@Override
    public void setPadding(int left, int top, int right, int bottom) {

        left = Math.max(mShadowRadius, left);
        top = Math.max(mShadowRadius, top);
        right = Math.max(mShadowRadius, right);
        bottom = Math.max(mShadowRadius, bottom);

        super.setPadding(left, top, right, bottom);
    }
Update the background color of the circle image view.

@param colorRes Id of a color resource.
caprice/ui/src/main/java/net/qiujuer/genius/ui/widget/FloatActionButton.java