如何在颤振地图上获取标记纬度和经度？

Question

I'm using google_maps_flutter package to display the map and I placed a marker so the user can select a location (not the user location any location on the map).我正在使用 google_maps_flutter 包来显示地图，并放置了一个标记，以便用户可以选择一个位置（而不是用户在地图上的任何位置）。
like this Now the user can drag the marker where he want , my question is 像这样现在用户可以将标记拖到他想要的地方，我的问题是

Can I get latitude and longitude for marker after user drag it?用户拖动标记后，我可以获取标记的纬度和经度吗？

here is my full code 这是我的完整代码

class _BodyState extends State<Body> {
  MapType mapType = MapType.normal;
  Completer<GoogleMapController> _controller = Completer();
  LocationServices _locationServices;
  LocationData _locationData;
  CameraPosition _cameraPosition;
  Set<Marker> allMapMarkers;
  Marker userPicker;

  @override
  Widget build(BuildContext context) {
    _locationServices=Provider.of<LocationServices>(context);

    return FutureBuilder(
      future: _locationServices.getLocation().then((LocationData value) => _locationData=value),
      builder:(context,snapshot){
        if(_locationData==null){
         return Center(child: CircularProgressIndicator());
        }else{
          _cameraPosition=CameraPosition(target:LatLng(_locationData.latitude,_locationData.longitude),zoom: 19);
          setupMarkers();   // this set the Lat and Long for marker 
          return SafeArea(
            child: Stack(
              children: [
                GoogleMap(
                  onMapCreated: (GoogleMapController controller) {
                    _controller.complete(controller);
                  },
                  initialCameraPosition: _cameraPosition,
                  mapType: mapType,
                  compassEnabled: false,
                  zoomControlsEnabled: false,
                  markers: allMapMarkers,
                ),

Answer 1

You can use the Marker from google_maps_flutter plugin to fetch marker coordinates.您可以使用google_maps_flutter插件中的标记来获取标记坐标。 It has an onDrag property that returns a LatLng object that contains coordinates.它有一个onDrag属性，该属性返回一个包含坐标的LatLng对象。 Use the onDragEnd property to fetch the coordinates on where the marker has been placed.使用onDragEnd属性获取放置标记的坐标。

Marker(
  onTap: () {
    debugPrint('Tapped');
  },
  draggable: true,
  markerId: MarkerId('Marker'),
  onDragEnd: ((LatLng newPosition) {
    debugPrint(newPosition.latitude);
    debugPrint(newPosition.longitude);
  }),
)

如何在颤振地图上获取标记纬度和经度？

问题描述

1 个解决方案

解决方案1
0 2022-07-07 06:25:25

如何在颤振地图上获取标记纬度和经度？

问题描述

1 个解决方案

解决方案1 0 2022-07-07 06:25:25

解决方案1
0 2022-07-07 06:25:25