App crashes onPause

Question

I've made a soundboard application. I'm using SherlockActionBar for fragments. When I swipe to another fragment and than press the home button my application crashes.

I'm not overriding onSaveInstanceState, onPause, onDestroy, etc.

The problem still exists even if I delete all my fragment content

My Log:

09-16 19:33:57.030: E/AndroidRuntime(32080): FATAL EXCEPTION: main
09-16 19:33:57.030: E/AndroidRuntime(32080): java.lang.RuntimeException: Unable to pause activity {com.mega.sb/com.mega.sb.MainActivity}: java.lang.NullPointerException
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2879)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2835)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2813)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.access$800(ActivityThread.java:140)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.os.Looper.loop(Looper.java:137)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.main(ActivityThread.java:4898)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at java.lang.reflect.Method.invokeNative(Native Method)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at java.lang.reflect.Method.invoke(Method.java:511)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at dalvik.system.NativeStart.main(Native Method)
09-16 19:33:57.030: E/AndroidRuntime(32080): Caused by: java.lang.NullPointerException
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at com.actionbarsherlock.app.SherlockFragmentActivity.onSaveInstanceState(SherlockFragmentActivity.java:126)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.Activity.performSaveInstanceState(Activity.java:1181)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1219)
09-16 19:33:57.030: E/AndroidRuntime(32080):    at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2861)
09-16 19:33:57.030: E/AndroidRuntime(32080):    ... 12 more

Thanks in advance!

post your code here..and specify in what line you are getting the error...(null pointer in your case) — khubaib, Sep 17 '13 at 10:06
Check this answer: http://stackoverflow.com/questions/12217681/nullpointerexception-on-onsaveinstancestate-with-androidfragments — Josu Garcia de Albizu, Sep 17 '13 at 10:13
@Henkie You have two versions of the support jar. Update them both to the latest version. — laalto, Sep 17 '13 at 11:31

score 2 · Accepted Answer · answered Sep 17 '13 at 12:00

2

changing the FragmentPagerAdapter to FragmentStatePagerAdapter should do the trick!

answered Sep 17 '13 at 12:00

Wannabe

727
1
6
21

score 0 · Answer 2 · answered Sep 17 '13 at 10:13

Try this workaround :

@Override
public void onSaveInstanceState(Bundle outState) 
{
    outState.putString("your_key", "your_value");           
    super.onSaveInstanceState(outState);
}

Its a bug of sorts (or maybe not). But try the above For all fragments, override the onSaveInstanceState() as given above

One more thing your libs also can contradict so you have to use same libs for android-support-v4.jar for both (your project and for SherlockActionBar Library)

App crashes onPause

2 Answers2