Playing sound FX for a game with android.media.SoundPool..

public static final int SOUND_EXPLOSION = 1;

private SoundPool soundPool;
private HashMap<Integer, Integer> soundPoolMap;

private void initSounds() {
     soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100);
     soundPoolMap = new HashMap<Integer, Integer>();
     soundPoolMap.put(SOUND_EXPLOSION,
 soundPool.load(getContext(), R.raw.explosion, 1));
}

public void playSound(int sound) {
    /* Updated: The next 4 lines calculate the current volume in a scale of 0.0 to 1.0 */
    AudioManager mgr = (AudioManager)getContext().getSystemService(Context.AUDIO_SERVICE);
    float streamVolumeCurrent = mgr.getStreamVolume(AudioManager.STREAM_MUSIC);
    float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    float volume = streamVolumeCurrent / streamVolumeMax;

    /* Play the sound with the correct volume */
    soundPool.play(soundPoolMap.get(sound), volume, volume, 1, 0, 1f);
}

public void explode() {
    playSound(SOUND_EXPLOSION);
}