Prevent Fragment recovery in Android

Question

We are using Fragments and we don't need them to be automatically recovered when the Activity is recreated. But Android every time when Activity::onCreate(Bundle savedInstanceState) -> super.onCreate(savedInstanceState) is called, restores Fragments even if we use setRetainInstance(false) for those Fragments.

Moreover, in those Fragments Fragment.performCreateView() is called directly without going through Fragment::onAttach() and so on. Plus, some of the fields are null inside restored Fragment...

Does anybody know how to prevent Android from restoring fragments?

P.S. We know that in case of recreating Activity for config changes it could be done by adding to manifest android:configChanges="orientation|screenSize|screenLayout. But what about recreating activity in case of automatic memory cleaning?

Answer 1

We finished by adding to activity:

@Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(null); } 

It suppresses any saved data on create/recreate cycle of an Activity and avoids fragments auto re-creation.

Answer 2

@goRGon 's answer was very useful for me, but such use cause serious problems when there is some more information you needs to forward to your activity after recreate.

Here is improved version that only removes "fragments", but keep every other parameters.

ID that is removed from bundle is part of android.support.v4.app.FragmentActivity class as FRAGMENTS_TAG field. It may of course change over time, but it's not expected.

@Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(createBundleNoFragmentRestore(savedInstanceState)); }  /**  * Improve bundle to prevent restoring of fragments.  * @param bundle bundle container  * @return improved bundle with removed "fragments parcelable"  */ private static Bundle createBundleNoFragmentRestore(Bundle bundle) {     if (bundle != null) {         bundle.remove("android:support:fragments");     }     return bundle; }