If you want to extends SupportMapFragment then you need to extends android.support.v4.app.Fragment insted of android.app.Fragment.

Sorry, im lost. Ill start over.

mapfragment.java This is the fragment, but now i dont really know how its should be build anymore. With the code you suggested. Im trying to use it in examples that i find on internet but i cant find any.

Like, this is what im trying to do right now

import com.google.android.gms.maps.GoogleMap; private SupportMapFragment map; private GoogleMap mMapView;

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);

    FragmentManager fm = getChildFragmentManager();
    map = (SupportMapFragment) fm.findFragmentById(R.id.map);
    if (map == null) {
        map = SupportMapFragment.newInstance();
        fm.beginTransaction().replace(R.id.map, map).commit();
    }



}

@Override
public void onResume() {
    super.onResume();
    if (mMapView == null) {
        mMapView = map.getMap();


    }
}

Use Below code:-

(SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map_fragment).getMapAsync(new OnMapReadyCallback() {
                    @Override
                    public void onMapReady(GoogleMap googleMap) {
                               mMap=googleMap;
                    }
                });

and your mMap varibale is com.google.android.gms.googleMap.

mMap = ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map));

This gives me an error, found 'com.google.android.gms.maps.SupportMapFragment, required 'com.google.android.gms.googleMap.