如何知道TTS什么时候结束？

Question

我正在Android上实现交互式语音应答应用程序.我想知道如何确定tts.speak()函数何时完成说话,以便我可以调用我的语音识别器功能.

Answer 1

public class TTSActivity extends Activity implements OnInitListener, OnUtteranceCompletedListener, ... {
private TextToSpeech mTts;
...........
private void speak(String text) {
   if(text != null) {
      HashMap<String, String> myHashAlarm = new HashMap<String, String>();
      myHashAlarm.put(TextToSpeech.Engine.KEY_PARAM_STREAM, String.valueOf(AudioManager.STREAM_ALARM));
      myHashAlarm.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "SOME MESSAGE");
      mTts.speak(text, TextToSpeech.QUEUE_FLUSH, myHashAlarm);
   }
}
// Fired after TTS initialization
public void onInit(int status) {
    if(status == TextToSpeech.SUCCESS) {
        mTts.setOnUtteranceCompletedListener(this);
    }
}
// It's callback
public void onUtteranceCompleted(String utteranceId) {
   Log.i(TAG, utteranceId); //utteranceId == "SOME MESSAGE"
   }
...........
}

阅读 一个很好的教程

Answer 2

自API级别15以来,不推荐使用setOnUtteranceCompletedListener.而是使用setOnUtteranceProgressListener.

我找到了一个代码片段(这里),让我很容易知道文本到语音的完成时间:

@Override
public void onInit(int status) {
    if (status == TextToSpeech.SUCCESS) {
        myTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
            @Override
            public void onDone(String utteranceId) {
                // Log.d("MainActivity", "TTS finished");
            }

            @Override
            public void onError(String utteranceId) {
            }

            @Override
            public void onStart(String utteranceId) {
            }
        });
    } else {
        Log.e("MainActivity", "Initilization Failed!");
    }
}

http://www.codota.com/android/scenarios/52fcbd34da0ae25e0f855408/android.speech.tts.TextToSpeech?tag=dragonfly

Answer 3

要知道，当TTS完成后，你必须调用setOnUtteranceProgressListener其中有3种回调方法onStart，onDone并onError 随后包括话语ID给speak方法

代码片段

textToSpeech=new TextToSpeech(this, new TextToSpeech.OnInitListener() {
    @Override
    public void onInit(int status) {
        if (status==TextToSpeech.SUCCESS){
            int result=textToSpeech.setLanguage(Locale.ENGLISH);

            if (result==TextToSpeech.LANG_MISSING_DATA||result==TextToSpeech.LANG_NOT_SUPPORTED){
                Log.i("TextToSpeech","Language Not Supported");
            }

            textToSpeech.setOnUtteranceProgressListener(new UtteranceProgressListener() {
                @Override
                public void onStart(String utteranceId) {
                    Log.i("TextToSpeech","On Start");
                }

                @Override
                public void onDone(String utteranceId) {
                    Log.i("TextToSpeech","On Done");
                }

                @Override
                public void onError(String utteranceId) {
                    Log.i("TextToSpeech","On Error");
                }
            });

        }else {
            Log.i("TextToSpeech","Initialization Failed");
        }
    }
});


if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        textToSpeech.speak(text,TextToSpeech.QUEUE_FLUSH,null,TextToSpeech.ACTION_TTS_QUEUE_PROCESSING_COMPLETED);
    }

Answer 4

我注意到有人在使用TextToSpeech时遇到问题，请问您的解决方案

如何知道TTS完成时间？不使用setOnUtteranceCompletedListener

public void isTTSSpeaking(){

    final Handler h =new Handler();

    Runnable r = new Runnable() {

        public void run() {

            if (!tts.isSpeaking()) {
                onTTSSpeechFinished();
            }

            h.postDelayed(this, 1000);
        }
    };

    h.postDelayed(r, 1000);
}