Essential Books

Speech to Text without Dialog

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The following code can be used to trigger speech-to-text translation without showing a dialog: 

public void startListeningWithoutDialog() {
    // Intent to listen to user vocal input and return the result to the same activity.
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

    // Use a language model based on free-form speech recognition.
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
            RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
    intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 5);
    intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
            appContext.getPackageName());

    // Add custom listeners.
    CustomRecognitionListener listener = new CustomRecognitionListener();
    SpeechRecognizer sr = SpeechRecognizer.createSpeechRecognizer(appContext);
    sr.setRecognitionListener(listener);
    sr.startListening(intent);
}

The custom listener class CustomRecognitionListener used in the code above is implemented as follows: 

class CustomRecognitionListener implements RecognitionListener {
    private static final String TAG = "RecognitionListener";

    public void onReadyForSpeech(Bundle params) {
        Log.d(TAG, "onReadyForSpeech");
    }

    public void onBeginningOfSpeech() {
        Log.d(TAG, "onBeginningOfSpeech");
    }

    public void onRmsChanged(float rmsdB) {
        Log.d(TAG, "onRmsChanged");
    }

    public void onBufferReceived(byte[] buffer) {
        Log.d(TAG, "onBufferReceived");
    }

    public void onEndOfSpeech() {
        Log.d(TAG, "onEndofSpeech");
    }

    public void onError(int error) {
        Log.e(TAG, "error " + error);

        conversionCallaback.onErrorOccured(TranslatorUtil.getErrorText(error));
    }

    public void onResults(Bundle results) {
        ArrayList<String> result = data
                .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
        txtSpeechInput.setText(result.get(0));
    }

    public void onPartialResults(Bundle partialResults) {
        Log.d(TAG, "onPartialResults");
    }

    public void onEvent(int eventType, Bundle params) {
        Log.d(TAG, "onEvent " + eventType);
    }
}
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Speech to Text Conversion:
* Speech to Text Conversion
* Speech to Text With Default Google Prompt Dialog
* Speech to Text without Dialog
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