flutter集成高德地图获取位置

flutter集成高德地图获取位置

flutter集成高德地图获取位置

准备工作

在创建安卓应用获取SHA1 获取当前位置

添加依赖文件配置

build.gradle文件配置AndroidManifest.xml配置 获取定位

准备工作

高德开放平台地址https://lbs.amap.com/tools/picker

在创建安卓应用

在控制台我的应用中创建应用
点击添加

由上图可以看出我们还需要获取安全码SHA1才能添加
添加方法高德官方也已经给出
https://lbs.amap.com/faq/android/map-sdk/create-project/43112

获取SHA1

这里我们采用的是使用 keytool（jdk自带工具）获取SHA1

在控制台输入cd .android定位到.android目录下继续在控制台输入命令：调试版本使用 debug.keystore，命令为：keytool -list -v -keystore debug.keystore 发布版本使用 apk 对应的 keystore，命令为：keytool -list -v -keystore apk的keystore按照要求输入密钥库口令，注意这里输入后是没有显示的
选择sha1复制即可（注意调试版安全码和发布版安全码我们可以都写成一样的）

准备工作完成后创建的应用如图

获取当前位置 添加依赖

高德定位Flutter插件地址https://pub.dev/packages/amap_flutter_location
添加依赖

dependencies:
  amap_flutter_location: ^3.0.0

导包

import 'package:amap_flutter_location/amap_flutter_location.dart';

权限检测插件地址https://pub.dev/packages/permission_handler

添加依赖

dependencies:
  permission_handler: ^8.3.0

导包

import 'package:permission_handler/permission_handler.dart';

文件配置

高德官方给出一定的指引https://developer.amap.com/api/flutter/gettingstarted

build.gradle文件配置

修改你的android/app/build.gradle文件配置签名文件以及配置 implementation

signingConfigs {
        release {
            //发布版本的签名配置
            //还要先将我们使用的androidkeystore.jks'导入到flutter_apponeandroid下
        storeFile file('androidkeystore.jks')
        keyAlias "key0"
        storePassword "20010101"
        keyPassword "20010101"
        }
        debug {
        //调试版本的签名配置
        storeFile file('androidkeystore.jks')
        keyAlias "key0"
        storePassword "20010101"
        keyPassword "20010101"
        }
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
        }
        debug {
           // TODO: Add your own signing config for the release build. 
           // Signing with the debug keys for now, so `flutter run --release` works. 
           signingConfig signingConfigs.debug
        
       }
    }

使用高德SDK之前配置可以参考高德官方文档https://developer.amap.com/api/android-location-sdk/guide/create-project/android-studio-create-project

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation "com.amap.api:location:latest.integration"
}

AndroidManifest.xml配置

android/app/src/main/AndroidManifest.xml下的配置

主要用于配置高德Key和申请权限：

在AndroidManifest.xml的application标签中配置Key：

application标签中配置Key

application标签中声明service组件

在AndroidManifest.xml中配置权限:

获取定位

import 'package:flutter/material.dart';

import 'dart:async';
// import 'dart:io';
import 'package:amap_flutter_location/amap_flutter_location.dart';
import 'package:amap_flutter_location/amap_location_option.dart';
import 'package:permission_handler/permission_handler.dart';

class LocationPage extends StatefulWidget {
  LocationPage({Key? key}) : super(key: key);

  _LocationPageState createState() => _LocationPageState();
}

class _LocationPageState extends State {
  //获取数据
  // Map _locationResult;
  String _latitude = ""; //纬度
  String _longitude = ""; //经度

  //监听定位
  late StreamSubscription> _locationListener;
  //实例化插件
  AMapFlutterLocation _locationPlugin = new AMapFlutterLocation();

  @override
  void initState() {
    // TODO: implement initState
    super.initState();


    /// 动态申请定位权限
    requestPermission();
        AMapFlutterLocation.updatePrivacyAgree(true);
    AMapFlutterLocation.updatePrivacyShow(true, true);
    AMapFlutterLocation.setApiKey(
        "4f72d5a172de996b05aace4eb52bd7cd", "ios ApiKey");

    ///注册定位结果监听
    _locationListener = _locationPlugin
        .onLocationChanged()
        .listen((Map result) {
      setState(() {
        print(result);
        print("-----");
        print(result is Map);
        // _locationResult = result;
        _latitude = result["latitude"].toString();
        _longitude = result["longitude"].toString();
      });
    });
  }

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

    ///移除定位监听
    if (null != _locationListener) {
      _locationListener.cancel();
    }

    ///销毁定位
    if (null != _locationPlugin) {
      _locationPlugin.destroy();
    }
  }

  ///设置定位参数
  void _setLocationOption() {
    if (null != _locationPlugin) {
      AMapLocationOption locationOption = new AMapLocationOption();

      ///是否单次定位
      locationOption.onceLocation = false;

      ///是否需要返回逆地理信息
      locationOption.needAddress = true;

      ///逆地理信息的语言类型
      locationOption.geoLanguage = GeoLanguage.DEFAULT;

      locationOption.desiredLocationAccuracyAuthorizationMode =
          AMapLocationAccuracyAuthorizationMode.ReduceAccuracy;

      locationOption.fullAccuracyPurposeKey = "AMapLocationScene";

      ///设置Android端连续定位的定位间隔
      locationOption.locationInterval = 2000;

      ///设置Android端的定位模式

      ///可选值：

      ///[AMapLocationMode.Battery_Saving]
      ///[AMapLocationMode.Device_Sensors]
      ///[AMapLocationMode.Hight_Accuracy]
      locationOption.locationMode = AMapLocationMode.Hight_Accuracy;

      ///设置iOS端的定位最小更新距离

      locationOption.distanceFilter = -1;

      ///设置iOS端期望的定位精度
      /// 可选值：

      /// [DesiredAccuracy.Best] 最高精度
      /// [DesiredAccuracy.BestForNavigation] 适用于导航场景的高精度 
      /// [DesiredAccuracy.NearestTenMeters] 10米 
      /// [DesiredAccuracy.Kilometer] 1000米
      /// [DesiredAccuracy.ThreeKilometers] 3000米
      locationOption.desiredAccuracy = DesiredAccuracy.Best;

      ///设置iOS端是否允许系统暂停定位
      locationOption.pausesLocationUpdatesAutomatically = false;

      ///将定位参数设置给定位插件
      _locationPlugin.setLocationOption(locationOption);
    }
  }

  ///开始定位
  void _startLocation() {
    if (null != _locationPlugin) {
      ///开始定位之前设置定位参数
      _setLocationOption();
      _locationPlugin.startLocation();
    }
  }

  /// 动态申请定位权限
  void requestPermission() async {
    // 申请权限
    bool hasLocationPermission = await requestLocationPermission();
    if (hasLocationPermission) {
      print("定位权限申请通过");
    } else {
      print("定位权限申请不通过");
    }
  }

  ///  申请定位权限  授予定位权限返回true， 否则返回false
  Future requestLocationPermission() async {
    //获取当前的权限
    var status = await Permission.location.status;
    if (status == PermissionStatus.granted) {
      //已经授权
      return true;
    } else {
      //未授权则发起一次申请
      status = await Permission.location.request();
      if (status == PermissionStatus.granted) {
        return true;
      } else {
        return false;
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("地理定位演示"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            //  latitude: 36.570091461155336, longitude: 109.5080830206976
            //
            Text("纬度:${this._latitude}"),
            Text("经度:${this._longitude}"),
            SizedBox(height: 20),
            ElevatedButton(
              child: Text('开始定位'),
              onPressed: () {
                this._startLocation();
              },
            ),
          ],
        ),
      ),
    );
  }
}