Failure saving state - target not in fragment manager (setTargetFragment)

Question

I\'ve got a monkey crash whereby

java.lang.IllegalStateException: Failure saving state: FragmentB has target not in fragment manager: FragmentA
at android.s         


        

Answer 1

I just faced this problem and this is what I think is happening and how I fixed it:

Your FragmentA instance is being destroyed and another one is being created when there is a device rotation, for example. When this happens, your FragmentB keeps holding a reference to a FragmentA which doesn't exist anymore.

In this case, you have to reset FragmentB's target to be the new FragmentA instance.

I did that with the following code in FragmentA:

@Override
    public void onAttach(Context context) {

        super.onAttach(context);

        FragmentB fragment = (FragmentB) getFragmentManager().findFragmentByTag(FragmentBtag);

        if (fragment != null) {
            fragment.setTargetFragment(this, 0);
        }


    }

This way, whenever the FragmentA is attached to the Context, ie: a device rotation happens, FragmentB's target is reset, if FragmentB was created at first hand (if so, it would be on FragmentManager).

I hope it helps.