| public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 生成一个LinearLayout，作为布局容器来动态添加3个Button
final LinearLayout layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);
setContentView(layout);
// 生成3个Button
final Button btn1 = new Button(this);
btn1.setText("1");
btn1.setText("Button1");
final Button btn2 = new Button(this);
btn2.setText("2");
btn2.setText("Button2");
final Button btn3 = new Button(this);
btn3.setText("3");
btn3.setText("Button3");
// 动态把三个Button添加到
layout.addView(btn1);
layout.addView(btn2);
layout.addView(btn3);
// 点击按钮时，先把原来在布局容器layout上的删掉，再添加上局容器layout，这样本次添加的控件就会排序到最后，以理解动态添加控件的思路
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
layout.removeView(btn1);
layout.addView(btn1);
}
});
// 同btn1一样道理
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
layout.removeView(btn2);
layout.addView(btn2);
}
});
// 同btn1一样道理
btn3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
layout.removeView(btn3);
layout.addView(btn3);
}
});
setContentView(layout);
}
}
| 
