amap_location/example/lib/map_view_page.dart

import 'dart:async';
import 'dart:convert';

import 'package:amap_location_example/map_util.dart';
import 'package:flutter/material.dart';
import 'package:amap_location/amap_export.dart';
import 'dart:io';

class MapViewPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MapViewPageState();
  }
}

class _MapViewPageState extends State<MapViewPage> with WidgetsBindingObserver {
  final Completer<AmapViewController> _controller = Completer<AmapViewController>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Map View")),
      body: SizedBox(
        height: double.maxFinite,
        width: double.maxFinite,
        child: AmapView(
          onPlatformViewCreated: _onPlatformCreate,
        ),
      ),
    );
  }

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _dispose();
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    super.didChangeAppLifecycleState(state);
    onStateChange(state);
  }

  void onStateChange(AppLifecycleState state) async {
    if (!_controller.isCompleted)
      return;
    AmapViewController controller = await _controller.future;
    if (state == AppLifecycleState.paused) {
      controller.onPauseMapView();
    } else if (state == AppLifecycleState.resumed) {
      controller.onResumeMapView();
    }
  }

  void _initCityData(AmapViewController controller) async {
    // kingWay 的环境
    var httpClient = new HttpClient();
    HttpClientRequest request = await httpClient
        .getUrl(Uri.http("47.103.219.158:31103", "/api/v1/school_map/all_addr"));
    var response = await request.close();
    var responseBody = await response.transform(Utf8Decoder()).join();
    List<Map> data = jsonDecode(responseBody)['data'].cast<Map>();
    print(data.toString());

    controller.setMapMarkers(data.map((f) {
      var coordinate = f['coordinate'].toString().split(",");
      return AmapMarker(
          double.parse(coordinate[1]),
          double.parse(coordinate[0]),
          {"title": f["schoolname"], "content": f["address"], "tel": f["tel"]});
    }).toList());
  }

  void _onPlatformCreate(AmapViewController controller) {
    print("on map view create");
    _controller.complete(controller);
    controller.onCreateMapView();
    _initCityData(controller);
    controller.guideStream.listen((m) {
      showModalBottomSheet(
          context: context,
          builder: (context) {
            return Container(
              color: Colors.white,
              height: Platform.isIOS ? 158 + 50 : 158,
              margin: EdgeInsets.only(
                bottom: MediaQuery.of(context).padding.bottom,
              ),
              child: Column(
                mainAxisSize: MainAxisSize.max,
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                  Offstage(
                    offstage: !Platform.isIOS,
                    child: Column(
                      children: <Widget>[
                        Container(
                          height: 50,
                          child: Material(
                            color: Colors.white,
                            child: InkWell(
                              child: Center(
                                child: Text(
                                  "苹果地图",
                                  style: TextStyle(
                                    fontSize: 15,
                                  ),
                                ),
                              ),
                              onTap: () => _goThirdPartMapApp(context, MapType.Apple, m),
                            ),
                          ),
                        ),
                        Divider(
                          height: 1,
                        ),
                      ],
                    ),
                  ),
                  Container(
                    height: 50,
                    child: Material(
                      color: Colors.white,
                      child: InkWell(
                        child: Center(
                          child: Text(
                            "高德地图",
                            style: TextStyle(
                              fontSize: 15,
                            ),
                          ),
                        ),
                        onTap: () => _goThirdPartMapApp(context, MapType.AMap, m),
                      ),
                    ),
                  ),
                  Divider(
                    height: 1,
                  ),
                  Container(
                    height: 50,
                    child: Material(
                      color: Colors.white,
                      child: InkWell(
                        child: Center(
                          child: Text(
                            "百度地图",
                            style: TextStyle(
                              fontSize: 15,
                            ),
                          ),
                        ),
                        onTap: () => _goThirdPartMapApp(context, MapType.Baidu, m),
                      ),
                    ),
                  ),
                  Divider(
                    height: 1,
                  ),
                  Container(
                    height: 50,
                    child: Material(
                      color: Colors.white,
                      child: InkWell(
                        child: Center(
                          child: Text(
                            "取消",
                            style: TextStyle(
                              fontSize: 15,
                            ),
                          ),
                        ),
                        onTap: () {
                          Navigator.of(context).pop();
                        },
                      ),
                    ),
                  ),
                ],
              ),
            );
          });
    });
  }

  void _goThirdPartMapApp(BuildContext context, MapType type, dynamic data) async {
    // close bottom sheet
    Navigator.of(context).pop();
    bool success;
    if (type == MapType.AMap) {
      success = await MapUtil.goAMap(data['lon'], data['lat']);
    } else if (type == MapType.Baidu) {
      success = await MapUtil.goBaiduMap(data['lon'], data['lat']);
    } else if (type == MapType.Apple) {
      success = await MapUtil.goAppleMap(data['lon'], data['lat']);
    }
    print("jump ${success ? "successful" : "failed"}");
  }

  void _dispose() async {
    if (!_controller.isCompleted)
      return;
    AmapViewController controller = await _controller.future;
    controller.dispose();
  }
}

enum MapType {
  Apple, Baidu, AMap
}