Android周笔记(9.8-14)(持续更新)

本笔记记录一周内的小知识点和一些心学习的Demo。

1.PopupWindow：

new 一个activity_pop_window：id为popwindow的Button，id为hello123的TextView

自测2.3以下不能实现：

 protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_pop_window);
         Button btn = (Button) findViewById(R.id.popwindow);
         final View view = LayoutInflater.from(getApplicationContext()).inflate(
                 R.layout.popwindoview, null);
         final PopupWindow pop = new PopupWindow(200, 200);
         view.findViewById(R.id.hello123).setOnClickListener(
                 new OnClickListener() {

                     @Override
                     public void onClick(View v) {
                         pop.dismiss();
                     }
                 });
         pop.setContentView(view);
         btn.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 // pop.showAsDropDown(v);
                 int[] pos = new int[2];
                 v.getLocationOnScreen(pos);
                 pop.showAtLocation(v, Gravity.NO_GRAVITY, pos[0], pos[1]);
             }
         });
     }

2.PopupWindow的消失

方法1：通过点击事件OnclickListrener

方法2：设置popupWindow参数：

pop.setOutsideTouchable(true);
pop.setFocusable(true);