大家好,又见面了,我是你们的朋友全栈君。
RelativeLayout relativeLayout= new RelativeLayout(this);
RelativeLayout.LayoutParams rlp=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
rlp.addRule(RelativeLayout.CENTER_IN_PARENT);//addRule参数对应RelativeLayout XML布局的属性
relativeLayout.addView(progressBar,rlp);
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