google-maps - 如何从 flutter 中的谷歌地图获取位置的纬度和经度坐标？

Question

我使用的是 flutter 1.3** 版本，它没有在 GoogleMap() 中定义 markers 语法

GoogleMap(
  onMapCreated: _onMapCreated,
  markers: markers,
)

所以我使用下面的代码尝试从 map 中获取纬度和经度

 void _onMapCreated(GoogleMapController controller){
    this._controller = controller;
    controller.onMarkerTapped.add(_onMarkerTapped);
          }

  void _onMarkerTapped(Marker marker) {
         ...
           }

Widget build(BuildContext context) {
   GoogleMap(
        onMapCreated: _onMapCreated,
        options: GoogleMapOptions(
          ...
        ));
      }

我的问题是如何使用 MarkerOptions 和以上方法将经纬度转换为字符串值？

Answer 1

 LocationData currentLocation;


 getLocation() async {

  var location = new Location();

  location.onLocationChanged().listen((  currentLocation) {

    print(currentLocation.latitude);
    print(currentLocation.longitude);
    setState(() {

        latLng =  LatLng(currentLocation.latitude, currentLocation.longitude);
     });

    print("getLocation:$latLng");

      loading = false;
    });

  }

From this above code, you simply get a Lattitude and longitude and use this latLng variable on

  initialCameraPosition: CameraPosition(
      target: latLng,
      zoom: 17.4746,
    ),

this method in GoogleMap