1.红点切换间距
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) iv_red_point.getLayoutParams(); params.leftMargin = leftmargin; iv_red_point.setLayoutParams(params);
2.显示和隐藏按钮
3.getViewTreeObserver()
原文:http://www.cnblogs.com/ganchuanpu/p/5991409.html