onSaveInstanceState is not being called in Fragment

Question

I know that people have asked this question, but I followed all the answers and I still have the same problem. I have two scripts One is the fragment manager (IngredientsAct

Answer 1

I had a similar problem where I was trying to get a Fragment to save its state but onSaveInstanceState() wasn't being called on FragmentTransaction.replace(). I was trying to find a solution for this and thought, if the Fragment itself can't save its own state then can't whatever is doing the replacing save it. So I did something like this:

In the Fragment have a method called getState() or whatever you want:

public Bundle getState()
{
    // save whatever you would have in onSaveInstanceState() and return a bundle with the saved data
}

Then in the hosting object, save that bundle to its instance variables before replacing the Fragment and set the argument to that saved bundle when switching back.

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
// assume Fragment a exists and you're trying to save the state and "state" is an instance variable
state = a.getState();
ft.replace(android.R.id.content, b);

Then when swapping back to Fragment a you would pass the bundle as an argument.

a.setArguments(state);
ft.replace(android.R.id.content, a);

I didn't look into your code too deeply but it sounds similar to the problem I had from your description.