72 lines
2.2 KiB
Dart
72 lines
2.2 KiB
Dart
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import 'package:geolocator/geolocator.dart';
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class LocationResult {
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final String latitude;
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final String longitude;
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LocationResult({
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required this.latitude,
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required this.longitude,
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});
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factory LocationResult.fromPosition(Position p) {
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return LocationResult(
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latitude: p.latitude.toString(),
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longitude: p.longitude.toString(),
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);
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}
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double? get latitudeAsDouble => double.tryParse(latitude);
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double? get longitudeAsDouble => double.tryParse(longitude);
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@override
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String toString() => 'LocationResult(latitude: $latitude, longitude: $longitude)';
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}
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class LocationException implements Exception {
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final String message;
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LocationException(this.message);
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@override
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String toString() => message;
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}
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/// 统一处理定位权限与获取经纬度（字符串形式）
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class LocationService {
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/// 获取当前经纬度（字符串形式），成功返回 LocationResult，失败抛出 LocationException
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static Future<LocationResult> getCurrentLocation({
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Duration timeout = const Duration(seconds: 10),
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}) async {
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// 检查定位服务是否开启
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bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
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if (!serviceEnabled) {
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await Geolocator.openLocationSettings();
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throw LocationException('定位服务未开启，请打开设备定位后重试');
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}
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// 检查/请求权限
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LocationPermission permission = await Geolocator.checkPermission();
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if (permission == LocationPermission.denied) {
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permission = await Geolocator.requestPermission();
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if (permission == LocationPermission.denied) {
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throw LocationException('定位权限被拒绝');
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}
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}
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if (permission == LocationPermission.deniedForever) {
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throw LocationException(
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'定位权限被永久拒绝，请去系统设置中为应用打开定位权限',
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);
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}
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// 获取位置（带超时）
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try {
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final position = await Geolocator
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.getCurrentPosition(desiredAccuracy: LocationAccuracy.high)
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.timeout(timeout);
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return LocationResult.fromPosition(position);
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} on Exception catch (e) {
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throw LocationException('获取位置失败: ${e.toString()}');
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}
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}
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}
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