Unable to add window -- token null is not valid

Unable to add window -- token null is not valid

分类： Android 2012-04-17 18:06  891人阅读  评论(0)  收藏  举报

如果在 onCreate 中创建该问题，就会报如上异常

【如果activity已经finish掉了。在handlerMessage中调用的时候 也会报异常】

解决办法：在onCreate中执行：

 mHandler.sendEmptyMessageDelayed(SHOWWINDOW, 200);

   private Handler mHandler = new Handler()
     {
         public void handleMessage(Message msg)
         {
             switch (msg.what)
             {
                 case SHOWWINDOW:
                     popupWindow = new PopupWindow(popView,
                         LayoutParams.FILL_PARENT,
                         LayoutParams.FILL_PARENT);
                     popupWindow.showAtLocation(popView,
                         Gravity.BOTTOM,
                         0,
                         0);
                     Log.debug(TAG,
                         "init popupWindow and showing!");
                     break;
                 case ClOSEWINDOW:
                     if (popupWindow != null)
                     {
                         popupWindow.dismiss();
                     }
                     Log.debug(TAG,
                         "close popupWindow and destory!");
                     break;
             }
         }


     };