Android中利用LinearLayout动态添加控件

1.动态添加2个垂直排列的Button

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       //setContentView(R.layout.main);     
       final LinearLayout layout2=new LinearLayout(this);
        layout2.setOrientation(LinearLayout.VERTICAL);
        Button btn1=new Button(this);
        setContentView(layout2);
        Button btn2=new Button(this);
        btn1.setText("Button1");
        btn2.setText("Button2");
        layout2.addView(btn1);
        layout2.addView(btn2);


       setContentView(layout2);
}

final LinearLayout layout2=new LinearLayou(this);

定义一个LinearLayout ，参数为context在这儿即为this

layout2.setOrientation(LinearLayout.VERTICAL);

设置layout格式为vertical，竖直排列

2.在Button的click事件中动态添加一个button

OnClickListener listen1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       //setContentView(R.layout.main);     
       final LinearLayout layout2=new LinearLayout(this);
        layout2.setOrientation(LinearLayout.VERTICAL);
        Button btn1=new Button(this);
        setContentView(layout2);
        Button btn2=new Button(this);
        btn1.setText("Button1");
        btn2.setText("Button2");
        layout2.addView(btn1);
        layout2.addView(btn2);       
        listen1 = new OnClickListener() {
            public void onClick(View v) {
                setTitle("点击button1 ");
                Button btn3=new Button(v.getContext());
                layout2.addView(btn3);
                btn3.setText("Button3");


            }
        };
         btn1.setOnClickListener(listen1);
    }