Android Example: Playing Audio/Video (http://goo.gl/GaTWcE)

private void invokePlay( Boolean loop )
{
    Boolean playing = ( mp.isLooping() || mp.isPlaying() );
    if ( playing )
    {
        mp.pause();
        mp.setLooping(loop);
        mp.seekTo(0);
        mp.start();
    }
    if ( !playing && state == PREPARED )
    {
        state = PENDING_LOOP;
        onPrepared( mp );
    }
    else if ( !playing )
    {
        state = PENDING_LOOP;
        mp.setLooping(loop);
        mp.start();
    }
}