Fragment MainFragment{fb222c4} is not currently in the FragmentManager on install

[EmmanuelMess]

12-28 14:22:12.244 com.amaze.filemanager.debug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.amaze.filemanager.debug, PID: 17898
    java.lang.IllegalStateException: Fragment MainFragment{fb222c4} is not currently in the FragmentManager
        at android.support.v4.app.FragmentManagerImpl.putFragment(FragmentManager.java:923)
        at com.amaze.filemanager.fragments.TabFragment.onSaveInstanceState(TabFragment.java:269)
        at android.support.v4.app.Fragment.performSaveInstanceState(Fragment.java:2626)
        at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:2910)
        at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:2971)
        at android.support.v4.app.FragmentController.saveAllState(FragmentController.java:134)
        at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:591)
        at android.support.v7.app.AppCompatActivity.onSaveInstanceState(AppCompatActivity.java:510)
        at com.amaze.filemanager.activities.MainActivity.onSaveInstanceState(MainActivity.java:1090)
        at android.app.Activity.performSaveInstanceState(Activity.java:1302)
        at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1312)
        at android.app.ActivityThread.callCallActivityOnSaveInstanceState(ActivityThread.java:4109)
        at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3511)
        at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3571)
        at android.app.ActivityThread.-wrap20(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1378)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5443)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

[devmike01]

Hi @EmmanuelMess . I investigated the bug and fortunately I was able to find what went wrong. I fixed it by checking if fragmentManager.executePendingTransactions() is true before putting the fragment in the fragment manager... Look for for (Fragment fragment : fragments){...} in your onSaveInstanceState method inside TabFragment. Wrap the statements inside it with if (fragmentManager.executePendingTransactions()){...}. It should now look like this...

if (fragmentManager.executePendingTransactions()) {
    fragmentManager.putFragment(outState, "tab" + i, fragment);
    i++;
}

Hope it help.

[VishalNehra]

Exception

• User Action: UI Error
• Request: Application crash
• Version: 3.5.2
• OS: Linux Nokia/TA-1053_00WW/ND1:9/PKQ1.181105.001/00WW_6_19B:user/release-keys 9 - 28
• Device: ND1
• Model: TA-1053
• Product: TA-1053_00WW

Crash log

java.lang.IllegalStateException: Fragment MainFragment{bf23580 (fe765438-4b89-4b46-a91b-eb96bf0aad7e)} is not currently in the FragmentManager
at androidx.fragment.app.FragmentManagerImpl.putFragment(FragmentManagerImpl.java:350)
at com.amaze.filemanager.ui.fragments.TabFragment.onSaveInstanceState(TabFragment.java:226)
at androidx.fragment.app.Fragment.performSaveInstanceState(Fragment.java:2766)
at androidx.fragment.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManagerImpl.java:2289)
at androidx.fragment.app.FragmentManagerImpl.saveAllState(FragmentManagerImpl.java:2348)
at androidx.fragment.app.FragmentController.saveAllState(FragmentController.java:151)
at androidx.fragment.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:513)
at androidx.appcompat.app.AppCompatActivity.onSaveInstanceState(AppCompatActivity.java:533)
at com.amaze.filemanager.ui.activities.MainActivity.onSaveInstanceState(MainActivity.java:1150)
at android.app.Activity.performSaveInstanceState(Activity.java:1549)
at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1444)
at android.app.ActivityThread.callActivityOnSaveInstanceState(ActivityThread.java:4836)
at android.app.ActivityThread.callActivityOnStop(ActivityThread.java:4184)
at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4148)
at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4223)
at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1823)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:198)
at android.app.ActivityThread.main(ActivityThread.java:6729)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

---

[VishalNehra]

Keeping this issue open and moving to 3.7 as the fix was just a band-aid. Ideally we should not be saving the whole fragment to instance state, and use viewmodel for TabFragment.
This can easily cause OutOfMemoryException as we experienced in past with MainFragment.