StickyNavLayout.java

public void fling(int velocityY)
	{
		mScroller.fling(0, getScrollY(), 0, velocityY, 0, 0, 0, mTopViewHeight);
		invalidate();
	}
 
	@Override
	public void scrollTo(int x, int y)
	{
		if (y < 0)
		{
			y = 0;
		}
		if (y > mTopViewHeight)
		{
			y = mTopViewHeight;
		}
		if (y != getScrollY())
		{
			super.scrollTo(x, y);
		}
 
		isTopHidden = getScrollY() == mTopViewHeight;
 
	}
 
	@Override
	public void computeScroll()
	{
		if (mScroller.computeScrollOffset())
		{
			scrollTo(0, mScroller.getCurrY());
			invalidate();
		}
	}