android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an appli

来源：互联网发布：python quants 编辑：程序博客网时间：2024/04/29 20:37

弹dialog是出现如下错误：

08-25 18:11:01.970: E/AndroidRuntime(24561): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application08-25 18:11:01.970: E/AndroidRuntime(24561): at android.view.ViewRootImpl.setView(ViewRootImpl.java:589)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:326)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.app.Dialog.show(Dialog.java:293)08-25 18:11:01.970: E/AndroidRuntime(24561): at com.ttdevs.easysecuritysmartbar.StartHandler.handleMessage(StartHandler.java:39)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.os.Handler.dispatchMessage(Handler.java:99)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.os.Looper.loop(Looper.java:137)08-25 18:11:01.970: E/AndroidRuntime(24561): at android.app.ActivityThread.main(ActivityThread.java:4866)08-25 18:11:01.970: E/AndroidRuntime(24561): at java.lang.reflect.Method.invokeNative(Native Method)08-25 18:11:01.970: E/AndroidRuntime(24561): at java.lang.reflect.Method.invoke(Method.java:511)08-25 18:11:01.970: E/AndroidRuntime(24561): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)08-25 18:11:01.970: E/AndroidRuntime(24561): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)08-25 18:11:01.970: E/AndroidRuntime(24561): at dalvik.system.NativeStart.main(Native Method)

AlertDialog dialog = new AlertDialog.Builder(context).setTitle(title).setCancelable(false).setPositiveButton("确定", listener).create();

其中context是通过getApplicationContext()获取的，将其换成Activity.this，问题解决