RelativeLayout mLayout = new RelativeLayout();
　　　　//设置RelativeLayout的子控件属性对象，并设置其尺寸样式。每个GroupView中都有一个LayoutPrams,都是用来给子控件设置发生的。


　　　　RelativeLayout.LayoutPrams params = new RelativeLayout.LayoutPrams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
　　　　//增加 子控件
　　　　ImageView iv = new ImageView(getActivity());
　　　　iv.setImageResource(R.drawable.tab_icon_conversation_normal);
　　　　//设置子控件在RealtiveLayout中的位置属性。
　　　　params.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE); //给iv 增加属性
　　　　 //将iv，增加到mLayout中
　　　　mLayout .addView(iv, params); 

AbsoluteLayout abslayout=new AbsoluteLayout (this);
setContentView(abslayout);
Button btn1 = new Button(this);
btn1.setText(”this is a button”);
btn1.setId(1);
AbsoluteLayout.LayoutParams lp1 =
new AbsoluteLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT,
0,100);
abslayout.addView(btn1, lp1);

RelativeLayout relativeLayout = new RelativeLayout(this);
setContentView(relativeLayout);
AbsoluteLayout abslayout=new AbsoluteLayout (this);
RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp1.addRule(RelativeLayout.ALIGN_PARENT_TOP);
lp1.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
relativeLayout.addView(abslayout ,lp1);

LinearLayout ll = new LinearLayout(this);
EditText et = new EditText();
ll.addView(et);
//动态添加布局的方法1. LinearLayout ll = (LinearLayout)this.getLayoutInflater().inflate(R.layout.main1,null); setContentView(ll); LinearLayout ll2 = (LinearLayout)this.getLayoutInflater().inflate(R.layout.main2,ll); //这样 main2 作为 main1的子布局 加到了 main1的 根节点下
//动态添加布局的方法2 addView. LinearLayout ll = (LinearLayout)this.getLayoutInflater().inflate(R.layout.main1,null); setContentView(ll); LinearLayout ll2 = (LinearLayout)this.getLayoutInflater().inflate(R.layout.main2,null); ll.addView(ll2);