Runnable runnable = new Runnable() {
	public void run() {
		try {
			videoView.setVideoURI(Uri.fromFile(file));
			videoView.start();
		} catch (RuntimeException e) {
			Log.e("Internal File Video", "URI not found");
		}
	}
};	
videoView.post(runnable);


...


videoView.stopPlayback();