app/lib/paegs/map_demo/map_demo_page.dart

import 'dart:convert';

import 'package:amap_flutter_base/amap_flutter_base.dart';
import 'package:amap_flutter_map/amap_flutter_map.dart';
import 'package:bbyyy/beans/poi_bean_entity.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';

class MapDemoPage extends StatefulWidget {
  @override
  _MapDemoPageState createState() => _MapDemoPageState();
}

class _MapDemoPageState extends State<MapDemoPage> {
  CameraPosition _kInitialPosition;
  List<Widget> _approvalNumberWidget = [];
  TextEditingController _controller = TextEditingController();
  Map<String, Marker> _markers = <String, Marker>{};
  Widget _poiInfo;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    _kInitialPosition = CameraPosition(
      target:
          LatLng(MyCookie().location.latitude, MyCookie().location.longitude),
      zoom: 15.0,
    );
  }

  @override
  Widget build(BuildContext context) {
    final AMapWidget map = AMapWidget(
      initialCameraPosition: _kInitialPosition,
      onMapCreated: onMapCreated,
      touchPoiEnabled: true,
      onPoiTouched: _onPoiTouched,
      myLocationStyleOptions: MyLocationStyleOptions(
        true,
        circleFillColor: Colors.lightBlue,
        circleStrokeColor: Colors.blue,
        circleStrokeWidth: 1,
      ),
    );

    return Scaffold(
      body: Stack(
        children: [
          Container(
            height: MediaQuery.of(context).size.height,
            width: MediaQuery.of(context).size.width,
            child: map,
          ),
          Container(
            child: Row(
              children: [
                Expanded(
                    child: TextField(
                  controller: _controller,
                )),
                GestureDetector(
                    onTap: () {
                      inquirePOI();
                    },
                    child: Container(
                      color: Colors.blue,
                      child: Text(
                        '搜索',
                        style: TextStyle(color: Colors.white, fontSize: 18),
                      ),
                      width: 100,
                      height: 48,
                      alignment: Alignment.center,
                    ))
              ],
            ),
            color: Colors.white,
            margin: EdgeInsets.only(top: 50),
          )
        ],
      ),
    );
  }

  AMapController _mapController;

  void onMapCreated(AMapController controller) {
    setState(() {
      _mapController = controller;
      getApprovalNumber();
    });
  }

  /// 获取审图号
  void getApprovalNumber() async {
    //普通地图审图号
    String mapContentApprovalNumber =
        await _mapController?.getMapContentApprovalNumber();
    //卫星地图审图号
    String satelliteImageApprovalNumber =
        await _mapController?.getSatelliteImageApprovalNumber();
    setState(() {
      if (null != mapContentApprovalNumber) {
        _approvalNumberWidget.add(Text(mapContentApprovalNumber));
      }
      if (null != satelliteImageApprovalNumber) {
        _approvalNumberWidget.add(Text(satelliteImageApprovalNumber));
      }
    });
    print('地图审图号（普通地图）: $mapContentApprovalNumber');
    print('地图审图号（卫星地图): $satelliteImageApprovalNumber');
  }

  Widget showPoiInfo(AMapPoi poi) {
    return Container(
      alignment: Alignment.center,
      color: Color(0x8200CCFF),
      child: Text(
        '您点击了 ${poi.name}',
        style: TextStyle(fontWeight: FontWeight.w600),
      ),
    );
  }

  void _onPoiTouched(AMapPoi poi) {
    setState(() {
      _poiInfo = showPoiInfo(poi);
    });
  }

  void inquirePOI() {
    Dio()
        .get(
            'https://restapi.amap.com/v3/place/text?keywords=${_controller.text.toString()}&city=${MyCookie().location.city}&output=json&offset=50&page=1&key=5dcd9f0ed7d51aefb5b2f73dba1069cb&extensions=all')
        .then((value) {
          print('https://restapi.amap.com/v3/place/text?keywords=${_controller.text.toString()}&city=${MyCookie().location.city}&output=json&offset=50&page=1&key=5dcd9f0ed7d51aefb5b2f73dba1069cb&extensions=all');
      print(value);
      PoiBeanEntity entity = PoiBeanEntity().fromJson(json.decode(value.toString()));
      entity.pois.forEach((element) {
        print(element.name);
        _markers[element.name] = Marker(
          position: LatLng(double.parse(element.location.split(',')[0]),double.parse(element.location.split(',')[1])),
          icon: BitmapDescriptor.fromIconPath('images/地址.png'),
          infoWindow: InfoWindow(title: element.name),
          // onTap: (markerId) => _onMarkerTapped(markerId),
          // onDragEnd: (markerId, endPosition) =>
          //     _onMarkerDragEnd(markerId, endPosition),
        );
      });
    });
  }
}