Android 在已有布局中动态添加控件

//手动添加imageview
RelativeLayout mainLayout = (RelativeLayout)findViewById(R.id.relaGameZhaiGuoZi);
imgApple2 = new ImageView(this);
imgApple2.setImageResource(R.drawable.app);
imgApple2.setId(110);	//注意这点 设置id
imgApple2.setOnClickListener(this);
RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//        lp1.addRule(RelativeLayout.ALIGN_TOP);
//        lp1.setMargins(30, 50, 100, 100);//(int left, int top, int right, int bottom)
lp1.leftMargin=30;
lp1.topMargin = 100;
mainLayout.addView(imgApple2,lp1);