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Add VAD + Non-streaming ASR model for Android (#336)

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This commit is contained in:
Fangjun Kuang
2023-09-23 22:48:38 +08:00
committed by GitHub
parent 6e60a77d89
commit 4ca60e2603
48 changed files with 1093 additions and 7 deletions
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24
android/SherpaOnnxVadAsr/app/src/androidTest/java/com/k2fsa/sherpa/onnx/ExampleInstrumentedTest.kt Normal file
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package com.k2fsa.sherpa.onnx
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.k2fsa.sherpa.onnx", appContext.packageName)
}
}

32
android/SherpaOnnxVadAsr/app/src/main/AndroidManifest.xml Normal file
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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">
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<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.SherpaOnnxVadAsr"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>

1
android/SherpaOnnxVadAsr/app/src/main/assets/.gitignore vendored Normal file
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*.onnx

213
android/SherpaOnnxVadAsr/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt Normal file
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package com.k2fsa.sherpa.onnx
import android.Manifest
import android.content.pm.PackageManager
import android.media.AudioFormat
import android.media.AudioRecord
import android.media.MediaRecorder
import android.os.Bundle
import android.text.method.ScrollingMovementMethod
import android.util.Log
import android.view.View
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import kotlin.concurrent.thread
private const val TAG = "sherpa-onnx"
private const val REQUEST_RECORD_AUDIO_PERMISSION = 200
class MainActivity : AppCompatActivity() {
private lateinit var recordButton: Button
private lateinit var textView: TextView
private lateinit var vad: Vad
private var audioRecord: AudioRecord? = null
private var recordingThread: Thread? = null
private val audioSource = MediaRecorder.AudioSource.MIC
private val sampleRateInHz = 16000
private val channelConfig = AudioFormat.CHANNEL_IN_MONO
// Note: We don't use AudioFormat.ENCODING_PCM_FLOAT
// since the AudioRecord.read(float[]) needs API level >= 23
// but we are targeting API level >= 21
private val audioFormat = AudioFormat.ENCODING_PCM_16BIT
private val permissions: Array<String> = arrayOf(Manifest.permission.RECORD_AUDIO)
// Non-streaming ASR
private lateinit var offlineRecognizer: SherpaOnnxOffline
private var idx: Int = 0
private var lastText: String = ""
@Volatile
private var isRecording: Boolean = false
override fun onRequestPermissionsResult(
requestCode: Int, permissions: Array<String>, grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
val permissionToRecordAccepted = if (requestCode == REQUEST_RECORD_AUDIO_PERMISSION) {
grantResults[0] == PackageManager.PERMISSION_GRANTED
} else {
false
}
if (!permissionToRecordAccepted) {
Log.e(TAG, "Audio record is disallowed")
finish()
}
Log.i(TAG, "Audio record is permitted")
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
ActivityCompat.requestPermissions(this, permissions, REQUEST_RECORD_AUDIO_PERMISSION)
Log.i(TAG, "Start to initialize model")
initVadModel()
Log.i(TAG, "Finished initializing model")
Log.i(TAG, "Start to initialize non-streaimng recognizer")
initOfflineRecognizer()
Log.i(TAG, "Finished initializing non-streaming recognizer")
recordButton = findViewById(R.id.record_button)
recordButton.setOnClickListener { onclick() }
textView = findViewById(R.id.my_text)
textView.movementMethod = ScrollingMovementMethod()
}
private fun onclick() {
if (!isRecording) {
val ret = initMicrophone()
if (!ret) {
Log.e(TAG, "Failed to initialize microphone")
return
}
Log.i(TAG, "state: ${audioRecord?.state}")
audioRecord!!.startRecording()
recordButton.setText(R.string.stop)
isRecording = true
textView.text = ""
lastText = ""
idx = 0
vad.reset()
recordingThread = thread(true) {
processSamples()
}
Log.i(TAG, "Started recording")
} else {
isRecording = false
audioRecord!!.stop()
audioRecord!!.release()
audioRecord = null
recordButton.setText(R.string.start)
Log.i(TAG, "Stopped recording")
}
}
private fun initVadModel() {
val type = 0
println("Select VAD model type ${type}")
val config = getVadModelConfig(type)
vad = Vad(
assetManager = application.assets,
config = config!!,
)
}
private fun initMicrophone(): Boolean {
if (ActivityCompat.checkSelfPermission(
this, Manifest.permission.RECORD_AUDIO
) != PackageManager.PERMISSION_GRANTED
) {
ActivityCompat.requestPermissions(this, permissions, REQUEST_RECORD_AUDIO_PERMISSION)
return false
}
val numBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat)
Log.i(
TAG, "buffer size in milliseconds: ${numBytes * 1000.0f / sampleRateInHz}"
)
audioRecord = AudioRecord(
audioSource,
sampleRateInHz,
channelConfig,
audioFormat,
numBytes * 2 // a sample has two bytes as we are using 16-bit PCM
)
return true
}
private fun processSamples() {
Log.i(TAG, "processing samples")
val bufferSize = 512 // in samples
val buffer = ShortArray(bufferSize)
while (isRecording) {
val ret = audioRecord?.read(buffer, 0, buffer.size)
if (ret != null && ret > 0) {
val samples = FloatArray(ret) { buffer[it] / 32768.0f }
vad.acceptWaveform(samples)
while(!vad.empty()) {
var objArray = vad.front()
val samples = objArray[1] as FloatArray
val text = runSecondPass(samples)
if (text.isNotBlank()) {
lastText = "${lastText}\n${idx}: ${text}"
idx += 1
}
vad.pop();
}
val isSpeechDetected = vad.isSpeechDetected()
runOnUiThread {
textView.text = lastText.lowercase()
}
}
}
}
private fun initOfflineRecognizer() {
// Please change getOfflineModelConfig() to add new models
// See https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
// for a list of available models
val secondType = 0
println("Select model type ${secondType} for the second pass")
val config = OfflineRecognizerConfig(
featConfig = getFeatureConfig(sampleRate = sampleRateInHz, featureDim = 80),
modelConfig = getOfflineModelConfig(type = secondType)!!,
)
offlineRecognizer = SherpaOnnxOffline(
assetManager = application.assets,
config = config,
)
}
private fun runSecondPass(samples: FloatArray): String {
return offlineRecognizer.decode(samples, sampleRateInHz)
}
}

1
android/SherpaOnnxVadAsr/app/src/main/java/com/k2fsa/sherpa/onnx/SherpaOnnx.kt Symbolic link
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../../../../../../../../../SherpaOnnx2Pass/app/src/main/java/com/k2fsa/sherpa/onnx/SherpaOnnx.kt

1
android/SherpaOnnxVadAsr/app/src/main/java/com/k2fsa/sherpa/onnx/Vad.kt Symbolic link
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../../../../../../../../../SherpaOnnxVad/app/src/main/java/com/k2fsa/sherpa/onnx/Vad.kt

0
android/SherpaOnnxVadAsr/app/src/main/jniLibs/arm64-v8a/.gitkeep Normal file
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0
android/SherpaOnnxVadAsr/app/src/main/jniLibs/armeabi-v7a/.gitkeep Normal file
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0
android/SherpaOnnxVadAsr/app/src/main/jniLibs/x86/.gitkeep Normal file
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0
android/SherpaOnnxVadAsr/app/src/main/jniLibs/x86_64/.gitkeep Normal file
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30
android/SherpaOnnxVadAsr/app/src/main/res/drawable-v24/ic_launcher_foreground.xml Normal file
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<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>

170
android/SherpaOnnxVadAsr/app/src/main/res/drawable/ic_launcher_background.xml Normal file
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<?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>

39
android/SherpaOnnxVadAsr/app/src/main/res/layout/activity_main.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/my_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2.5"
android:padding="24dp"
android:scrollbars="vertical"
android:singleLine="false"
android:text="@string/hint"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:gravity="bottom"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/record_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="@string/start" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

5
android/SherpaOnnxVadAsr/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml Normal file
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<?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" />
</adaptive-icon>

5
android/SherpaOnnxVadAsr/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml Normal file
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<?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" />
</adaptive-icon>

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android/SherpaOnnxVadAsr/app/src/main/res/values-night/themes.xml Normal file
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<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.SherpaOnnxVadAsr" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_200</item>
<item name="colorPrimaryVariant">@color/purple_700</item>
<item name="colorOnPrimary">@color/black</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_200</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
</resources>

10
android/SherpaOnnxVadAsr/app/src/main/res/values/colors.xml Normal file
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<?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>

13
android/SherpaOnnxVadAsr/app/src/main/res/values/strings.xml Normal file
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<resources>
<string name="app_name">ASR with Next-gen Kaldi</string>
<string name="hint">Click the Start button to play speech-to-text with Next-gen Kaldi.
\n
\n\n\n
The source code and pre-trained models are publicly available.
Please see https://github.com/k2-fsa/sherpa-onnx for details.
\n\n
Speech recognition with Next-gen Kaldi using VAD and non-streaming ASR models.
</string>
<string name="start">Start</string>
<string name="stop">Stop</string>
</resources>

16
android/SherpaOnnxVadAsr/app/src/main/res/values/themes.xml Normal file
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<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.SherpaOnnxVadAsr" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_500</item>
<item name="colorPrimaryVariant">@color/purple_700</item>
<item name="colorOnPrimary">@color/white</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_700</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
</resources>

13
android/SherpaOnnxVadAsr/app/src/main/res/xml/backup_rules.xml Normal file
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<?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>

19
android/SherpaOnnxVadAsr/app/src/main/res/xml/data_extraction_rules.xml Normal file
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<?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>

17
android/SherpaOnnxVadAsr/app/src/test/java/com/k2fsa/sherpa/onnx/ExampleUnitTest.kt Normal file
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package com.k2fsa.sherpa.onnx
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)
}
}