App crashes on super.onSaveInstanceState

Question

Possible Duplicate:
NullPointerException on onSaveInstanceState with AndroidFragments

when I call super.onSaveInstanceState I get a NullPointerException at android.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1542) on some devices, some others work.

 public void onSaveInstanceState(Bundle savedInstanceState) {
            //...
            super.onSaveInstanceState(savedInstanceState);
    }

With Android 4.1 on a Nexus Tablet its working, on a Samsung with Android 4.0 not. What is the problem here and how can I solve it? Uncommenting onSaveInstanceState works, but I dont think this is correct and it makes my app behave incorrect somewhere else.

Thanks Marvin

edit added stacktrace

FATAL EXCEPTION: main
java.lang.NullPointerException
    at android.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1542)
    at android.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1572)
    at android.app.Activity.onSaveInstanceState(Activity.java:1164)
    at com.MApp.MActivity.onSaveInstanceState(MActivity.java:1111)
    at android.app.Activity.performSaveInstanceState(Activity.java:1113)
    at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1188)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3337)
    at android.app.ActivityThread.access$700(ActivityThread.java:127)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4507)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
    at dalvik.system.NativeStart.main(Native Method)

http://meta.stackexchange.com/questions/19190/should-questions-include-tags-in-their-titles — Marcin Orlowski, Nov 24 '12 at 12:11

score 3 · Answer 1 · edited Nov 27 '12 at 22:16

3

Ok I figured it out now. This is because my fragment had no onSaveInstanceState

I had to fill the bundle with dummy values. It's a bug in android in version 4.0. However, I don't know about other versions.

edited Nov 27 '12 at 22:16

A--C

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answered Nov 27 '12 at 21:48

user1857855

41
3

Its a bug in the compatibility library too. – BrantApps Nov 27 '12 at 23:04

App crashes on super.onSaveInstanceState

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