如何在flutter中使用HERE地图获取用户的当前位置？

dependencies:
  here_sdk: ^X.X.X

import 'package:here_sdk/core.dart';
import 'package:here_sdk/mapview.dart';
import 'package:here_sdk/location.dart';

HereMapController _hereMapController;

@override
void initState() {
  super.initState();
  HereMap.instance.setApiKey("YOUR_API_KEY");
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: HereMap(
      onMapCreated: (HereMapController controller) {
        _hereMapController = controller;
      },
    ),
  );
}

LocationEngine _locationEngine;
Location _currentLocation;

@override
void initState() {
  super.initState();
  HereMap.instance.setApiKey("YOUR_API_KEY");
  _initLocationEngine();
}

void _initLocationEngine() {
  _locationEngine = LocationEngine();
  _locationEngine.addLocationListener(_onLocationUpdated);
  _locationEngine.start();
}

void _onLocationUpdated(Location location) {
  setState(() {
    _currentLocation = location;
  });
}

@override
void dispose() {
  _locationEngine.removeLocationListener(_onLocationUpdated);
  _locationEngine.stop();
  super.dispose();
}

Marker _currentLocationMarker;

@override
void initState() {
  super.initState();
  HereMap.instance.setApiKey("YOUR_API_KEY");
  _initLocationEngine();
  _createCurrentLocationMarker();
}

void _createCurrentLocationMarker() {
  _currentLocationMarker = Marker();
  _hereMapController.mapScene.addMapMarker(_currentLocationMarker);
}

void _updateCurrentLocationMarker() {
  if (_currentLocation != null) {
    GeoCoordinates coordinates = GeoCoordinates(
      _currentLocation.latitude,
      _currentLocation.longitude,
    );
    _currentLocationMarker.coordinates = coordinates;
  }
}

@override
void dispose() {
  _locationEngine.removeLocationListener(_onLocationUpdated);
  _locationEngine.stop();
  _hereMapController.mapScene.removeMapMarker(_currentLocationMarker);
  super.dispose();
}

@override
void didChangeDependencies() {
  super.didChangeDependencies();
  _updateCurrentLocationMarker();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: HereMap(
      onMapCreated: (HereMapController controller) {
        _hereMapController = controller;
        _updateCurrentLocationMarker();
      },
    ),
  );
}