1、获取按钮的LayoutParams
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams)button.getLayoutParams();2、在LayoutParams中设置margin
layoutParams.setMargins(100,20,10,5);//4个参数按顺序分别是左上右下3、把这个LayoutParams设置给按钮
button.setLayoutParams(layoutParams); //mView是控件
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