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);