Android : Get current location in a static context

I'm just starting studying android. I have a Navigation Drawer Activity. I'm trying to get my current location. This is my code:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {

            View rootView=inflater.inflate(R.layout.fragment_main, container, false);
                int sectionNumber = getArguments().getInt(ARG_SECTION_NUMBER);
                switch (sectionNumber) {
                    case 1:
                        rootView = inflater.inflate(R.layout.fragment_monitor, container, false);
                        TextView lat = (TextView) rootView.findViewById(R.id.lat);
                        LocationManager locationmanager;
                        String context=Context.LOCATION_SERVICE;
                        locationmanager=(LocationManager) getSystemService(context);
                        String provider=LocationManager.NETWORK_PROVIDER;
                        Location location= locationmanager.getLastKnownLocation(provider);

                        double lat = location.getLatitude();
                        double lon = location.getLongitude();

                        break;
                    case 2:
                        rootView = inflater.inflate(R.layout.activity_mapa, container, false);
                        break;
                    case 3:
                        break;
                    default:
                        rootView = inflater.inflate(R.layout.fragment_main, container, false);
                }
            return rootView;
        }

It has an error in getSystemService() method. It says that a non-static method cannot be referenced from a static context.

Anyone knows how to solve this?

thanks.