How to know when TTS is finished?

The setOnUtteranceCompletedListener is deprecated since API level 15. Instead, use setOnUtteranceProgressListener.

I found a code snippet (here) that made it really easy for me to know when text to speech is finished:

@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

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"
   }
...........
}

Read A good tutorial

To know when TTS is finished you have to call the setOnUtteranceProgressListener which has 3 call back methods onStart,onDone and onError then include a Utterance Id to the speak method

Code Snippet

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);
    }

I noticed that there are people having problems in the use of TextToSpeech to ask that the solution to you

How to know when TTS is finished? without use 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);
}