MediaPlayer.setDataSource() and prepare() not working - android

I'm having a crack at using the MediaPlayer object and not having much success. If I add a sound asset to my raw folder and call it using the int value within R, it works fine. But I want to be able to pull things off of url.

According to all of the documentation I've read setDataSource() should accept a string param with a url to a file.

I keep getting an IO exception on the prepare() statement. I've even tried copying the file locally and still no dice.

Anyone have any ideas?

Me开发者_高级运维diaPlayer mp = new MediaPlayer();
try {
        mp.setDataSource("http://www.urltofile.com/file.mp3");
        mp.prepare();
        mp.start();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

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Try MediaPlayer.create(), you also may want to start only after player is actually ready, for example:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    MediaPlayer player = MediaPlayer.create(this, Uri.parse("http://www.urltofile.com/file.mp3"));
    player.setOnPreparedListener(new OnPreparedListener() { 
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.start();
        }
    });
}

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For streams, you should call prepareAsync(), which returns immediately, rather than blocking until enough data has been buffered.