Why does popbackstack call onCreateView of the fragment?
android, fragment
Solution
in fact fragment manager doesn't store your hidden fragment it stores only a state
class BackStackState implements Parcelable
see http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.4_r1/android/support/v4/app/FragmentManager.java#FragmentManagerImpl.popBackStackState%28android.os.Handler%2Cjava.lang.String%2Cint%2Cint%29
and when you pop a fragment, fragment manager tries to recreate a previous view to display it.
see moveToState method
Problem
Trying to figure why onCreateView is called when I popbackstack the fragment. Using the following code: ``` fragmentManager.popBackStack("tag1", 1); ft = fragmentManager.beginTransaction(); ft.remove(fragmentManager.findFragmentByTag("tag1")); ft.commit(); ``` Logcat: ``` FATAL EXCEPTION: main java.lang.IndexOutOfBoundsException: Invalid index 79, size is 79 at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255) at java.util.ArrayList.get(ArrayList.java:308) at edu.pacific.pocketrx.FlashCardFrag.onCreateView(FlashCardFrag.java:72) at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) at android.support.v4.app.BackStackRecord.popFromBackStack(BackStackRecord.java:764) at android.support.v4.app.FragmentManagerImpl.popBackStackState(FragmentManager.java:1562) at android.support.v4.app.FragmentManagerImpl$3.run(FragmentManager.java:495) at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467) at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440) at android.os.Handler.handleCallback(Handler.java:730) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5103) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) at dalvik.system.NativeStart.main(Native Method) ``` Code to remove fragment: ``` fragmentManager.popBackStack("tag1", 1); ft = fragmentManager.beginTransaction(); ft.remove(fragmentManager.findFragmentByTag("tag1")); ft.commit(); ```