Nested fragments survive screen rotation
- by ievgen
I've faced with an issue with Nested Fragments in Android.
When I rotate the screen the Nested Fragments survive somehow.
I've come up with a sample example to illustrate this issue.
public class ParentFragment extends BaseFragment
{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_parent, container);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getChildFragmentManager()
.beginTransaction()
.add(getId(), new ParentFragmentChild(), ParentFragmentChild.class.getName())
.commit();
}
@Override
public void onResume() {
super.onResume();
log.verbose("onResume(), numChildFragments: " + getChildFragmentManager().getFragments().size());
}
}
public class ParentFragmentChild extends BaseFragment
{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_child, null);
}
}
BaseFragment just logs method calls.
This is what I see when I rotate the screen.
When Activity initially appears
ParentFragment? onAttach(): ParentFragment{420d0a98 #0 id=0x7f060064}
ParentFragment? onCreate()
ParentFragment? onViewCreated()
ParentFragmentChild? onAttach(): ParentFragmentChild{420d08d0 #0 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragmentChild? onViewCreated()
ParentFragment? onResume()
ParentFragment? onResume(), numChildFragments: 1
ParentFragmentChild? onResume()
Screen rotation #1
ParentFragmentChild? onPause()
ParentFragment? onPause()
ParentFragment? onSaveInstanceState()
ParentFragmentChild? onSaveInstanceState()
ParentFragmentChild? onStop()
ParentFragment? onStop()
ParentFragmentChild? onDestroyView()
ParentFragment? onDestroyView()
ParentFragmentChild? onDestroy()
ParentFragmentChild? onDetach()
ParentFragment? onDestroy()
ParentFragment? onDetach()
ParentFragment? onAttach(): ParentFragment{4211bc38 #0 id=0x7f060064}
ParentFragment? onCreate()
ParentFragmentChild? onAttach(): ParentFragmentChild{420f4180 #0 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragment? onViewCreated()
ParentFragmentChild? onViewCreated()
ParentFragmentChild? onAttach(): ParentFragmentChild{42132a08 #1 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragmentChild? onViewCreated()
ParentFragment? onResume()
ParentFragment? onResume(), numChildFragments: 2
ParentFragmentChild? onResume()
ParentFragmentChild? onResume()
Screen rotation #2
ParentFragmentChild? onPause()
ParentFragmentChild? onPause()
ParentFragment? onPause()
ParentFragment? onSaveInstanceState()
ParentFragmentChild? onSaveInstanceState()
ParentFragmentChild? onSaveInstanceState()
ParentFragmentChild? onStop()
ParentFragmentChild? onStop()
ParentFragment? onStop()
ParentFragmentChild? onDestroyView()
ParentFragmentChild? onDestroyView()
ParentFragment? onDestroyView()
ParentFragmentChild? onDestroy()
ParentFragmentChild? onDetach()
ParentFragmentChild? onDestroy()
ParentFragmentChild? onDetach()
ParentFragment? onDestroy()
ParentFragment? onDetach()
ParentFragment? onAttach(): ParentFragment{42122a48 #0 id=0x7f060064}
ParentFragment? onCreate()
ParentFragmentChild? onAttach(): ParentFragmentChild{420ffd48 #0 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragmentChild? onAttach(): ParentFragmentChild{420fffa0 #1 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragment? onViewCreated()
ParentFragmentChild? onViewCreated()
ParentFragmentChild? onViewCreated()
ParentFragmentChild? onAttach(): ParentFragmentChild{42101488 #2 id=0x7f060064 com.kinoteatr.ua.filmgoer.test.ParentFragmentChild}
ParentFragmentChild? onCreate()
ParentFragmentChild? onViewCreated()
ParentFragment? onResume()
ParentFragment? onResume(), numChildFragments: 3
ParentFragmentChild? onResume()
ParentFragmentChild? onResume()
ParentFragmentChild? onResume()
They keep getting multiplied. Does anybody know why is that ?
