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/map_util.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/my_views.dart';
import 'package:dio/dio.dart';
import 'package:flutter/cupertino.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,
      rotateGesturesEnabled: false,
      touchPoiEnabled: true,
      onPoiTouched: _onPoiTouched,
      myLocationStyleOptions: MyLocationStyleOptions(
        true,
      ),
      markers: Set<Marker>.of(_markers.values),
    );

    return Scaffold(
      body: Column(
        children: [
          MyViews().myAppBar('amap', context, []),
          Expanded(
            child: Stack(
              children: [
                Container(
                  height: MediaQuery.of(context).size.height,
                  width: MediaQuery.of(context).size.width,
                  child: map,
                ),
                Container(
                  child: Row(
                    children: [
                      Expanded(
                        child: Padding(
                          padding: EdgeInsets.symmetric(horizontal: 10),
                          child: TextField(
                            controller: _controller,
                            cursorColor: MyColors.cFF4233,
                            cursorWidth: 1.0,
                            decoration: InputDecoration(
                                border: InputBorder.none,
                                disabledBorder: InputBorder.none,
                                enabledBorder: InputBorder.none,
                                focusedBorder: InputBorder.none,
                                hintText: '请输入地址',
                                hintStyle: TextStyle(
                                    color: MyColors.c999999,
                                    fontSize: 16),
                                isDense: true,
                                contentPadding: const EdgeInsets.fromLTRB(
                                    14, 4.5, 8, 4.5)),
                            maxLines: 1,
                            style: TextStyle(
                                color: MyColors.c333333,
                                fontSize: 16,
                                height: 1.3,
                                letterSpacing: 0.2),
                            onChanged: (t) {},
                          ),
                        ),
                      ),
                      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.symmetric(horizontal: 15,vertical: 30),
                )
              ],
            ),
          ),
        ],
      ),
      resizeToAvoidBottomInset: false,
    );
  }

  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=25&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=25&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.id] = Marker(
          position: LatLng(double.parse(element.location.split(',')[1]),
              double.parse(element.location.split(',')[0])),
          icon: BitmapDescriptor.fromIconPath('images/地址.png'),
          infoWindow: InfoWindow(title: element.name),
          // onTap: (markerId) {
          //   print(markerId);
          //   MapUtil.gotoAMap(double.parse(element.location.split(',')[0]),
          //       double.parse(element.location.split(',')[1]));
          // },
          // onDragEnd: (markerId, endPosition) =>
          //     _onMarkerDragEnd(markerId, endPosition),
        );
      });
      setState(() {
        if (entity.pois.length != 0) {
          _mapController
              .moveCamera(CameraUpdate.newCameraPosition(CameraPosition(
            target: LatLng(double.parse(entity.pois[0].location.split(',')[1]),
                double.parse(entity.pois[0].location.split(',')[0])),
            zoom: 18,
          )));
        }else{
          showToast('未搜索到你查找的地点');
        }
      });
    });
  }
}