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I am using a ViewPager with fragments .I get a null pointer exception when the screen orientation is changed to landscape.A different layout is used for landscape

The exception is :

android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:871)

Any help would be really appreciated

Stack trace:-

09-18 20:31:02.770: E/AndroidRuntime(32205): FATAL EXCEPTION: main
09-18 20:31:02.770: E/AndroidRuntime(32205): java.lang.RuntimeException: Unable to start activity ComponentInfo{inc.mine.Customtracker/inc.mine.Customtracker.TabsActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{inc.mine.Customtracker/inc.mine.Customtracker.ChartActivity}: java.lang.NullPointerException
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2202)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2237)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3806)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.access$700(ActivityThread.java:139)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1266)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.os.Looper.loop(Looper.java:156)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.main(ActivityThread.java:5005)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at java.lang.reflect.Method.invokeNative(Native Method)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at java.lang.reflect.Method.invoke(Method.java:511)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at dalvik.system.NativeStart.main(Native Method)
09-18 20:31:02.770: E/AndroidRuntime(32205): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{inc.mine.Customtracker/inc.mine.Customtracker.ChartActivity}: java.lang.NullPointerException
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2202)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.startActivityNow(ActivityThread.java:1992)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:706)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.widget.TabHost.setCurrentTab(TabHost.java:350)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.widget.TabHost.addTab(TabHost.java:240)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at inc.mine.Customtracker.TabsActivity.addTab(TabsActivity.java:59)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at inc.mine.Customtracker.TabsActivity.setTabs(TabsActivity.java:36)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at inc.mine.Customtracker.TabsActivity.onCreate(TabsActivity.java:30)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.Activity.performCreate(Activity.java:4543)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2158)
09-18 20:31:02.770: E/AndroidRuntime(32205):    ... 12 more
09-18 20:31:02.770: E/AndroidRuntime(32205): Caused by: java.lang.NullPointerException
09-18 20:31:02.770: E/AndroidRuntime(32205):    at inc.mine.Customtracker.ChartFragment.onCreateView(ChartFragment.java:64)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:871)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1065)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1844)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:519)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1195)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.Activity.performStart(Activity.java:4553)
09-18 20:31:02.770: E/AndroidRuntime(32205):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
09-18 20:31:02.770: E/AndroidRuntime(32205):    ... 24 more
Mike T
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Krishnanunni Jeevan
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  • Could You provide more logcat output? probably similar to http://code.google.com/p/android/issues/detail?id=19917 . – sandrstar Sep 18 '12 at 10:40
  • can you please post: ChartFragment.java line 64 – Mike T Sep 18 '12 at 10:50
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    Impossible to guess without code, but this is most likely due to wrong initialization. When you change orientation, Activity is restarted. You should save the activity state and restore it. – m0skit0 Sep 18 '12 at 10:53
  • @sandrstar Agreed. Probably that- or [this](http://stackoverflow.com/questions/10456077/nullpointerexception-in-fragmentmanager/11448991#11448991) - The difference being the latter occurs intermittently rather than on every rotation change... – BrantApps Sep 18 '12 at 11:08
  • @m0skit0 can you please put your comment as answer – Krishnanunni Jeevan Sep 19 '12 at 00:47

1 Answers1

0

This is most likely due to wrong initialization. When you change orientation, Activity is restarted. You should save the activity state and restore it.

m0skit0
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