Unloading Sounds

The app works, but to be a good citizen you should clean up your SoundPool by calling SoundPool.release() when you are done with it.

Listing 21.16  Releasing your SoundPool (BeatBox.java) 

public class BeatBox {
    ...
    public void play(Sound sound) {
        ...
    }

    public void release() {
        mSoundPool.release();
    }
    ...
}

Then, add a matching BeatBox.release() method in BeatBoxFragment.

Listing 21.17  Releasing your BeatBox (BeatBoxFragment.java) 

public class BeatBoxFragment extends Fragment {
    ...
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ...
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mBeatBox.release();
    }
    ...
}

Run your app again to make sure it works correctly with your new release() method. If you play a long sound and rotate the screen or hit the Back button, you should now hear the sound stop.

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