private Prompt creatDefaultStopPrompt() {
   if (this._speechKit != null) {
     return Prompt.vibration(100);
   } else {
     Log.e(
         PLUGIN_NAME,
         "Cannot create Stop Prompt: SpeechKit not initialized, returning default prompt [NONE]...");
   }
   return null;
 }
  public void initializeResources() {
    if (_speechKit != null) {
      return;
    }

    _speechKit =
        SpeechKit.initialize(
            _context,
            Credentials.getSpeechKitAppId(),
            Credentials.getSpeechKitServer(),
            Credentials.getSpeechKitPort(), // the port number, e.g. 443,
            Credentials.getSpeechKitSsl(), // true if SSL should be used,
            Credentials
                .getSpeechKitCertSummary(), // the summary String (must match the Common Name (CN)
            // of the used certificate-data; as provided by Nuance)
            Credentials.getSpeechKitCertData(), // the certificate data,
            Credentials.getSpeechKitAppKey());

    _speechKit.connect();
    int beepResId =
        _context
            .getResources()
            .getIdentifier("rawbeep", "raw", _context.getApplicationInfo().packageName);

    // TODO: Keep an eye out for audio prompts not-working on the Android 2 or other 2.2 devices.
    this._defaultStartPrompt = _speechKit.defineAudioPrompt(beepResId);
    this._defaultStopPrompt = Prompt.vibration(100);

    _speechKit.setDefaultRecognizerPrompts(
        this._defaultStartPrompt, this._defaultStopPrompt, null, null);

    // Create Vocalizer listener
    Vocalizer.Listener vocalizerListener =
        new Vocalizer.Listener() {
          @Override
          public void onSpeakingBegin(Vocalizer vocalizer, String text, Object context) {
            Log.d(PLUGIN_TTS_NAME, String.format("start speaking: '%s'", text));

            if (context instanceof Vocalizer.Listener) {
              ((Vocalizer.Listener) context).onSpeakingBegin(vocalizer, text, null);
            }
          }

          @Override
          public void onSpeakingDone(
              Vocalizer vocalizer, String text, SpeechError error, Object context) {
            // Use the context to determine if this was the final TTS phrase
            Log.d(PLUGIN_TTS_NAME, String.format("speaking done: '%s'", text));

            if (context instanceof Vocalizer.Listener) {
              ((Vocalizer.Listener) context).onSpeakingDone(vocalizer, text, error, null);
            }
          }
        };

    // Create a single Vocalizer here.
    _vocalizer =
        _speechKit.createVocalizerWithLanguage(_currentLanguage, vocalizerListener, new Handler());
    _recognitionListener = createRecognitionListener();
    _handler = new Handler();
  }