Flutter定位服务插件huawei_location的使用

发布于 1周前 作者 itying888 来自 Flutter

Flutter定位服务插件huawei_location的使用

简介

华为定位服务插件（Huawei Location Kit Flutter Plugin）结合了全球导航卫星系统（GNSS）、Wi-Fi 和基站定位功能，为您的应用构建全球定位能力，允许您为全球用户提供灵活的位置服务。目前，它提供了三种主要功能：融合定位、活动识别和地理围栏。您可以根据需要调用其中一种或多种功能。

  • 融合定位 提供了一组易于使用的API，使您的应用能够基于GNSS、Wi-Fi 和基站位置数据快速获取设备位置。

  • 活动识别 通过加速度传感器、蜂窝网络信息和磁力计来识别用户运动状态，帮助您的应用适应用户行为。

  • 地理围栏 允许您通过API设置感兴趣的区域，当指定的动作（如离开、进入或停留在该区域）发生时，您的应用可以接收通知。

安装

请参阅pub.dev 和 AppGallery Connect 配置。

文档

问题或反馈

如果您在使用HMS样本时遇到任何问题，请尝试以下选项：

  • Stack Overflow 是编程问题的最佳去处。请务必使用标签 <strong>huawei-mobile-services</strong>。
  • GitHub 是这些插件的官方仓库，您可以在那里提交问题或提出建议。
  • 华为开发者论坛 HMS核心模块非常适合提出一般性问题、寻求建议和意见。
  • 华为开发者文档 是所有HMS核心工具的官方文档，您可以在那里找到详细文档。

如果您在我们的样本中发现了错误，请提交一个GitHub 仓库的问题。

许可证

华为定位服务插件遵循Apache 2.0 许可证。

示例代码

/*
 * Copyright 2020-2024. Huawei Technologies Co., Ltd. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:flutter/material.dart';
import 'package:huawei_location_example/screens/convert_coordinate_screen.dart';
import 'package:huawei_location_example/screens/geocoder_screen.dart';
import 'package:huawei_location_example/screens/get_from_location_screen.dart';
import 'package:huawei_location_example/screens/high_precision_location_screen.dart';
import 'package:huawei_location_example/screens/location_utils_screen.dart';

import 'package:huawei_location_example/screens/activity_conversion_screen.dart';
import 'package:huawei_location_example/screens/activity_identification_screen.dart';
import 'package:huawei_location_example/screens/activity_screen.dart';
import 'package:huawei_location_example/screens/add_geofence_screen.dart';
import 'package:huawei_location_example/screens/fusedlocation_screen.dart';
import 'package:huawei_location_example/screens/geofence_screen.dart';
import 'package:huawei_location_example/screens/get_from_location_name_screen.dart';
import 'package:huawei_location_example/screens/home_screen.dart';
import 'package:huawei_location_example/screens/location_enhance_screen.dart';
import 'package:huawei_location_example/screens/location_updates_cb_screen.dart';
import 'package:huawei_location_example/screens/location_updates_ex_cb_screen.dart';
import 'package:huawei_location_example/screens/location_updates_screen.dart';

void main() => runApp(const LocationKitDemoApp());

class LocationKitDemoApp extends StatelessWidget {
  const LocationKitDemoApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: const HomeScreen(),
      routes: <String, Widget Function(BuildContext)>{
        HomeScreen.ROUTE_NAME: (BuildContext context) => const HomeScreen(),
        FusedLocationScreen.ROUTE_NAME: (BuildContext context) =>
            const FusedLocationScreen(),
        ActivityScreen.ROUTE_NAME: (BuildContext context) =>
            const ActivityScreen(),
        GeofenceScreen.ROUTE_NAME: (BuildContext context) =>
            const GeofenceScreen(),
        AddGeofenceScreen.ROUTE_NAME: (BuildContext context) =>
            const AddGeofenceScreen(),
        ActivityIdentificationScreen.ROUTE_NAME: (BuildContext context) =>
            const ActivityIdentificationScreen(),
        ActivityConversionScreen.ROUTE_NAME: (BuildContext context) =>
            const ActivityConversionScreen(),
        LocationUpdatesScreen.ROUTE_NAME: (BuildContext context) =>
            const LocationUpdatesScreen(),
        LocationUpdatesCbScreen.ROUTE_NAME: (BuildContext context) =>
            const LocationUpdatesCbScreen(),
        LocationUpdatesExCbScreen.ROUTE_NAME: (BuildContext context) =>
            const LocationUpdatesExCbScreen(),
        LocationEnhanceScreen.ROUTE_NAME: (BuildContext context) =>
            const LocationEnhanceScreen(),
        HighPrecisionLocationScreen.ROUTE_NAME: (BuildContext context) =>
            const HighPrecisionLocationScreen(),
        GeocoderScreen.ROUTE_NAME: (BuildContext context) =>
            const GeocoderScreen(),
        GetFromLocationScreen.ROUTE_NAME: (BuildContext context) =>
            const GetFromLocationScreen(),
        GetFromLocationNameScreen.ROUTE_NAME: (BuildContext context) =>
            const GetFromLocationNameScreen(),
        LocationUtilsScreen.ROUTE_NAME: (BuildContext context) =>
            const LocationUtilsScreen(),
        ConvertCoordinateScreen.ROUTE_NAME: (BuildContext context) =>
            const ConvertCoordinateScreen(),
      },
    );
  }
}

更多关于Flutter定位服务插件huawei_location的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter定位服务插件huawei_location的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是一个关于如何在Flutter应用中使用huawei_location插件来实现定位服务的示例代码。这个插件是华为提供的，专门用于在华为设备上获取位置信息。

首先，你需要在你的Flutter项目的pubspec.yaml文件中添加huawei_location依赖：

dependencies:
  flutter:
    sdk: flutter
  huawei_location: ^x.y.z  # 请替换为最新版本号

然后运行flutter pub get来安装依赖。

接下来，你需要配置华为定位服务的权限和AGConnect服务。这通常涉及以下几个步骤：

  1. 在AndroidManifest.xml中添加权限：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.yourapp">

    <!-- 其他配置 -->

    <!-- 请求定位权限 -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

    <!-- 其他配置 -->

    <application
        <!-- 其他配置 -->
        >
        <!-- 配置AGConnect服务 -->
        <meta-data
            android:name="com.huawei.hms.client.appid"
            android:value="你的appid"/>
    </application>
</manifest>
  1. 在build.gradle文件中添加AGConnect服务的依赖：

在android/app/build.gradle文件中：

dependencies {
    implementation 'com.huawei.hms:location:x.y.z'  // 请替换为最新版本号
}

在android/build.gradle文件中确保有Google的服务配置（如果适用）：

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://developer.huawei.com/repo/' }
    }
}
  1. 在Flutter代码中使用huawei_location插件：
import 'package:flutter/material.dart';
import 'package:huawei_location/huawei_location.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late LocationService _locationService;
  LocationResult? _locationResult;

  @override
  void initState() {
    super.initState();
    _locationService = LocationService();
    _requestLocationPermissions();
  }

  Future<void> _requestLocationPermissions() async {
    bool hasPermission = await _locationService.checkPermission();
    if (!hasPermission) {
      bool requestPermission = await _locationService.requestPermission();
      if (requestPermission) {
        _getLocation();
      } else {
        // 处理权限请求被拒绝的情况
        print("Location permission denied");
      }
    } else {
      _getLocation();
    }
  }

  Future<void> _getLocation() async {
    try {
      LocationSettings locationSettings = LocationSettings(
        priority: LocationRequest.PRIORITY_HIGH_ACCURACY,
      );

      bool isLocationEnabled = await _locationService.isLocationEnabled();
      if (!isLocationEnabled) {
        // 处理位置服务未启用的情况
        print("Location service is not enabled");
        return;
      }

      LocationCallback locationCallback = LocationCallback(
        onLocationResult: (LocationResult result) {
          setState(() {
            _locationResult = result;
          });
        },
      );

      await _locationService.fuseLocationProviderClient.requestLocationUpdates(
        locationRequest: LocationRequest.fromSettings(locationSettings),
        callback: locationCallback,
        looper: null,  // 使用null表示在主线程回调
      );
    } catch (e) {
      print("Error getting location: $e");
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Huawei Location Service Example'),
        ),
        body: Center(
          child: _locationResult != null
              ? Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Text('Latitude: ${_locationResult!.latitude}'),
                    Text('Longitude: ${_locationResult!.longitude}'),
                  ],
                )
              : CircularProgressIndicator(),
        ),
      ),
    );
  }
}

请注意，上述代码是一个基本的示例，用于展示如何使用huawei_location插件来获取设备的当前位置。在实际应用中，你可能需要处理更多的边缘情况和错误处理，比如位置服务不可用、设备不支持定位等。

此外，由于插件和API可能会随着时间更新，请参考最新的huawei_location插件文档和华为开发者文档，以确保你的代码与最新的API和最佳实践保持一致。

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