.data.getString("response").toString()
+        }
+    }
+
+    private val messenger = Messenger(handler)
+
+    private val connection = object : ServiceConnection {
+        override fun onServiceConnected(className: ComponentName, service: IBinder) {
+            mService = Messenger(service)
+        }
+
+        override fun onServiceDisconnected(arg0: ComponentName) {
+            mService = null
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        Intent().apply {
+            setClassName(
+                "ai.nnstreamer.ml.inference.offloading",
+                "ai.nnstreamer.ml.inference.offloading.MainService"
+            )
+        }.also {
+            bindService(it, connection, Context.BIND_AUTO_CREATE)
+        }
+
+        setContent {
+            Llama2Theme {
+                Surface(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(16.dp),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    Column(
+                        modifier = Modifier.height(48.dp),
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                    ) {
+                        var input by remember { mutableStateOf("") }
+
+                        Spacer(modifier = Modifier.height(50.dp))
+                        Text(
+                            text = "Run llama2",
+                            modifier = Modifier
+                                .clickable {
+                                    val message = Message.obtain(null, 4)
+                                    val bundle = Bundle()
+                                    bundle.putString("input", input);
+
+                                    message.data = bundle
+                                    message.replyTo = messenger
+
+                                    mService?.send(
+                                        message
+                                    )
+                                }
+                                .background(Color.LightGray)
+                                .padding(8.dp),
+                            fontSize = 16.sp
+                        )
+
+                        Spacer(modifier = Modifier.height(50.dp))
+
+                        OutlinedTextField(
+                            value = input,
+                            onValueChange = { input = it },
+                            label = { Text("input prompt") }
+                        )
+
+                        Spacer(modifier = Modifier.height(50.dp))
+
+                        val output by result
+
+                        BasicTextField(
+                            value = output,
+                            onValueChange = {},
+                            modifier = Modifier.fillMaxWidth(),
+                            textStyle = TextStyle(
+                                fontSize = 16.sp
+                            ),
+                            singleLine = false,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

android/example_app/llama2/app/src/main/java/com/example/llama2/ui/theme/Color.kt

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+package com.example.llama2.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)

android/example_app/llama2/app/src/main/java/com/example/llama2/ui/theme/Theme.kt

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+package com.example.llama2.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun Llama2Theme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}