Saving MapFragment (Maps v2) State in Android

Question

I\'m working with the new GoogleMaps API (v2) and have some problems with the fragment. I have two fragments in my app (Map, List) and the user can switch between them. Work

Answer 1

I solved this problem by holding on to a reference to the CameraPosition on the map in the onDestroyView() method of the fragment; then using that CameraPosition when reinstatiating the map.

The context of my solution has it's own quirks, but essentially I have a map fragment nested within another fragment (which I'm hanging on to, even after it get's replaced). So this is the code in the parent fragment's onActivityCreated() method:

    GoogleMapOptions mapOptions = new GoogleMapOptions();
    if(_savedCameraPosition != null)
    {
        mapOptions.camera(_savedCameraPosition);
    }
    else
    {
        // Centre on Australia
        mapOptions.camera(CameraPosition.fromLatLngZoom(new LatLng(-24.25, 133.25), 15));
    }
    _mapFragment = new SupportMapFragment().newInstance(mapOptions);

    FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
    fragmentTransaction.add(R.id.map_holder, _mapFragment);
    fragmentTransaction.commit();

Then later in the same class I have:

@Override
public void onDestroyView()
{
    super.onDestroyView();
    _savedCameraPosition = _map.getCameraPosition();
}