android 中动态创建控件

 

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 );

}

 

一个界面可以布置一个布局，可以多个布局一起设计

 

public  void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

     // 设置界面的布局
    RelativeLayout relativeLayout =  new RelativeLayout( this);
    setContentView(relativeLayout);

     // 添加一个AbsoluteLayout子布局,并给这个布局添加一个button
    AbsoluteLayout abslayout= new AbsoluteLayout ( this);
    abslayout.setId(11);
    Button btn1 =  new Button( this);
    btn1.setText(” this is a abslayout button”);
    btn1.setId(1);
    AbsoluteLayout.LayoutParams lp0 =  new AbsoluteLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
    ViewGroup.LayoutParams.WRAP_CONTENT,100,0);
    abslayout.addView(btn1, lp0 );
     // 将这个子布局添加到主布局中
    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);

     // 再添加一个子布局
    RelativeLayout relativeLayout1 =  new RelativeLayout( this);
    Button btn2 =  new Button( this);
    btn2.setText(” this is a relativeLayout1 button”);
    btn2.setId(2);
    RelativeLayout.LayoutParams lp2 =  new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    lp2.addRule(RelativeLayout.ALIGN_PARENT_TOP);
    lp2.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
    relativeLayout1.addView(btn2 ,lp2);

     // 将这个布局添加到主布局中
    RelativeLayout.LayoutParams lp11 =  new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    lp11.addRule(RelativeLayout.BELOW ,11);
    relativeLayout.addView(relativeLayout1 ,lp11);
}