public boolean isViewUnder(View view, int x, int y) {
        if (view == null) {
            return false;
        }
        return x >= view.getLeft() &&
                x < view.getRight() &&
                y >= view.getTop() &&
                y < view.getBottom();
    }
Determine if the supplied view is under the given point in the
parent view's coordinate system.

@param view Child view of the parent to hit test
@param x X position to test in the parent's coordinate system
@param y Y position to test in the parent's coordinate system
@return true if the supplied view is under the given point, false otherwise
app/src/main/java/home/smart/fly/animations/widget/slidepanel/ViewDragHelper.java