108 lines
3.2 KiB
Dart
108 lines
3.2 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:autosos_flutter/service/heartbeat_service.dart';
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import 'package:autosos_flutter/service/location_service.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter_background_service/flutter_background_service.dart';
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/// 后台保活服务（对应 Android JjSosLongService）
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///
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/// 启动后会在原生层持有一个前台服务（Foreground Service），
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/// 即使 App 被系统回收，isolate 仍可继续执行心跳与位置上报。
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class BackgroundService {
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static final BackgroundService instance = BackgroundService._();
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BackgroundService._();
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static const String _notificationChannelId = 'autosos_bg_channel';
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static const int _notificationId = 888;
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final _service = FlutterBackgroundService();
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/// 是否正在运行
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Future<bool> isRunning() => _service.isRunning();
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/// 初始化（在 main() 里调用一次）
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Future<void> init() async {
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if (!Platform.isAndroid && !Platform.isIOS) return;
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await _service.configure(
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androidConfiguration: AndroidConfiguration(
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onStart: _onStart,
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isForegroundMode: true,
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autoStart: true,
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autoStartOnBoot: true,
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foregroundServiceNotificationId: _notificationId,
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initialNotificationTitle: '啾啾救援',
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initialNotificationContent: '正在保持在线...',
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notificationChannelId: _notificationChannelId,
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foregroundServiceTypes: const [
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AndroidForegroundType.location,
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AndroidForegroundType.dataSync,
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],
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),
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iosConfiguration: IosConfiguration(
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autoStart: true,
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onForeground: _onStart,
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onBackground: _onIosBackground,
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),
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);
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}
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/// 启动后台服务
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Future<void> start() async {
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final running = await _service.isRunning();
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if (!running) {
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await _service.startService();
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}
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}
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/// 停止后台服务
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Future<void> stop() async {
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_service.invoke('stopService');
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}
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/// Android 入口（独立 isolate）
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@pragma('vm:entry-point')
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static void _onStart(ServiceInstance service) async {
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if (service is AndroidServiceInstance) {
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service.on('setAsForeground').listen((event) {
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service.setAsForegroundService();
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});
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service.on('setAsBackground').listen((event) {
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service.setAsBackgroundService();
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});
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service.on('stopService').listen((event) async {
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await service.stopSelf();
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});
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}
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// 启动位置采集
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try {
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LocationService.instance.init();
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LocationService.instance.start();
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} catch (e) {
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debugPrint('BG location start failed: $e');
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}
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// 启动心跳
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HeartbeatService.instance.start();
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// 持续保活：每 30 秒检查一次
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Timer.periodic(const Duration(seconds: 30), (timer) async {
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if (!HeartbeatService.instance.running) {
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HeartbeatService.instance.start();
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}
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});
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debugPrint('Background service started');
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}
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/// iOS 后台入口（必须尽快返回）
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@pragma('vm:entry-point')
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static bool _onIosBackground(ServiceInstance service) {
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// iOS 不允许常驻后台任务，只能在限时窗口内上报
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return true;
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}
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}
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