实现弹出窗口后Activity背景变暗

 1     /**   
 2         * 创建PopupWindow   
 3         */     
 4         protected void initPopuptWindow() {     
 5          WindowManager windowManager = getActivity().getWindowManager();  
 6          Display display =  windowManager.getDefaultDisplay();  
 7          popupWindow = new PopupWindow(popupWindow_view, display.getWidth(),display.getHeight(), true);    
 8           // 设置动画效果     
 9          popupWindow.setAnimationStyle(R.style.Animation_ZoomLight);  
10           //修改窗口的透明度，从而使Activity背景变暗
11          WindowManager.LayoutParams params=getActivity().getWindow().getAttributes(); 
12          params.alpha=0.7f;      
13          getActivity().getWindow().setAttributes(params);  
14           //点击其他地方消失     
15          popupWindow_view.setOnTouchListener(new OnTouchListener() {     
16           @Override     
17           public boolean onTouch(View v, MotionEvent event) {     
18           // TODO Auto-generated method stub     
19           closePopupWindow();  
20           return false;     
21           }     
22           });     
23         }  
24        /***   
25         * 获取PopupWindow实例   
26         */     
27        private void getPopupWindow() {     
28              
29         if (null != popupWindow) {     
30          closePopupWindow();  
31         return;     
32         } else {     
33         initPopuptWindow();     
34         }     
35         }      
36        /** 
37         * 关闭窗口 
38         */  
39        private void closePopupWindow()  
40        {  
41          if (popupWindow != null && popupWindow.isShowing()) {     
42           popupWindow.dismiss();     
43           popupWindow = null;     
44           WindowManager.LayoutParams params=getActivity().getWindow().getAttributes();  
45           params.alpha=1f;  
46           getActivity().getWindow().setAttributes(params);  
47           }     
48        }  

 

转载于:https://www.cnblogs.com/jasonxcj/p/4956489.html