NullPointerException in Fragment's onCreateView() method

Question

My code:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // t-alk és impresszumhoz
         


        

Answer 1

Here are the internals of the Fragment life cycle:

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FragmentManager sets the activity value for a Fragment performing a state transition:

f.mActivity = mActivity;
f.mFragmentManager = mActivity.mFragments;
f.mCalled = false;
f.onAttach(mActivity);

Also, it sets this value to null, after detaching the Fragment:

f.mCalled = false;
f.onDetach();

. . .

f.mActivity = null;
f.mFragmentManager = null;

So, The value should not be null, between onAttach() and onDetach(), if every thing else is fine.

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To be safe, move all such code to onActivityCreated();