How to wait for result of speech recognition in android?

Question

I am using recognition listener for speech recognition in android. The basic construct of my class is as follows:

class SpeechInput implements RecognitionListener {

    Intent intent;
    SpeechRecognizer sr;
    boolean stop;

    public void init() {
        sr = SpeechRecognizer.createSpeechRecognizer(context);
        sr.setRecognitionListener(this);
        intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,context.getPackageName());
        intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS,3);
    }

    ...

}

I am stuck in a situation where I want to run android recognition listener in a loop, something over the lines of:

for(int i=0; i<N; i++) {
       // Some processing code
       sr.startListening(intent);
}

Now, I want to wait for the output before it starts listening again. In order to achieve this, I tried to use locking mechanism as follows:

for(int i=0; i<N; i++) {
       // Some processing code
       sr.startListening(intent);
       stop = false; 
       new Task().execute().get();
}

where Task is an asyncTask defined as follows:

private class Task extends AsyncTask<Void,Void,Void> {

        @Override
    protected Void doInBackground(Void... params) {
        try {
            int counter = 0;
            while(!stop) {
                counter++;
            }
        } catch(Exception e) {
        }
        return null;
    }
}

The boolean value 'stop' is updated in the 'onResults' method of RecognitionListener as follows:

public void onResults(Bundle results) {
    ...
    stop = true;
}

The problem is that speech recognition is not working at all. Nothing is happening, it is not even starting. I guess this is because the asyncTask is taking up all the processor time. Can you please guide me towards an architecture where I would be able to achieve this? Thank you.

Answer 1

Restart the listening when you receive a result. No loop needed, no waiting needed.

I'm not an expert on Speech recognition on Android but you are probably blocking the Main thread with the call

new Task().execute().get();

So the speech recognition is probably never started.