huixiang_app/lib/address/address_map_page.dart

import 'dart:convert';

import 'package:amap_flutter_location/amap_flutter_location.dart';
import 'package:amap_flutter_base/amap_flutter_base.dart' as latlng;
import 'package:amap_flutter_location/amap_location_option.dart';
import 'package:amap_flutter_map/amap_flutter_map.dart';
// import 'package:amap_search_fluttify/amap_search_fluttify.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:shared_preferences/shared_preferences.dart';

class AddressMapPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _AddressMapPage();
  }
}

class _AddressMapPage extends State<AddressMapPage> {
//默认设置为不使用自定义地图，如果需要直接显示，在初始化是设置为true
  CustomStyleOptions _customStyleOptions = CustomStyleOptions(false);

  //加载自定义地图样式
  void _loadCustomData() async {
    if (null == _customStyleOptions) {
      _customStyleOptions = CustomStyleOptions(false);
    }
    ByteData styleByteData =
        await rootBundle.load('assets/map_style/style.data');
    _customStyleOptions.styleData = styleByteData.buffer.asUint8List();
    ByteData styleExtraByteData =
        await rootBundle.load('assets/map_style/style_extra.data');
    _customStyleOptions.styleExtraData =
        styleExtraByteData.buffer.asUint8List();
    //如果需要加载完成后直接展示自定义地图，可以通过setState修改CustomStyleOptions的enable为true
    setState(() {
      _customStyleOptions.enabled = true;
    });
  }

  AMapFlutterLocation aMapFlutterLocation;
  String city = "武汉市";
  String keyWord = "";

  @override
  void dispose() {
    super.dispose();
    aMapFlutterLocation.stopLocation();
    aMapFlutterLocation.destroy();

    // AmapSearch.instance.dispose();
  }

  @override
  void initState() {
    super.initState();

    if (aMapFlutterLocation == null) {
      AMapFlutterLocation.setApiKey("f39d1daa020a56f208eb2519f63e9534",
          "feaae7986201b571cace1b83728be5bb");
      aMapFlutterLocation = AMapFlutterLocation();
      aMapFlutterLocation.onLocationChanged().listen((event) {
        print("event: ${jsonEncode(event)}");
        if (event != null &&
            event["latitude"] != null &&
            event["longitude"] != null) {
          city = event["city"];
          latlng.LatLng latLng;
          if (event["latitude"] is String && event["longitude"] is String) {
            latLng = latlng.LatLng(double.tryParse(event["latitude"]),
                double.tryParse(event["longitude"]));
          } else {
            latLng = latlng.LatLng(event["latitude"], event["longitude"]);
          }
          saveLatLng(latLng);
          if (_mapController != null)
            _mapController.moveCamera(
              CameraUpdate.newCameraPosition(
                CameraPosition(
                  target: latLng,
                  zoom: 15.0,
                ),
              ),
            );
          searchPoi(latLng);
        }
      });
    }
    aMapFlutterLocation.setLocationOption(
      AMapLocationOption(
        needAddress: true,
        onceLocation: true,
        locationMode: AMapLocationMode.Hight_Accuracy,
        pausesLocationUpdatesAutomatically: true,
      ),
    );

    _loadCustomData();

    getLatLng();
    startLocation();
  }

  searchPoi(latlng.LatLng latLng) async {
    // var poiList = await AmapSearch.instance.searchAround(
    //   LatLng(latLng.latitude, latLng.longitude),
    //   keyword: keyWord,
    //   city: city,
    // );
    // markers = poiList.map(
    //   (e) => Marker(
    //     position: latlng.LatLng(e.latLng.latitude, e.latLng.longitude),
    //     anchor: Offset(0.5, 0.8),
    //     icon: BitmapDescriptor.fromIconPath(
    //         "assets/image/icon_address_location.png"),
    //   ),
    // );
    setState(() {});
  }

  List<Marker> markers;

  startLocation() async {
    // await AmapCore.init('feaae7986201b571cace1b83728be5bb');
    if (await Permission.locationWhenInUse.serviceStatus.isEnabled) {
      bool isShown = await Permission.contacts.shouldShowRequestRationale;
      if (isShown) {
        Fluttertoast.showToast(
            msg: "shouldShowRequest",
            toastLength: Toast.LENGTH_SHORT,
            gravity: ToastGravity.CENTER,
            timeInSecForIosWeb: 1,
            backgroundColor: Colors.red,
            textColor: Colors.white,
            fontSize: 16.0);
      }
      if (await Permission.location.isPermanentlyDenied) {
        //openAppSettings
      } else if (await Permission.location.isGranted) {
        aMapFlutterLocation.startLocation();
      } else {
        await Permission.location.request();
        startLocation();
      }
    } else {
      //enabledLocation
      // _mapController.getMapContentApprovalNumber()
      // _mapController
    }
  }

  AMapController _mapController;

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

  saveLatLng(latlng.LatLng latLng) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setString("latitude", "${latLng.latitude}");
    await prefs.setString("longitude", "${latLng.longitude}");
  }

  getLatLng() async {
    SharedPreferences.getInstance().then((value) => {
          setState(() {
            if (_mapController != null) {
              _mapController
                  .moveCamera(CameraUpdate.newCameraPosition(CameraPosition(
                target: latlng.LatLng(
                    double.tryParse(value.getString("latitude")),
                    double.tryParse(value.getString("longitude"))),
                zoom: 15.0,
              )));
            }
          })
        });
  }

  AMapWidget map;

  @override
  Widget build(BuildContext context) {
    latlng.AMapApiKey aMapApiKeys = latlng.AMapApiKey(
        androidKey: 'f39d1daa020a56f208eb2519f63e9534',
        iosKey: 'feaae7986201b571cace1b83728be5bb');

    if (map == null) {
      map = AMapWidget(
        initialCameraPosition: CameraPosition(
          target: latlng.LatLng(30.553111, 114.342366),
          zoom: 12.0,
        ),
        onMapCreated: onMapCreated,
        apiKey: aMapApiKeys,
        touchPoiEnabled: true,
        markers: markers.toSet(),
        scrollGesturesEnabled: true,
        customStyleOptions: _customStyleOptions,
        gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>[
          Factory<OneSequenceGestureRecognizer>(() => EagerGestureRecognizer())
        ].toSet(),
      );
    }
    return Scaffold(
      body: Column(
        children: [
          Expanded(
            child: Stack(
              children: [
                Container(
                  child: map,
                ),
                searchWidget(),
              ],
            ),
            flex: 1,
          ),
          Expanded(
            child: Container(),
            flex: 1,
          )
        ],
      ),
    );
  }

  Widget searchWidget() {
    return Container(
      height: 36,
      margin: EdgeInsets.fromLTRB(16, 48, 16, 8),
      padding: EdgeInsets.fromLTRB(10, 6, 16, 6),
      decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.all(Radius.circular(4)),
          boxShadow: [
            BoxShadow(
                color: Colors.black.withAlpha(12),
                offset: Offset(0, 3),
                blurRadius: 14,
                spreadRadius: 0)
          ]),
      child: Row(
        children: [
          InkWell(
            onTap: () {},
            child: Container(
              alignment: Alignment.center,
              padding: EdgeInsets.fromLTRB(10, 0, 6, 0),
              child: Text(
                "武汉市",
                style: TextStyle(
                  fontSize: 12,
                  color: Colors.black,
                ),
              ),
            ),
          ),
          Container(
            width: 1,
            color: Colors.black,
            margin: EdgeInsets.only(top: 2, bottom: 2, left: 10, right: 16),
          ),
          Icon(
            Icons.search,
            size: 24,
            color: Colors.black,
          ),
          Expanded(
            child: TextField(
              decoration: InputDecoration(border: InputBorder.none),
            ),
          ),
          Icon(
            Icons.close,
            size: 19,
            color: Colors.grey,
          ),
        ],
      ),
    );
  }
}