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IllegalStateException: Can not perform this action after onSaveInstanceState - How to prevent?

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By User


I'm getting user reports from my app in the market, delivering the following exception: 





java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState

at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1109)

at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:399)

at android.app.Activity.onBackPressed(Activity.java:2066)

at android.app.Activity.onKeyUp(Activity.java:2044)

at android.view.KeyEvent.dispatch(KeyEvent.java:2529)

at android.app.Activity.dispatchKeyEvent(Activity.java:2274)

at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1803)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1855)

at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1277)

at android.app.Activity.dispatchKeyEvent(Activity.java:2269)

at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1803)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.widget.TabHost.dispatchKeyEvent(TabHost.java:297)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)

at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1855)

at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1277)

at android.app.Activity.dispatchKeyEvent(Activity.java:2269)

at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1803)

at android.view.ViewRoot.deliverKeyEventPostIme(ViewRoot.java:2880)

at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2853)

at android.view.ViewRoot.handleMessage(ViewRoot.java:2028)

at android.os.Handler.dispatchMessage(Handler.java:99)

at android.os.Looper.loop(Looper.java:132)

at android.app.ActivityThread.main(ActivityThread.java:4028)

at java.lang.reflect.Method.invokeNative(Native Method)

at java.lang.reflect.Method.invoke(Method.java:491)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)

at dalvik.system.NativeStart.main(Native Method)


Apparently it has something to do with a FragmentManager, which I don't use. The stacktrace doesn't show any of my own classes, so I have no idea where this exception occurs and how to prevent it.



For the record: I have a tabhost, and in each tab there is a ActivityGroup switching between Activities.


Source: Tips4all, CCNA FINAL EXAM
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Comments

  1. UserMay 14, 2012 at 9:06 AM

    I found a dirty solution for this kind of problem. If you still want to keep your ActivityGroups for whatever reason (I had time limitation reasons), you just implement

    public void onBackPressed() {}


    in your Activity and do some back code in there. even if there is no such Method on older Devices, this Method gets called by newer ones.

    ReplyDelete
  2. UserMay 14, 2012 at 9:06 AM

    Please check my answer here. Basically I just had to :

    @Override
    protected void onSaveInstanceState(Bundle outState) {
    //No call for super(). Bug on API Level > 11.
    }


    don't make the call to super() on the saveInstanceState method. This was messing things up...

    ReplyDelete

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