[android-developers] Re: java.lang.IllegalStateException: Fragment is not currently in the FragmentManager

Someone please?

On Sunday, June 3, 2012 10:50:33 AM UTC+3, Alexandros wrote:

Hello everyone,

Some time ago, I updated my application to use the support v4 library in order to use the ViewPager control. The initial version of the application used the FragmentPagerAdapter, however, because the application has a lot of pages it seemed wise to use the FragmentStatePagerAdapter, since I was getting OutOfMemory reports. But now, I am getting reports of another error. The error is:  java.lang.IllegalStateException: Fragment <MyFragment> is not currently in the FragmentManager.

I did some searching on the Internet, but nothing solid came up. The problem seems to be happening when the activity is trying to pause and the onSaveInstanceState method is called. After I did some investigation on the support v4 library my self, I noticed that this exception is thrown in the FragmentManager.putFragment() when the member of the fragment mIndex is less than 0, but I cannot figure out when mIndex becomes less than 0 and why this is not handled correctly.

I would like to point out that I do not have an MOR (method of reproduction) for this error.

Here is the call stack:

java.lang.RuntimeException: Unable to pause activity  <my activity with the ViewPager> java.lang.IllegalStateException: Fragment <MyFragment> is not currently in the FragmentManager
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3438)
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3395)
at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3378)
at android.app.ActivityThread.access$2700(ActivityThread.java:129)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2124)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:143)
at android.app.ActivityThread.main(ActivityThread.java:4717)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: Fragment <MyFragment> is not currently in the FragmentManager
at android.support.v4.app.FragmentManagerImpl.putFragment(FragmentManager.java:516)
at android.support.v4.app.FragmentStatePagerAdapter.saveState(FragmentStatePagerAdapter.java:185)
at android.support.v4.view.ViewPager.onSaveInstanceState(ViewPager.java:881)
at android.view.View.dispatchSaveInstanceState(View.java:6098)
at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:1323)
at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:1327)
at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:1327)
at android.view.ViewGroup.dispatchSaveInstanceState(ViewGroup.java:1327)
at android.view.View.saveHierarchyState(View.java:6081)
at com.android.internal.policy.impl.PhoneWindow.saveHierarchyState(PhoneWindow.java:1573)
at android.app.Activity.onSaveInstanceState(Activity.java:1094)
at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:480)
 at <my activity with the ViewPager>.onSaveInstanceState(ContentActivity.java:288)
at android.app.Activity.performSaveInstanceState(Activity.java:1044)
at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1180)
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3420)

Thanks in advanced.

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