can't release memory automatically

Hi, I found the problem, I think you should override the onDetachedFromWindow() method, because when current SliderLayout instance detach from the window, you should stop the Timer and TimerTask and removeCallbacksAndMessages, or the Context instance of the relevant activity will can't be release, and this will lead to the memory leaks. When I add the code below to the SliderLayout.java, the leaks problem is sovled.
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
CustomLog.debug(LOG_TAG, "onDetachedFromWindow() ***");
if(mCycleTimer != null) mCycleTimer.cancel();
if(mCycleTask != null) mCycleTask.cancel();
if(mResumingTask != null) mResumingTask.cancel();
if(mResumingTimer != null) mResumingTimer.cancel();
mh.removeCallbacksAndMessages(null);
}
But actually, I can't surely if this is what the problem is?