94 lines
2.5 KiB
Dart
94 lines
2.5 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:amap_flutter_location/amap_flutter_location.dart';
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import 'package:amap_flutter_location/amap_location_option.dart';
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import 'package:autosos_flutter/config/constant.dart';
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import 'package:flutter/foundation.dart';
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/// 定位服务（封装 AMap Flutter Location 3.0）
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class LocationService {
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static final LocationService instance = LocationService._();
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LocationService._();
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final _location = AMapFlutterLocation();
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final _positionController =
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StreamController<Map<String, Object>>.broadcast();
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Stream<Map<String, Object>> get positionStream => _positionController.stream;
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Map<String, Object>? _last;
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Map<String, Object>? get last => _last;
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bool _initialized = false;
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/// 初始化并请求权限
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Future<bool> init({
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String androidKey = '',
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String iosKey = '',
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}) async {
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try {
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if (_initialized) return true;
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AMapFlutterLocation.setApiKey(androidKey, iosKey);
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_location.setLocationOption(AMapLocationOption(
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locationMode: AMapLocationMode.Hight_Accuracy,
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onceLocation: false,
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locationInterval: 5000, // 5 秒
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desiredAccuracy: DesiredAccuracy.Best,
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distanceFilter: -1,
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needAddress: true,
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));
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_location.onLocationChanged().listen((event) {
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_last = event;
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Constant.lat = (event['latitude'] as num?)?.toDouble() ?? 0;
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Constant.lng = (event['longitude'] as num?)?.toDouble() ?? 0;
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Constant.address = (event['address'] as String?) ?? '';
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_positionController.add(event);
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});
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_initialized = true;
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return true;
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} catch (e) {
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debugPrint('LocationService init failed: $e');
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return false;
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}
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}
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/// 开始定位
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void start() {
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_location.startLocation();
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}
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/// 停止定位
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void stop() {
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_location.stopLocation();
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}
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/// 单次定位（用于初始定位、报点等）
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Future<Map<String, Object>?> fetchOnce() async {
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start();
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final completer = Completer<Map<String, Object>?>();
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final sub = positionStream.listen((loc) {
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if (!completer.isCompleted) completer.complete(loc);
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});
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final loc = await completer.future.timeout(
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const Duration(seconds: 10),
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onTimeout: () => null,
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);
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await sub.cancel();
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return loc;
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}
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void dispose() {
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_location.stopLocation();
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_location.destroy();
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_positionController.close();
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}
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/// 平台判断辅助
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static bool get isAndroid => Platform.isAndroid;
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static bool get isIOS => Platform.isIOS;
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}
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