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/address_bean_entity.dart';
import 'package:bbyyy/beans/poi_bean_entity.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;
  List<PoiBeanPois> pois;
  BitmapDescriptor _markerIcon;
  PoiBeanPois poi;
  bool searchMode = true;

  @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) {
    if (null == _markerIcon) {
      _markerIcon = BitmapDescriptor.defaultMarker;
    }
    final AMapWidget map = AMapWidget(
      initialCameraPosition: _kInitialPosition,
      onMapCreated: onMapCreated,
      rotateGesturesEnabled: false,
      touchPoiEnabled: true,
      tiltGesturesEnabled: false,
      onPoiTouched: _onPoiTouched,
      myLocationStyleOptions: MyLocationStyleOptions(
        true,
      ),
      markers: Set<Marker>.of(_markers.values),
      onTap: (LatLng latLng){
        print('================|${latLng.latitude},${latLng.longitude}|===================');
        markTheClickLocation(latLng);
      },
    );

    return Scaffold(
      body: Column(
        children: [
          MyViews().myAppBar('选择地址', context, [
            GestureDetector(
              onTap: (){
                setState(() {
                  _markers.clear();
                  pois?.clear();
                  poi = null;
                  searchMode = !searchMode;
                  _mapController.moveCamera(CameraUpdate.newCameraPosition(CameraPosition(
                    target: LatLng(MyCookie().location.latitude, MyCookie().location.longitude),
                    zoom: 15,
                  )));
                });
              },
              behavior: HitTestBehavior.translucent,
              child: Container(
                margin: EdgeInsets.symmetric(vertical: 5,horizontal: 10),
                child: Text(
                  searchMode?'手动选择':'搜索选择',
                  style: TextStyle(color: MyColors.c333333, fontSize: 14),
                ),
              ),
            )
          ]),
          Expanded(
            child: Stack(
              children: [
                Container(
                  height: MediaQuery.of(context).size.height,
                  width: MediaQuery.of(context).size.width,
                  child: map,
                ),
                if(searchMode)
                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: () {
                          MyTools().hideKeyboard(context);
                          inquirePOI();
                        },
                        child: Container(
                          color: MyColors.cFF4233,
                          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),
                ),
                if (poi != null)
                  Container(
                    margin: EdgeInsets.fromLTRB(
                        12,
                        MediaQuery.of(context).size.height - 200 - 12 - 45,
                        12,
                        12),
                    width: double.infinity,
                    height: 150,
                    decoration: BoxDecoration(
                        color: Colors.white,
                        borderRadius: BorderRadius.circular(12),
                        boxShadow: [
                          BoxShadow(
                            color: MyColors.c7FE1E1E1,
                            blurRadius: 5.0,
                          ),
                        ]),
                    child: Column(
                      children: [
                        Text(poi == null ? '' : poi.name),
                        Text(poi == null ? '' : poi.address),
                        GestureDetector(
                          onTap: () {
                            Navigator.pop(context, poi);
                          },
                          behavior: HitTestBehavior.translucent,
                          child: Container(
                            decoration: BoxDecoration(
                                color: MyColors.cFF4233,
                                borderRadius: BorderRadius.circular(20)),
                            height: 40,
                            width: 120,
                            child: Text(
                              '就是这里',
                              style:
                                  TextStyle(color: Colors.white, fontSize: 16),
                            ),
                            alignment: Alignment.center,
                          ),
                        )
                      ],
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                    ),
                  )
              ],
            ),
          ),
        ],
      ),
      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) {
    print('_onPoiTouched');
    print('================|${poi.latLng.latitude},${poi.latLng.longitude}|===================');
    markTheClickLocation(poi.latLng);

  }

  void inquirePOI() {
    String v1 =
        '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(v1);
    Dio().get(v1).then((value) {
      print(value);
      PoiBeanEntity entity =
          PoiBeanEntity.fromJson(json.decode(value.toString()));
      pois = entity.pois;
      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: _markerIcon,
          infoWindow: InfoWindow(title: element.name),
          onTap: (markerId) {
            print(markerId);
            // MapUtil.gotoAMap(double.parse(element.location.split(',')[0]),
            //     double.parse(element.location.split(',')[1]));
            setState(() {
              poi = element;
            });
          },
        );
      });
      setState(() {
        if (entity.pois.length != 0) {
          showBottomSheet();
          _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');
        }
      });
    });
  }

  //显示底部弹框的功能
  void showBottomSheet() {
    //用于在底部打开弹框的效果
    showModalBottomSheet(
        builder: (BuildContext context) {
          //构建弹框中的内容
          return Container(
            child: ListView.builder(
              padding: EdgeInsets.all(8),
              itemBuilder: (BuildContext context, int index) {
                return GestureDetector(
                  onTap: () {
                    _mapController.moveCamera(
                        CameraUpdate.newCameraPosition(CameraPosition(
                      target: LatLng(
                          double.parse(pois[index].location.split(',')[1]),
                          double.parse(pois[index].location.split(',')[0])),
                      zoom: 15,
                    )));
                    Navigator.pop(context);

                    setState(() {
                      poi = pois[index];
                    });
                  },
                  behavior: HitTestBehavior.translucent,
                  child: Column(
                    children: [
                      Text(
                        pois[index].name,
                        style: TextStyle(fontSize: 16),
                      ),
                      Text(
                        pois[index].address,
                        style: TextStyle(fontSize: 12),
                      ),
                      Container(
                        height: .5,
                        color: Colors.grey[200],
                        margin: EdgeInsets.symmetric(vertical: 10),
                      )
                    ],
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    crossAxisAlignment: CrossAxisAlignment.start,
                  ),
                );
              },
              itemCount: pois.length,
            ),
          );
        },
        context: context);
  }

  void markTheClickLocation(LatLng latLng) {
    print('https://restapi.amap.com/v3/geocode/regeo?output=json&location=${latLng.longitude},${latLng.latitude}&key=5dcd9f0ed7d51aefb5b2f73dba1069cb&radius=10&extensions=all');
    Dio()
        .get(
        'https://restapi.amap.com/v3/geocode/regeo?output=json&location=${latLng.longitude},${latLng.latitude}&key=5dcd9f0ed7d51aefb5b2f73dba1069cb&radius=10&extensions=all')
        .then((value) {
      // print('value.toString()------------${value.toString()}');
      AddressBeanEntity addressBeanEntity =
      AddressBeanEntity.fromJson(json.decode(value.toString()));
      poi = PoiBeanPois();
      poi.location = '${latLng.longitude},${latLng.latitude}';
      poi.pname = addressBeanEntity.regeocode.addressComponent.province;
      poi.cityname = addressBeanEntity.regeocode.addressComponent.city;
      poi.adname = addressBeanEntity.regeocode.addressComponent.district;
      poi.address = addressBeanEntity.regeocode.pois[0].address;
      poi.name = addressBeanEntity.regeocode.pois[0].name;
      _markers['手动选择'] = Marker(
        position: latLng,
        icon: _markerIcon,
        infoWindow: InfoWindow(title: poi.name),
      );
      _mapController.moveCamera(CameraUpdate.newCameraPosition(CameraPosition(
        target: latLng,
        zoom: 20,
      )));
      setState(() {

      });
    });
  }
}