退出Activity时弹出登录框，点击确定finish当前Activity，结果报了这个错，随后查找资料知道退出Activity时弹出登录框，点击确定finish当前Activity，结果报了这个
阅读背景：
Activity has leaked window that was originally added -界面退出时未关闭对话框异常 android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running? -
来源：互联网
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