Flutter地理位置获取插件flutter_tamap_location的使用

简介

flutter_tamap_location 是一个用于获取地理位置信息的 Flutter 插件。它支持 Android 和 iOS 平台，并且可以获取高精度的地理位置数据。

使用步骤

1. 添加依赖

在 pubspec.yaml 文件中添加以下依赖：

dependencies:
  flutter_tamap_location: ^1.0.0
  permission_handler: ^10.0.0

然后运行 flutter pub get 安装依赖。

2. 初始化插件

在 main.dart 中初始化插件并设置必要的配置。

import 'package:flutter/material.dart';
import 'package:flutter_tamap_location/amap_location_option.dart';
import 'dart:async';
import 'dart:io';
import 'package:permission_handler/permission_handler.dart';
import 'package:flutter_tamap_location/flutter_amap_location.dart';

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

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

  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Map<String, Object>? _locationResult;

  StreamSubscription<Map<String, Object>>? _locationListener;

  final FlutterAmapLocation _locationPlugin = FlutterAmapLocation(pluginKey: "background");

  [@override](/user/override)
  void initState() {
    super.initState();

    // 设置高德隐私政策是否已展示
    FlutterAmapLocation.updatePrivacyShow(true, true);

    // 设置是否已获得用户同意
    FlutterAmapLocation.updatePrivacyAgree(true);

    // 动态申请定位权限
    requestPermission();

    // 设置高德地图的 apiKey（Android 和 iOS）
    FlutterAmapLocation.setApiKey("your_android_api_key", "your_ios_api_key");

    // iOS 获取精度类型
    if (Platform.isIOS) {
      requestAccuracyAuthorization();
    }

    // 注册定位结果监听
    _locationListener = _locationPlugin.onLocationChanged().listen((Map<String, Object> result) {
      setState(() {
        _locationResult = result;
      });
    });
  }

  [@override](/user/override)
  void dispose() {
    super.dispose();

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

    // 销毁定位插件
    _locationPlugin.destroy();
  }

  // 设置定位参数
  void _setLocationOption() {
    AMapLocationOption locationOption = AMapLocationOption();

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

    // 是否需要逆地理信息
    locationOption.needAddress = true;

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

    // 设置定位模式
    locationOption.locationMode = AMapLocationMode.Hight_Accuracy;

    // 设置定位间隔
    locationOption.locationInterval = 2000;

    // 设置 iOS 的最小更新距离
    locationOption.distanceFilter = -1;

    // 设置 iOS 的期望定位精度
    locationOption.desiredAccuracy = DesiredAccuracy.Best;

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

  // 开始定位
  void _startLocation() {
    _setLocationOption(); // 设置定位参数
    FlutterAmapLocation.startBackgroundLocation();
  }

  // 停止定位
  void _stopLocation() {
    FlutterAmapLocation.stopBackgroundLocation();
  }

  // 请求定位权限
  void requestPermission() async {
    bool hasPermission = await requestLocationPermission();
    if (hasPermission) {
      print("定位权限申请通过");
    } else {
      print("定位权限申请不通过");
    }
  }

  // 请求定位权限的具体实现
  Future<bool> requestLocationPermission() async {
    var status = await Permission.location.status;
    if (status == PermissionStatus.granted) {
      return true;
    } else {
      status = await Permission.location.request();
      return status == PermissionStatus.granted;
    }
  }

  // 获取 iOS 的精度类型
  void requestAccuracyAuthorization() async {
    AMapAccuracyAuthorization accuracy = await _locationPlugin.getSystemAccuracyAuthorization();
    if (accuracy == AMapAccuracyAuthorization.AMapAccuracyAuthorizationFullAccuracy) {
      print("精确定位类型");
    } else if (accuracy == AMapAccuracyAuthorization.AMapAccuracyAuthorizationReducedAccuracy) {
      print("模糊定位类型");
    } else {
      print("未知定位类型");
    }
  }

  // 创建按钮容器
  Container _createButtonContainer() {
    return Container(
      alignment: Alignment.center,
      child: Row(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          ElevatedButton(
            onPressed: _startLocation,
            child: const Text('开始定位'),
            style: ButtonStyle(
              backgroundColor: MaterialStateProperty.all(Colors.blue),
              foregroundColor: MaterialStateProperty.all(Colors.white),
            ),
          ),
          SizedBox(width: 20),
          ElevatedButton(
            onPressed: _stopLocation,
            child: const Text('停止定位'),
            style: ButtonStyle(
              backgroundColor: MaterialStateProperty.all(Colors.blue),
              foregroundColor: MaterialStateProperty.all(Colors.white),
            ),
          ),
        ],
      ),
    );
  }

  // 显示定位结果
  Widget _resultWidget(key, value) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: CrossAxisAlignment.center,
      children: [
        Container(
          alignment: Alignment.centerRight,
          width: 100,
          child: Text('$key :'),
        ),
        SizedBox(width: 5),
        Flexible(child: Text('$value', softWrap: true)),
      ],
    );
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    List<Widget> widgets = [];
    widgets.add(_createButtonContainer());

    if (_locationResult != null) {
      _locationResult?.forEach((key, value) {
        widgets.add(_resultWidget(key, value));
      });
    }

    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('AMap Location Plugin Example'),
        ),
        body: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisSize: MainAxisSize.min,
          children: widgets,
        ),
      ),
    );
  }
}