Replace Android system TTS engine (#508)

android/SherpaOnnxTtsEngine/app/src/main/AndroidManifest.xml

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <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.SherpaOnnxTtsEngine"
+        tools:targetApi="31">
+        <activity
+            android:name=".GetSampleText"
+            android:exported="true"
+            android:theme="@android:style/Theme.Translucent.NoTitleBar">
+            <intent-filter>
+                <action android:name="android.speech.tts.engine.GET_SAMPLE_TEXT" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".CheckVoiceData"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.speech.tts.engine.CHECK_TTS_DATA" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".InstallVoiceData"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.speech.tts.engine.INSTALL_TTS_DATA" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".TtsService"
+            android:enabled="true"
+            android:exported="true"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.TTS_SERVICE" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.speech.tts"
+                android:resource="@xml/tts_engine" />
+        </service>
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.SherpaOnnxTtsEngine">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.speech.tts.engine.CONFIGURE_ENGINE" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/CheckVoiceData.kt

@@ -0,0 +1,18 @@
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.speech.tts.TextToSpeech
+
+class CheckVoiceData : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val intent = Intent().apply {
+            putStringArrayListExtra(TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES, arrayListOf(TtsEngine.lang))
+            putStringArrayListExtra(TextToSpeech.Engine.EXTRA_UNAVAILABLE_VOICES, arrayListOf())
+        }
+        setResult(TextToSpeech.Engine.CHECK_VOICE_DATA_PASS, intent)
+        finish()
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/GetSampleText.kt

@@ -0,0 +1,37 @@
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.app.Activity
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.speech.tts.TextToSpeech
+
+class GetSampleText : Activity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        var result = TextToSpeech.LANG_AVAILABLE
+        var text: String = ""
+        when(TtsEngine.lang) {
+            "eng" -> {
+                text = "This is a text-to-speech engine with next generation Kaldi"
+            }
+            "zho", "cmn" -> {
+                text = "使用新一代 Kaldi 进行语音合成"
+            }
+            else -> {
+                result = TextToSpeech.LANG_NOT_SUPPORTED
+            }
+        }
+
+        val intent = Intent().apply{
+            if(result == TextToSpeech.LANG_AVAILABLE) {
+                putExtra(TextToSpeech.Engine.EXTRA_SAMPLE_TEXT, text)
+            } else {
+                putExtra("sampleText", text)
+            }
+        }
+
+        setResult(result, intent)
+        finish()
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/InstallVoiceData.kt

@@ -0,0 +1,12 @@
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.app.Activity
+import android.os.Bundle
+import android.view.Window
+
+class InstallVoiceData : Activity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        requestWindowFeature(Window.FEATURE_NO_TITLE)
+        super.onCreate(savedInstanceState)
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/MainActivity.kt

@@ -0,0 +1,141 @@
+@file:OptIn(ExperimentalMaterial3Api::class)
+
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.media.MediaPlayer
+import android.net.Uri
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.wrapContentHeight
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Slider
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.k2fsa.sherpa.onnx.tts.engine.ui.theme.SherpaOnnxTtsEngineTheme
+import java.io.File
+
+const val TAG = "sherpa-onnx-tts-engine"
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        TtsEngine.createTts(this.application)
+        setContent {
+            SherpaOnnxTtsEngineTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    Scaffold(topBar = {
+                        TopAppBar(title = { Text("Next-gen Kaldi: TTS") })
+                    }) {
+                        Box(modifier = Modifier.padding(it)) {
+                            Column {
+                                Row {
+                                    Text("Speed")
+                                    Slider(
+                                        value = TtsEngine.speedState.value,
+                                        onValueChange = { TtsEngine.speed = it },
+                                        valueRange = 0.2F..3.0F
+                                    )
+                                }
+                                var testText by remember { mutableStateOf("") }
+
+                                OutlinedTextField(value = testText,
+                                    onValueChange = { testText = it },
+                                            label = { Text ("Test text") },
+                                    modifier = Modifier.fillMaxWidth().wrapContentHeight().padding(16.dp),
+                                    singleLine = false,
+                                )
+
+                                val numSpeakers = TtsEngine.tts!!.numSpeakers()
+                                if (numSpeakers > 1) {
+                                    Row {
+                                        Text("Speaker ID: (0-${numSpeakers - 1})")
+                                        Slider(
+                                            value = TtsEngine.speakerIdState.value.toFloat(),
+                                            onValueChange = { TtsEngine.speakerId = it.toInt() },
+                                            valueRange = 0.0f..(numSpeakers - 1).toFloat(),
+                                            steps = 1
+                                        )
+                                    }
+                                }
+                                Row {
+                                    Button(
+                                        modifier = Modifier.padding(20.dp),
+                                        onClick = {
+                                            Log.i(TAG, "Clicked, text: ${testText}")
+                                            if (testText.isBlank() || testText.isEmpty()) {
+                                                Toast.makeText(
+                                                    applicationContext,
+                                                    "Please input a test sentence",
+                                                    Toast.LENGTH_SHORT
+                                                ).show()
+                                            } else {
+                                                val audio = TtsEngine.tts!!.generate(
+                                                    text = testText,
+                                                    sid = TtsEngine.speakerId,
+                                                    speed = TtsEngine.speed,
+                                                )
+
+                                                val filename =
+                                                    application.filesDir.absolutePath + "/generated.wav"
+                                                val ok =
+                                                    audio.samples.size > 0 && audio.save(filename)
+
+                                                if (ok) {
+                                                    val mediaPlayer = MediaPlayer.create(
+                                                        applicationContext,
+                                                        Uri.fromFile(File(filename))
+                                                    )
+                                                    mediaPlayer.start()
+                                                } else {
+                                                    Log.i(TAG, "Failed to generate or save audio")
+                                                }
+                                            }
+                                        }) {
+                                        Text("Test")
+                                    }
+
+                                    Button(
+                                        modifier = Modifier.padding(20.dp),
+                                        onClick = {
+                                            TtsEngine.speakerId = 0
+                                            TtsEngine.speed = 1.0f
+                                            testText = ""
+                                        }) {
+                                        Text("Reset")
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/Tts.kt

@@ -0,0 +1 @@
+../../../../../../../../../../../SherpaOnnxTts/app/src/main/java/com/k2fsa/sherpa/onnx/Tts.kt

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/TtsEngine.kt

@@ -0,0 +1,158 @@
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.app.Application
+import android.content.res.AssetManager
+import android.util.Log
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
+import com.k2fsa.sherpa.onnx.*
+import java.io.File
+import java.io.FileOutputStream
+import java.io.IOException
+
+object TtsEngine {
+    var tts: OfflineTts? = null
+
+    // https://en.wikipedia.org/wiki/ISO_639-3
+    // Example:
+    // eng for English,
+    // deu for German
+    // cmn for Mandarin
+    var lang: String? = null
+
+
+
+    val speedState: MutableState<Float> = mutableStateOf(1.0F)
+    val speakerIdState: MutableState<Int> = mutableStateOf(0)
+
+    var speed: Float
+        get() = speedState.value
+        set(value) {
+            speedState.value = value
+        }
+
+    var speakerId: Int
+        get() = speakerIdState.value
+        set(value) {
+            speakerIdState.value = value
+        }
+
+    private var modelDir: String? = null
+    private var modelName: String? = null
+    private var ruleFsts: String? = null
+    private var lexicon: String? = null
+    private var dataDir: String? = null
+    private var assets: AssetManager? = null
+
+    private var application: Application? = null
+
+    fun createTts(application: Application) {
+        Log.i(TAG, "Init Next-gen Kaldi TTS")
+        if (tts == null) {
+            this.application = application
+            initTts()
+        }
+    }
+
+    private fun initTts() {
+        assets = application?.assets
+
+        // The purpose of such a design is to make the CI test easier
+        // Please see
+        // https://github.com/k2-fsa/sherpa-onnx/blob/master/scripts/apk/generate-tts-apk-script.py
+        modelDir = null
+        modelName = null
+        ruleFsts = null
+        lexicon = null
+        dataDir = null
+        lang = null
+
+        // Please enable one and only one of the examples below
+
+        // Example 1:
+        // modelDir = "vits-vctk"
+        // modelName = "vits-vctk.onnx"
+        // lexicon = "lexicon.txt"
+        // lang = "eng"
+
+        // Example 2:
+        // https://github.com/k2-fsa/sherpa-onnx/releases/tag/tts-models
+        // https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/vits-piper-en_US-amy-low.tar.bz2
+        // modelDir = "vits-piper-en_US-amy-low"
+        // modelName = "en_US-amy-low.onnx"
+        // dataDir = "vits-piper-en_US-amy-low/espeak-ng-data"
+        // lang = "eng"
+
+        // Example 3:
+        // modelDir = "vits-zh-aishell3"
+        // modelName = "vits-aishell3.onnx"
+        // ruleFsts = "vits-zh-aishell3/rule.fst"
+        // lexcion = "lexicon.txt"
+        // lang = "zho"
+
+        if (dataDir != null) {
+            val newDir = copyDataDir(modelDir!!)
+            modelDir = newDir + "/" + modelDir
+            dataDir = newDir + "/" + dataDir
+            assets = null
+        }
+
+        val config = getOfflineTtsConfig(
+            modelDir = modelDir!!, modelName = modelName!!, lexicon = lexicon ?: "",
+            dataDir = dataDir ?: "",
+            ruleFsts = ruleFsts ?: ""
+        )!!
+
+        tts = OfflineTts(assetManager = assets, config = config)
+    }
+
+
+    private fun copyDataDir(dataDir: String): String {
+        println("data dir is $dataDir")
+        copyAssets(dataDir)
+
+        val newDataDir = application!!.getExternalFilesDir(null)!!.absolutePath
+        println("newDataDir: $newDataDir")
+        return newDataDir
+    }
+
+    private fun copyAssets(path: String) {
+        val assets: Array<String>?
+        try {
+            assets = application!!.assets.list(path)
+            if (assets!!.isEmpty()) {
+                copyFile(path)
+            } else {
+                val fullPath = "${application!!.getExternalFilesDir(null)}/$path"
+                val dir = File(fullPath)
+                dir.mkdirs()
+                for (asset in assets.iterator()) {
+                    val p: String = if (path == "") "" else path + "/"
+                    copyAssets(p + asset)
+                }
+            }
+        } catch (ex: IOException) {
+            Log.e(TAG, "Failed to copy $path. ${ex.toString()}")
+        }
+    }
+
+    private fun copyFile(filename: String) {
+        try {
+            val istream = application!!.assets.open(filename)
+            val newFilename = application!!.getExternalFilesDir(null).toString() + "/" + filename
+            val ostream = FileOutputStream(newFilename)
+            // Log.i(TAG, "Copying $filename to $newFilename")
+            val buffer = ByteArray(1024)
+            var read = 0
+            while (read != -1) {
+                ostream.write(buffer, 0, read)
+                read = istream.read(buffer)
+            }
+            istream.close()
+            ostream.flush()
+            ostream.close()
+        } catch (ex: Exception) {
+            Log.e(TAG, "Failed to copy $filename, ${ex.toString()}")
+        }
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/TtsService.kt

@@ -0,0 +1,155 @@
+package com.k2fsa.sherpa.onnx.tts.engine
+
+import android.media.AudioFormat
+import android.speech.tts.SynthesisCallback
+import android.speech.tts.SynthesisRequest
+import android.speech.tts.TextToSpeech
+import android.speech.tts.TextToSpeechService
+import android.util.Log
+import com.k2fsa.sherpa.onnx.*
+
+/*
+https://developer.android.com/reference/java/util/Locale#getISO3Language()
+https://developer.android.com/reference/java/util/Locale#getISO3Country()
+
+eng, USA,
+eng, USA, POSIX
+eng,
+eng, GBR
+afr,
+afr, NAM
+afr, ZAF
+agq
+agq, CMR
+aka,
+aka, GHA
+amh,
+amh, ETH
+ara,
+ara, 001
+ara, ARE
+ara, BHR,
+deu
+deu, AUT
+deu, BEL
+deu, CHE
+deu, ITA
+deu, ITA
+deu, LIE
+deu, LUX
+spa,
+spa, 419
+spa, ARG,
+spa, BRA
+fra,
+fra, BEL,
+fra, FRA,
+
+E  Failed to check TTS data, no activity found for Intent
+{ act=android.speech.tts.engine.CHECK_TTS_DATA pkg=com.k2fsa.sherpa.chapter5 })
+
+E Failed to get default language from engine com.k2fsa.sherpa.chapter5
+Engine failed voice data integrity check (null return)com.k2fsa.sherpa.chapter5
+Failed to get default language from engine com.k2fsa.sherpa.chapter5
+
+*/
+
+class TtsService : TextToSpeechService() {
+    override fun onCreate() {
+        super.onCreate()
+
+        // see https://github.com/Miserlou/Android-SDK-Samples/blob/master/TtsEngine/src/com/example/android/ttsengine/RobotSpeakTtsService.java#L68
+        onLoadLanguage(TtsEngine.lang, "", "")
+    }
+
+    // https://developer.android.com/reference/kotlin/android/speech/tts/TextToSpeechService#onislanguageavailable
+    override fun onIsLanguageAvailable(_lang: String?, _country: String?, _variant: String?): Int {
+        val lang = _lang ?: ""
+
+        if (lang == TtsEngine.lang) {
+            return TextToSpeech.LANG_AVAILABLE
+        }
+
+        return TextToSpeech.LANG_NOT_SUPPORTED
+    }
+
+    override fun onGetLanguage(): Array<String> {
+        return arrayOf(TtsEngine.lang!!, "", "")
+    }
+
+    // https://developer.android.com/reference/kotlin/android/speech/tts/TextToSpeechService#onLoadLanguage(kotlin.String,%20kotlin.String,%20kotlin.String)
+    override fun onLoadLanguage(_lang: String?, _country: String?, _variant: String?): Int {
+        val lang = _lang ?: ""
+
+        if (lang == TtsEngine.lang) {
+            TtsEngine.createTts(application)
+            return TextToSpeech.LANG_AVAILABLE
+        } else {
+            return TextToSpeech.LANG_NOT_SUPPORTED
+        }
+    }
+
+    override fun onStop() {}
+
+    override fun onSynthesizeText(request: SynthesisRequest?, callback: SynthesisCallback?) {
+        if (request == null || callback == null) {
+            return
+        }
+        val language = request.language
+        val country = request.country
+        val variant = request.variant
+        val text = request.charSequenceText.toString()
+
+        val ret = onIsLanguageAvailable(language, country, variant)
+        if (ret == TextToSpeech.LANG_NOT_SUPPORTED) {
+            callback.error()
+            return
+        }
+        Log.i(TAG, "text: $text")
+        val tts = TtsEngine.tts!!
+
+        // Note that AudioFormat.ENCODING_PCM_FLOAT requires API level >= 24
+        // callback.start(tts.sampleRate(), AudioFormat.ENCODING_PCM_FLOAT, 1)
+
+        callback.start(tts.sampleRate(), AudioFormat.ENCODING_PCM_16BIT, 1)
+
+        if (text.isBlank() || text.isEmpty()) {
+            callback.done()
+            return
+        }
+
+        val ttsCallback = {floatSamples: FloatArray ->
+            // convert FloatArray to ByteArray
+            val samples = floatArrayToByteArray(floatSamples)
+            val maxBufferSize: Int = callback.maxBufferSize
+            var offset = 0
+            while (offset < samples.size) {
+                val bytesToWrite = Math.min(maxBufferSize, samples.size - offset)
+                callback.audioAvailable(samples, offset, bytesToWrite)
+                offset += bytesToWrite
+            }
+
+        }
+
+        Log.i(TAG, "text: $text")
+        tts.generateWithCallback(
+            text = text,
+            sid = TtsEngine.speakerId,
+            speed = TtsEngine.speed,
+            callback=ttsCallback,
+        )
+
+        callback.done()
+    }
+
+    private fun floatArrayToByteArray(audio: FloatArray): ByteArray {
+        // byteArray is actually a ShortArray
+        val byteArray = ByteArray(audio.size * 2)
+        for (i in audio.indices) {
+            val sample = (audio[i] * 32767).toInt()
+            byteArray[2 * i] = sample.toByte()
+            byteArray[2 * i + 1] = (sample shr 8).toByte()
+        }
+        return byteArray
+    }
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/ui/theme/Color.kt

@@ -0,0 +1,11 @@
+package com.k2fsa.sherpa.onnx.tts.engine.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/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/ui/theme/Theme.kt

@@ -0,0 +1,70 @@
+package com.k2fsa.sherpa.onnx.tts.engine.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.runtime.SideEffect
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+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 SherpaOnnxTtsEngineTheme(
+    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
+    }
+    val view = LocalView.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            val window = (view.context as Activity).window
+            window.statusBarColor = colorScheme.primary.toArgb()
+            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
+        }
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}

android/SherpaOnnxTtsEngine/app/src/main/java/com/k2fsa/sherpa/onnx/tts/engine/ui/theme/Type.kt

@@ -0,0 +1,34 @@
+package com.k2fsa.sherpa.onnx.tts.engine.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)

android/SherpaOnnxTtsEngine/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <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">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        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"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

android/SherpaOnnxTtsEngine/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

android/SherpaOnnxTtsEngine/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

android/SherpaOnnxTtsEngine/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Next-gen Kaldi: TTS</string>
+</resources>

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.SherpaOnnxTtsEngine" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>

android/SherpaOnnxTtsEngine/app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older that API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

android/SherpaOnnxTtsEngine/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>

android/SherpaOnnxTtsEngine/app/src/main/res/xml/tts_engine.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<tts-engine xmlns:android="http://schemas.android.com/apk/res/android"
+    android:settingsActivity="com.k2fsa.sherpa.onnx.tts.engine.MainActivity"
+    >
+</tts-engine>