Fragment - InstantiationException: no empty Constructor - Google Maps v2?

Question

I get this error message, when I open a closed App again via App-Change button: ``` Caused by: java.lang.InstantiationException: can't instantiate class com.*.FragmentContact$1; no empty constructor ``` I've found several tips about Inner-Classes and to make them static etc. But this FragmentContact is a public class in a *.java-file and has a public empty constructor. I'm using Google Maps Api v2 in this project and do a trick somewhere from the internet to setup my MapView. Look here: ``` @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_contact, null); try { MapsInitializer.initialize(this.getActivity().getApplicationContext()); } catch (GooglePlayServicesNotAvailableException e) { e.printStackTrace(); } fragment = new SupportMapFragment() { @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mMap = fragment.getMap();…

Accepted Answer

But these FragmentContact is a public class in a *.java-file and has a public empty constructor.

The error is not complaining about `FragmentContact`. It is complaining about the first inner class of `FragmentContact` (`FragmentContact$1`). You cannot have a `Fragment` implemented as an inner class of anything, as it cannot be instantiated from outside the outer class. A `static` inner class is fine.

Fragment - InstantiationException: no empty Constructor -> Google Maps v2?

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