Android setLayoutParams - ythy/blog GitHub Wiki

举例：

RelativeLayout.LayoutParams lps = new RelativeLayout.LayoutParams(llmain.getMeasuredWidth()
                , RelativeLayout.LayoutParams.WRAP_CONTENT);
lps.addRule(RelativeLayout.BELOW, R.id.ll_main);
lps.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
this.handview.setLayoutParams(lps);

• RelativeLayout.LayoutParams 的类型 RelativeLayout 是handview 父容器的类型
• setLayoutParams执行后 , handview原有的位置属性值会被覆盖掉， 需要通过addRule来再次设置