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android - 导致 TTS 初始化失败的原因是什么?

转载 作者:行者123 更新时间:2023-12-03 09:43:08 60 4
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在以下场景中观察到 TTS 初始化错误,太随机了。

  • 已安装 TTS 引擎,存在语音集,并且可以从辅助功能选项中播放示例 tts。
  • TTS 初始化在之前初始化和播放的同一设备上随机失败。
  • 在不同的设备(一加、华硕、三星)和各种 Android 操作系统版本中都观察到了此问题。

  • 代码 fragment :

    公共(public)类 TTSHandler 实现 OnInitListener {
    public EPUBReader context;
    private TextToSpeech tts;
    private HashMap<String, String> ttsMap;
    private boolean isTtsPlaying = false,shouldResume = false,initialised = false,
    ttsModeEnabled = false;
    private String textToRead;
    private GoogleVersionPreferences mSharedPreferences;
    private AudioManager mAudioManager;


    @SuppressWarnings("deprecation")
    public TTSHandler(EPUBReader context){

    this.context = context;
    tts = new TextToSpeech(context,this);

    }

    @Override
    public void onInit(int status) {
    Log.d("TTS", "onInit called");
    if(status == TextToSpeech.SUCCESS){

    initialised = true;
    Log.d("TTS", "initialised success: status = "+status);
    initTTSComponents();

    }else{
    initialised = false;
    Log.d("TTS", " initialised failed: status ="+status);
    }

    }

    /**
    * called form JavascriptInterface
    * @param text is the sentence to be read
    */
    public void readText(String text){

    if(text!=null){
    textToRead = text;
    }
    ttsMap = new HashMap<String, String>();
    ttsMap.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, textToRead);
    //for Next/Prev
    isTtsPlaying = true;
    context.runOnUiThread(new Runnable(){
    @Override
    public void run() {
    context.toggleTtsIcons();
    }

    });

    tts.speak(textToRead,0, ttsMap);

    }

    /**
    * called to play,pause or resume tts play.
    */
    public void playPauseReading(){
    context.lockOrientationChange();
    AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    int volume = audio.getStreamVolume(AudioManager.STREAM_MUSIC);

    if(isTtsPlaying){

    isTtsPlaying = false;
    shouldResume = true;
    tts.stop();

    }else{

    isTtsPlaying = true;

    if(shouldResume){
    shouldResume = false;
    requestAudioFocusForTTS();
    JavaScriptInterface.loadJavascript("javascript:resumeUsingTts()", context.getEPUBReaderFragment().getWebview());
    }else{
    requestAudioFocusForTTS();
    if(volume <= 1){
    Toast.makeText(context,context.getResources().getString(R.string.tts_volume_alert), 300).show();
    }
    int dir = mSharedPreferences.getEpubNavigationSetting(context.bookId);
    JavaScriptInterface.loadJavascript("javascript:playFromRange("+dir+")", context.getEPUBReaderFragment().getWebview());

    }
    }
    context.toggleTtsIcons();
    }

    /**
    * called to stop playing tts
    * highlight will be removed and we will hide the tts controls
    */
    public void stopReading(){

    if(tts !=null && ttsModeEnabled){
    isTtsPlaying = false;
    shouldResume = false;
    ttsModeEnabled = false;
    tts.stop();
    Toast.makeText(context,context.getResources().getString(R.string.tts_stop) , 300).show();
    JavaScriptInterface.loadJavascript("javascript:stopUsingTts()",
    context.getEPUBReaderFragment().getWebview());
    abandonAudioFocus();
    context.runOnUiThread(new Runnable(){

    @Override
    public void run() {
    context.toggleControlPanel(false);
    context.unlockOrientationChange();
    context.invalidateOptionsMenu();
    }

    });


    }
    }


    /**
    * To check the whether tts is playing or not
    * @return
    */
    public boolean isReading(){
    if(tts.isSpeaking()){
    return true;
    }
    return false;
    }

    /**
    * called from javascriptInterface at the end of a chapter
    *
    */
    public void stopReadingOnEndOfChapter(){

    Log.d("TTS", "stopReadingOnEndOfChapter");
    shouldResume = false;
    isTtsPlaying = false;
    ttsModeEnabled = false;
    abandonAudioFocus();
    context.runOnUiThread(new Runnable(){

    @Override
    public void run() {
    context.toggleControlPanel(false);
    context.unlockOrientationChange();
    context.invalidateOptionsMenu();
    Toast.makeText(context,context.getResources().getString(R.string.end_of_chapter) , 300).show();

    }});


    }

    /**
    * called from javascriptInterface to disable tts mode when the chapter doesnt have any text content.
    */
    public void stopOnNoContent(){

    Toast.makeText(context,context.getResources().getString(R.string.tts_no_content) , 300).show();
    shouldResume = false;
    isTtsPlaying = false;
    ttsModeEnabled = false;
    abandonAudioFocus();
    context.runOnUiThread(new Runnable(){

    @Override
    public void run() {
    context.toggleControlPanel(false);
    context.unlockOrientationChange();
    context.invalidateOptionsMenu();

    }});
    }

    /**
    * called from javascript to stop tts while user taps on links
    */
    public void stopTtsOnLinks(){

    if(isReading() || shouldResume)
    Toast.makeText(context,context.getResources().getString(R.string.tts_stop) , 300).show();

    shouldResume = false;
    isTtsPlaying = false;
    ttsModeEnabled = false;
    tts.stop();
    context.toggleControlPanel(false);
    context.unlockOrientationChange();
    abandonAudioFocus();

    }

    /**
    * Will release the resources used by the TTS engine
    */
    public void shutDownTTS(){
    if(tts !=null){
    tts.shutdown();
    }
    }

    /**
    * called from EPUBReader to set the speech rate
    * @param speechRate
    */
    public void setSpeechRate(int value){

    switch(value){
    case 0:
    tts.setSpeechRate((float)0.1);
    break;
    case 1:
    tts.setSpeechRate((float)0.5);
    break;
    case 2:
    tts.setSpeechRate((float)1);
    break;
    case 3:
    tts.setSpeechRate((float)1.5);
    break;
    case 4:
    tts.setSpeechRate((float)2);
    break;

    }

    }

    /**
    * called form EPUBReader to start playing the next line
    */
    public void playNext(){
    isTtsPlaying = false;
    tts.stop();
    JavaScriptInterface.loadJavascript("javascript:readNext()",context.getEPUBReaderFragment().getWebview());
    }

    /**
    * called form EPUBReader to start playing the previous line
    */
    public void playPrevious(){
    isTtsPlaying = false;
    tts.stop();
    JavaScriptInterface.loadJavascript("javascript:playPrevious()",context.getEPUBReaderFragment().getWebview());
    }

    /**
    * if TTS engine is initialised successfully,
    * we will set the listener and other components.
    */
    private void initTTSComponents(){

    mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    tts.setSpeechRate(1);
    mSharedPreferences = GoogleVersionPreferences.getGoogleAppVersion(context);

    tts.setOnUtteranceProgressListener(new UtteranceProgressListener() {

    @Override
    public void onStart(String utteranceId) {
    Log.d("TTS", "onStart:"+utteranceId);
    }

    @Override
    public void onError(String utteranceId) {
    Log.d("TTS", "onError ID:"+utteranceId);

    }

    @Override
    public void onDone(String utteranceId) {
    Log.d("BUG", "onDone, isTtsPlaying:"+isTtsPlaying);
    if(isTtsPlaying){
    JavaScriptInterface.loadJavascript("javascript:readNext();",
    ((EPUBReader) context).getEPUBReaderFragment().getWebview());
    }
    }

    });

    }

    /**
    * Requests audio focus so that when TTS starts
    * other audio apps will be paused/ducked as per the app.
    */
    private void requestAudioFocusForTTS(){

    mAudioManager.requestAudioFocus(null,AudioManager.STREAM_MUSIC , AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE);
    }

    /**
    *Will abandon the received audio Focus so that the
    *previous app can attain it.
    */
    private void abandonAudioFocus(){

    mAudioManager.abandonAudioFocus(null);
    }




    /**
    * getters and setters
    * @param value
    */
    public void setisTtsPlaying(boolean value){
    isTtsPlaying = value;
    }

    public boolean isTtsPlaying(){
    return isTtsPlaying;
    }

    public void setshouldResume(boolean value){
    shouldResume = value;
    }

    public boolean shouldResume(){
    return shouldResume;
    }

    public boolean isTtsInitialised(){
    return initialised;
    }

    public boolean ttsModeEnabled(){
    return ttsModeEnabled;
    }

    public void setttsModeEnabled(boolean value){
    ttsModeEnabled = value;
    }

    }

    注意:收集的日志:

    对于三星设备(TabS 10.5 OS:5.0.2):
    E/SamsungTTS(20259):onLoadLanguage() - SamsungTTS 尚未准备好。

    一加一(操作系统:6.0.1):

    08-08 18:54:53.112:W/TextToSpeech(22946):停止失败:TTS 引擎连接未完全建立
    08-08 18:56:15.869: I/TextToSpeech(22946): 成功绑定(bind)到 com.google.android.tts
    08-08 18:56:16.060: I/TextToSpeech(22946): 连接到 ComponentInfo{com.google.android.tts/com.google.android.tts.service.GoogleTTSService}

    最佳答案

    我的 TTS 初始化失败,因为我使用的是 Android 11 模拟器,它需要在 Android list 中提及

    <queries>
    <intent>
    <action android:name="android.intent.action.TTS_SERVICE" />
    </intent>
    </queries>

    关于android - 导致 TTS 初始化失败的原因是什么?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38560066/

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