Java – badtokenexception: cannot add window

• Java

I have a problem. When the screen times out, I receive a badtokenexception, and then the user returns to my application I have a button to open a ContextMenu click

It works normally, but when the user times out the screen and returns to the application, a badtokenexception is thrown

07-01 14:46:42.763: WARN/WindowManager(1105): Attempted to add window with token that is a sub-window: android.os.BinderProxy@44af17c8.  Aborting.
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.View.showContextMenu(View.java:2444)
    07-01 14:46:42.771: WARN/System.err(1725):     at com.??.??.ui.cards.ViewActivity$3.onClick(ViewActivity.java:353)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.View.performClick(View.java:2408)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.view.View$PerformClick.run(View.java:8816)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.os.Handler.handleCallback(Handler.java:587)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.os.Handler.dispatchMessage(Handler.java:92)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.os.Looper.loop(Looper.java:123)
    07-01 14:46:42.771: WARN/System.err(1725):     at android.app.ActivityThread.main(ActivityThread.java:4627)
    07-01 14:46:42.771: WARN/System.err(1725):     at java.lang.reflect.Method.invokeNative(Native Method)
    07-01 14:46:42.771: WARN/System.err(1725):     at java.lang.reflect.Method.invoke(Method.java:521)
    07-01 14:46:42.771: WARN/System.err(1725):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
    07-01 14:46:42.771: WARN/System.err(1725):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
    07-01 14:46:42.771: WARN/System.err(1725):     at dalvik.system.NativeStart.main(Native Method)
    07-01 14:46:43.005: WARN/System.err(1725): android.view.WindowManager$BadTokenException: Unable to add window -- token android.view.ViewRoot$W@44757528 is not valid; is your activity running?
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewRoot.setView(ViewRoot.java:505)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.app.Dialog.show(Dialog.java:241)
    07-01 14:46:43.005: WARN/System.err(1725):     at com.android.internal.view.menu.MenuDialogHelper.show(MenuDialogHelper.java:86)
    07-01 14:46:43.005: WARN/System.err(1725):     at com.android.internal.view.menu.ContextMenuBuilder.show(ContextMenuBuilder.java:88)
    07-01 14:46:43.005: WARN/System.err(1725):     at com.android.internal.policy.impl.PhoneWindow$DecorView.showContextMenuForChild(PhoneWindow.java:1860)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)
    07-01 14:46:43.005: WARN/System.err(1725):     at android.view.ViewGroup.showContextMenuForChild(ViewGroup.java:459)

If I catch an exception, in this case, the button will never open the context menu, but the other controls on the page continue to work

If I minimize the application using the home screen and then return, the application crashes and displays the following trace:

07-01 15:10:50.439: ERROR/AndroidRuntime(1931): FATAL EXCEPTION: main
07-01 15:10:50.439: ERROR/AndroidRuntime(1931): java.lang.NullPointerException
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.view.WindowManagerImpl.removeViewLocked(WindowManagerImpl.java:239)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.view.WindowManagerImpl.closeAll(WindowManagerImpl.java:293)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3687)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.app.ActivityThread.access$2900(ActivityThread.java:125)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.os.Looper.loop(Looper.java:123)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at android.app.ActivityThread.main(ActivityThread.java:4627)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at java.lang.reflect.Method.invokeNative(Native Method)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at java.lang.reflect.Method.invoke(Method.java:521)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-01 15:10:50.439: ERROR/AndroidRuntime(1931):     at dalvik.system.NativeStart.main(Native Method)

Here is how I add ContextMenu:

b.setOnClickListener( new OnClickListener() {
            @Override
            public void onClick( View view ) {
                if (contextMenuOpen) return;// popup options
                contextMenuOpen = view.showContextMenu();

            }

Instead of using the button to call registerForContextMenu, I call the home view itself Is this incorrect?

Solution

You are inheriting a reference to a context that has been destroyed (by creating a dialog box or toast or other dependencies) (usually because you are using oncreatedialog, or you pass an activity to some other process). When an activity is destroyed, it will not be destroyed)

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