Flutter架构搭建《四》 即时通讯之地图消息

Flutter架构搭建《四》 即时通讯之地图消息

flutter_map

我们将使用flutter_map来构建我们得地图控件

在pubspec.yaml文件中加入依赖，注意添加权限到AndroidManifest.xml

   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
   <uses-permission android:name="android.permission.INTERNET" />

mapbox

由于使用得地图需要调网络地图，我们需要一个token登陆这个网站，注册账号https://studio.mapbox.com/
注册好登陆后
在account中有creat token键值，创建页面默认勾选就行了，这样你就可以看到自己得token，在使用过程中我们会用到token

打开Api文档

api文档网站 此网站可以查看相关api

我们使用得在这里，相关其他使用方法可以自行查阅

Flutter中使用

/**
 * @Author: Nimodou
 * @Blog: https://blog.csdn.net/qq_28535319
 * @Email: [email protected]
 * @Email: [email protected]
 * @Date: 2019/7/31
 * @Description:
 */
//需要导包
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_huanxin/bean/message_bean.dart';
import 'package:flutter_huanxin/utils/rout_utils.dart';
import 'package:flutter_huanxin/utils/screen_utils.dart';
import 'package:flutter_huanxin/widget/appbar_customer.dart';
import 'package:flutter_huanxin/widget/button_customer_widget.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:geocoder/geocoder.dart';
import 'package:geocoder/model.dart';
import 'package:latlong/latlong.dart';
import 'package:oktoast/oktoast.dart';
import 'dart:math' as math;
import '../theme_utils.dart';
class MapTestPage extends StatefulWidget{
  LatLng latLng;
  MapTestPage({this.latLng});
  @override
  State createState() {
    return MapTestState();
  }
}
class MapTestState extends State<MapTestPage>{
  List<Marker> markers;
   List<LatLng> tappedPoints = [];
  MapController mapController;
  String strAdress;
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    mapController = MapController();
  
  }

  @override
  Widget build(BuildContext context) {

	 markers = tappedPoints.map((latlng) {
	      return Marker(
	        width: 30.0,
	        height: 30.0,
	        point: latlng,
	        builder: (ctx) => Container(
	          child: Icon(Icons.location_searching,color: ThemeApp.green_1,),
	        ),
	      );
	    }).toList();
	    markers.add(Marker(
	        width: 30.0,
	        height: 30.0,
	        point: new  LatLng(widget.latLng?.latitude??39.9,widget.latLng?.longitude??116.4),
	        builder: (ctx)=>
	        new Container(
	          child: Icon(Icons.location_on,color: ThemeApp.green_1,),
	        )
	    ));
    return Scaffold(
      resizeToAvoidBottomPadding: false,
      appBar: null,
      body:FlutterMap(
                mapController: mapController,
                options: MapOptions(
                  center: LatLng(39.6, 116.2),
                  zoom: 10.0,
                    onTap: _handleTap
                ),
                layers: [
                  TileLayerOptions(
                    urlTemplate:"https://api.mapbox.com/v4/{tileset_id}/{z}/{x}/{y}@2x.jpg90?access_token={accessToken}",
                    subdomains: ['a', 'b', 'c'],
                    additionalOptions: {
                      'accessToken': 'pk.eyJ1Ijoibmltb2RvdSIsImEiOiJjazJhMTVsNGcwaXVjM21wZTU4NjA4NnNwIn0.2S-YnxwI-s32U9P3yC28rQ',
                      'tileset_id': 'mapbox.streets',
                    },
                    // For example purposes. It is recommended to use
                    // TileProvider with a caching and retry strategy, like
                    // NetworkTileProvider or CachedNetworkTileProvider
                    tileProvider: CachedNetworkTileProvider(),
                  ),
                  MarkerLayerOptions(markers: markers)
                ],
              )
    );
  }

  void _handleTap(LatLng latlng) {
    tappedPoints.clear();
    setState(() {
      tappedPoints.add(latlng);
      mapController.move(latlng, 10);
    });
  }
}

效果

我把它写在了聊天控件中，其中导航跳转应用可以自行编写

路还很长，慢慢走