main.py

class MediaPlayer(object):
    '''
    MediaPlayer object is used to avoid keeping multiple sound files in memory
    '''
    def __init__(self):
        self._media_player = None

    def play_sound(self, soundfile, volume):
        if not soundfile.startswith('/'):
            soundfile = join(getcwd(), 'sounds', soundfile)

        if platform == 'android':
            if self._media_player:
                if self._media_player.isPlaying():
                    self._media_player.stop()
                    self._media_player.release()

            self._media_player = media_player = MP()

            media_player.setDataSource(soundfile)
            media_player.prepare()
            # XXX
            media_player.setVolume(float(volume), float(volume))
            media_player.start()
            return media_player
        else:
            print "XXX play_sound not implemented on %s" % platform

play_sound = MediaPlayer().play_sound