import android.app.Activity;
import android.speech.tts.*;

sbool androidSay_keepEngine = false;

// locale = language, e.g. Locale.GERMAN
static void androidSay(final S text, final Locale locale) {
  if (androidSay_keepEngine) {
    androidSay_keepEngine(text, locale);
    ret;
  }
  
  final new Flag flag;
  
  final TextToSpeech[] tts = new TextToSpeech[1];
  tts[0] = new TextToSpeech(androidContext(), new TextToSpeech.OnInitListener() {
    public void onInit(int status) {
      try {
        if (status != TextToSpeech.SUCCESS)
          fail("Speech engine initialization failed");
  
        int result = tts[0].setLanguage(locale);
        if (result == TextToSpeech.LANG_MISSING_DATA
          || result == TextToSpeech.LANG_NOT_SUPPORTED)
          fail("Language is not supported");
  
        result = tts[0].setOnUtteranceProgressListener(new UtteranceProgressListener() {
          public void onDone(String utteranceId) {
            print("TTS done");
            tts[0].shutdown();
            flag.raise();
          }
  
          public void onError(String utteranceId) {
            print("TTS error");
            tts[0].shutdown();
            flag.raise();
          }
  
          public void onStart(String utteranceId) {
          }
        });
        
        if (result != TextToSpeech.SUCCESS)
          print("Could not set listener");
            
        print(text);
        new HashMap params;
        params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, randomID(8));
        tts[0].speak(text, TextToSpeech.QUEUE_FLUSH, params);
      
      } catch (Throwable e) { e.printStackTrace(); flag.raise(); }
    }
  });
    
  flag.waitUntilUp();
}

Began life as a copy of #1001301