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);

	}

}