SampleActivity.java

public class SampleActivity extends Activity {

    private AlbumStorageDirFactory mAlbumFactory;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        /* Implementation not shown */

        mAlbumFactory = AlbumStorageDirFactory.newInstance();
        File sampleAlbumDir = getAlbumDir("sample_album");
    }

    private File getAlbumDir(String albumName) {
        return mAlbumStorageDirFactory.getAlbumStorageDir(albumName);
    }
}