5

I am using support library v4 and failing to save fragment's state.

@Override
protected void onSaveInstanceState(Bundle outState)
{
    ...
    if(mFragment != null)
        getSupportFragmentManager().putFragment(outState, "frag", mFragment);
    ...
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
    ...
    if(savedInstanceState != null)
    {
        //Here I get NullPointerException
        getSupportFragmentManager().getFragment(savedInstanceState, "frag");
    }
    ...
}

When I call getFragment() NullPointerException is thrown (savedInstanceState contains entry with "frag").

Here is the part of logcat output:

04-18 00:10:56.719: E/AndroidRuntime(14644): Caused by: java.lang.NullPointerException
04-18 00:10:56.719: E/AndroidRuntime(14644):    at android.support.v4.app.FragmentManagerImpl.getFragment(FragmentManager.java:569)

Also I have tried to call getFragments() which returns null. That appears to me strange.

I will appreciate any help!

Solution:

I forgot to use super.onSaveInstanceState(outState); inside onCreate method.

Blo
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Tzoiker
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    Do you call onSaveInstanceState method inside your parent activity? ([see](http://stackoverflow.com/a/8752360/2668136)) – Blo Apr 17 '14 at 20:42
  • Yeah, very stupid of me, forgot to call `super.onSaveInstanceState(outState)`.Thank You very much! – Tzoiker Apr 17 '14 at 20:50

1 Answers1

4

Thanks to @Fllo. The problem was that I forgot to call onSaveInstanceState() of parent activity. 

@Override
protected void onSaveInstanceState(Bundle outState)
{
    //Added this and the problem was solved
    super.onSaveInstanceState(outState);
    ...
}
Tzoiker
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