android自定义添加控件

public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 //确定界面的布局
 AbsoluteLayout abslayout=new AbsoluteLayout (this);
 setContentView(abslayout);
 //创建一个button按钮
 Button btn1 = new Button(this);
 btn1.setText(”this is a button”);
 btn1.setId(1);
 //确定这个控件的大小和位置
 AbsoluteLayout.LayoutParams lp1 =
 new AbsoluteLayout.LayoutParams(
 ViewGroup.LayoutParams.WRAP_CONTENT,
 ViewGroup.LayoutParams.WRAP_CONTENT,
 0,100);
 abslayout.addView(btn1, lp1 );

}