Dialog throwing "Unable to add window — token null is not for an application” with getApplication()

（1）绝大部分情况下，需要做使用Activity中的Context，就可以解决这个问题。

（2）使用如下的方式也可以。

You can continue to use getApplicationContext(), but before use, you should add this flag: dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT), and the error will not show. Add the following permission to your manifest: <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /> Edit: added uses-permission share improve this answer edited May 19 '15 at 8:36 Brabbeldas 826 3 12 27 answered  Dec 25 '14 at 8:09 codezjx 2,258 3 12 33

http://stackoverflow.com/questions/5796611/dialog-throwing-unable-to-add-window-token-null-is-not-for-an-application-wi