android mediaplayer get progress info

Hi,

I am working on a media player for android.
I know that a thread should constantly run in order to take the current position of the audio.

String file = audioFile.getAbsolutePath();
 
 mp.reset(); 
 mp.setDataSource(file); 
 mp.prepare();
 
 if (last_pos > 0) {
	 mp.seekTo(last_pos);
 }

 // the media could be just prepared.
 if (media.isAutoPlay()) {
	 mp.start();
 }
 
 mp.setOnPreparedListener(new OnPreparedListener() {
	@Override
	public void onPrepared(final MediaPlayer mp) {
		mHandler.post(new Runnable() {
			@Override
			public void run() {
				int position;
				int duration = mp.getDuration();
				
				do {
					try {
						info.setText(app.getInfo());
						position = mp.getCurrentPosition();
						
						Thread.sleep(1000);
					} catch (Exception ex) { 
						break; 
					}
				} while (mp.isPlaying() && position <= duration); 
			}
		});
	}
});

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any ideas?