Java – MediaPlayer only plays music files in Debug mode (Android)

I’ve written an Android app (in eclipse) to play music files like this:

MediaPlayer mediaPlayer = new MediaPlayer();
        try
        {

mediaPlayer.setDataSource(fileName);
            mediaPlayer.prepare();
            mediaPlayer.start();
          mediaPlayer.stop();

}
        catch (Exception e)
        {
            Log.d("Exception---", e.getMessage());
        }

When I run it, it

doesn’t play the file (and doesn’t show any exception either), but when I switch to “Debug mode” and track it line by line, it plays the file. I’m really confused. Can you help me figure out what the problem is?

Thank you.

Place a log before “mediaPlayer.setDataSource(fileName)” and check if you get a valid filename in Release mode.