Android PopUpWindow

• Android PopUpWindow：
  • PopUpWindow和AlertDialog 很像，比较明显的区别就是PopUpWindow可以设置对话框显示的位置，比如在调用相机时在底部弹出的对话框
• 结语：

Android PopUpWindow：

PopUpWindow和AlertDialog 很像，比较明显的区别就是PopUpWindow可以设置对话框显示的位置，比如在调用相机时在底部弹出的对话框

• 直接贴项目中的用法：

    private PopupWindow mPopWindow;
      
    private void showPopupWindow() {
        View convertView = LayoutInflater.from(UserInformationActivity.this).inflate(R.layout.usercenter_takephoto_dialog, null);
        View rootView = LayoutInflater.from(UserInformationActivity.this).inflate(R.layout.usercenter_activity_user_information, null);
        mPopWindow = new PopupWindow(convertView, RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT, true);
        mPopWindow.setContentView(convertView);
        //点击空白处消失
        mPopWindow.setFocusable(true);
        mPopWindow.setBackgroundDrawable(new BitmapDrawable());            
        mPopWindow.setOutsideTouchable(true);
          
        //设置背景透明，就像AlertDialog；1f为不更改，0f为完全消失
        backgroundAlpha(0.4f);
          
        //设置监听事件
        RelativeLayout camera = (RelativeLayout) convertView.findViewById(R.id.rl_takephoto_camera);
        RelativeLayout album = (RelativeLayout) convertView.findViewById(R.id.rl_takephoto_album);
        RelativeLayout cancel = (RelativeLayout) convertView.findViewById(R.id.rl_takephoto_cancel);
        camera.setOnClickListener(clickListener);
        album.setOnClickListener(clickListener);
        cancel.setOnClickListener(clickListener);
          
        //设置布局和显示的位置
        mPopWindow.showAtLocation(rootView, Gravity.BOTTOM, 0, 0);
          
        //设置消失监听，把背景改回去
        mPopWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
            @Override
            public void onDismiss() {
                backgroundAlpha(1f);
            }
        });
    }
      
    //设置背景透明，就像AlertDialog
    private void backgroundAlpha(float bgAlpha) {
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.alpha = bgAlpha;
        getWindow().setAttributes(lp);
    }
  

参考文章：PopUpWindow使用详解(一)——基本使用、android中popupwindow弹出后，屏幕背景变成半透明、Popupwindow 完美demo

结语：

坚持每天进步一点点…