Using Java reflection to change the Context of the AudioManager to ApplicationContext, so VideoView can be GCed properly.

VideoViewLeakFix.java

@Override
protected void onDestroy() {
    super.onDestroy();
        //Here fix a leak when VideoView holds context
        // because AudioManager didn't release audio focus properly.
    if (mVideoView != null) {
        AudioManager am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
        try {
            Field f = am.getClass().getDeclaredField("mContext");
            f.setAccessible(true);
            f.set(am, getApplicationContext());
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}