Mediaplayer progress update to seekbar not smooth?

Question

I am working on an app with recorder and player. I am using mediaplayer to play the recorded .wav file and meantime I want to update to a seekbar. Everything is working fine But

Answer 1

Here is how i handle the seekbar;

        mediaPlayer.setOnPreparedListener(new OnPreparedListener(){

        @Override
        public void onPrepared(MediaPlayer mp) {
            mediaPlayer.start();
            new SeekBarHandler().execute();
    });

Now i have an Async Task called SeekBarHandler that handles the seekbar like this:

    public class SeekBarHandler extends AsyncTask {

@Override
protected void onPostExecute(Void result) {
    Log.d("##########Seek Bar Handler ################","###################Destroyed##################");
    super.onPostExecute(result);
}

@Override
protected void onProgressUpdate(Void... values) {
    seekBar.setProgress(mediaPlayer.getCurrentPosition());
    super.onProgressUpdate(values);
}

@Override
protected Void doInBackground(Void... arg0) {
    while(mediaPlayer.isPlaying()&&isViewOn==true) {
        try {
            Thread.sleep(200);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    onProgressUpdate();
    }
    return null;
}

    }

Now in my onPause, i terminate the AsyncTask as it doesnt make sense to keep the thread going when the user is not able to see the seekbar

    protected void onPause() {
    isViewOn=false;
    super.onPause();
    }

And on onResume i start the AsyncTaskAgain like this

    protected void onResume() {
    isViewOn=true;
    new SeekBarHandler().execute();
    super.onResume();
    }

As you can see i use a boolean flag isViewOn to check whether the view is on or not to handle the seekbar.