Try Following Code
LocationManager locationManager = (LocationManager) getActivity()
.getSystemService(Context.LOCATION_SERVICE);
String locationProvider = LocationManager.NETWORK_PROVIDER;
Location lastlocation = locationManager.getLastKnownLocation(locationProvider);
String CurLat = String.valueOf(lastlocation.getLatitude());
String Curlongi= String.valueOf(lastlocation.getLongitude());