SavedInstanceState is always null in fragment

Question

I have a fragment attached to the activity using XML (and setContentView() in activity). A have a problem because I have very dynamic views in my fragment, so when orientation changes I must restore all states of views.

I have problem because I'm using something like that:

public void onSaveInstanceState(Bundle outState) {         super.onSaveInstanceState(outState);         outState.putBoolean("restore", true);         outState.putInt("nAndroids", 2);    } 

But after orientation change when methods with param Bundle savedInstanceState are called (like onCreateView etc) my savedInstanceState is always null.

I'm not a noob in the Android but now I'm very angry because of this problem...

public void onViewCreated(View view, Bundle savedInstanceState) {     super.onViewCreated(view, savedInstanceState);      if (savedInstanceState == null) {         //smth     } else {         // smthelse THIS IS NEVER REACHED BECAUSE BUNDLE IS ALWAYS NULL     }      getListView().setDivider(getResources().getDrawable(R.drawable.list_divider)); } 

Answer 1

All the problem was in that I don't declare android:id for the fragment in XML. Android needs ID or TAG to recognize stored fragment and reproduce all elements in it. So guys, remember - every instance of fragment needs unique id or tag!

Also, when setRetainInstance(true) is declared then bundle should always return null.

Answer 2

I had a similar problem where I was always getting savedInstanceState as null inspite of supplying the bundle to the Fragment.

The only solution that worked for me was to do

myFragment.setArguments(bundle)  

with my bundle from the Activity and do a

Bundle bundle = this.getArguments(); 

in onCreateView of the fragment.

Hope this helps someone else.