Flutter集成高德定位和地图功能

import 'package:flutter/material.dart';
import 'package:amap_location/amap_location.dart'; // 高德定位插件
import 'package:flutter_map/flutter_map.dart'; // flutter地图插件
import 'package:latlong/latlong.dart'; // 经纬度处理插件
 
class AMapLocationExample extends StatefulWidget {
  @override
  _AMapLocationExampleState createState() => _AMapLocationExampleState();
}
 
class _AMapLocationExampleState extends State<AMapLocationExample> {
  AMapLocation _locationTracker = AMapLocation();
  Position _currentPosition;
 
  @override
  void initState() {
    super.initState();
    _locationTracker.onLocationResult.listen((Location location) {
      if (!mounted) return;
      setState(() {
        _currentPosition = Position(
          latitude: location.latitude,
          longitude: location.longitude,
        );
      });
    });
    _locationTracker.startLocation();
  }
 
  @override
  void dispose() {
    _locationTracker.dispose();
    super.dispose();
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('高德定位和地图示例'),
      ),
      body: _currentPosition != null
          ? FlutterMap(
              options: MapOptions(
                center: LatLng(_currentPosition.latitude, _currentPosition.longitude),
                zoom: 13.0,
              ),
              layers: [
                TileLayerOptions(
                  urlTemplate: "https://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={x}&y={y}&z={z}",
                ),
                MarkerLayerOptions(
                  markers: [
                    Marker(
                      width: 80.0,
                      height: 80.0,
                      point: _currentPosition,
                      builder: (ctx) => Container(
                        child: Icon(
                          Icons.location_on,
                          size: 80,
                          color: Colors.blue,
                        ),
                      ),
                    ),
                  ],
                ),
              ],
            )
          : Center(child: CircularProgressIndicator()),
    );
  }
}

这段代码首先导入了必要的包，然后定义了一个AMapLocationExample的StatefulWidget，在其状态下初始化高德定位并获取当前位置，同时将位置和地图结合展示出来。如果当前位置不可用，则显示一个圆形进度指示器。这个例子展示了如何在Flutter中集成高德定位和地图功能的基本步骤。