Android MapView NullPointerException

MainMapView.class

public class MainMapView extends FrameLayout {

    @InjectView(R.id.map) MapView mapView;
    public MainMapView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    
    
    private void init() {
        inflate(getContext(), R.layout.discount_map_content, this);
        ButterKnife.inject(this);
    }
    
    public void onCreate(Bundle savedInstanceState) {
        mapView.onCreate(savedInstanceState);

        // Gets to GoogleMap from the MapView and does initialization stuff
        mapView.getMap().getUiSettings().setMyLocationButtonEnabled(false);
        mapView.getMap().setMyLocationEnabled(true);

        // Needs to call MapsInitializer before doing any CameraUpdateFactory calls
        MapsInitializer.initialize(getContext());

        // Updates the location and zoom of the MapView
        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(Position.getCurrent(getContext()).toLatLng(), 14);
        mapView.getMap().moveCamera(cameraUpdate);
    }