Flutter 后台服务未按预期运行

Question

我有一个

flutter

，它是使用

flutterflow

应用程序构建的，该应用程序正在尝试在其中运行后台服务..此服务应该每3分钟运行一个功能..

这是我当前的代码：

// Automatic FlutterFlow imports
import '/backend/schema/structs/index.dart';
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/actions/index.dart'; // Imports other custom actions
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom action code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!

import 'dart:io'; // For platform-specific checks
import 'package:flutter_background_service/flutter_background_service.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

late Function doableAction;

Future mainAction(Future Function() theAction) async {
  doableAction = theAction;
  await initializeService();
}

Future<void> initializeService() async {
  if (Platform.isAndroid) {
    const AndroidNotificationChannel channel = AndroidNotificationChannel(
      'your_notification_channel_id', // id
      'Your Notification Channel', // title
      importance: Importance.high,
    );

    final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
        FlutterLocalNotificationsPlugin();

    await flutterLocalNotificationsPlugin
        .resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin>()
        ?.createNotificationChannel(channel);
  }

  final service = FlutterBackgroundService();

  // Configure and start the service
  await service.configure(
    androidConfiguration: AndroidConfiguration(
      onStart: onStart,
      autoStart: true,
      isForegroundMode: true, // Ensure it runs as a foreground service
      notificationChannelId: 'your_notification_channel_id',
      initialNotificationTitle: 'Azan Notify',
      initialNotificationContent: 'Azan notify is running in background',
    ),
    iosConfiguration: IosConfiguration(
      onForeground: onStart,
      autoStart: true,
    ),
  );

  // Start the service
  service.startService();

  // Execute the custom action once after service initialization
  await doTheAction();
}

// This function will run the background task
Future<void> onStart(ServiceInstance service) async {
  if (service is AndroidServiceInstance) {
    service.on('setAsForeground').listen((event) {
      service.setAsForegroundService();
    });

    service.on('setAsBackground').listen((event) {
      service.setAsBackgroundService();
    });

    service.on('onTaskRemoved').listen((event) {
      service.stopSelf();
    });
  }

  // Run the action repeatedly in a loop
  while (true) {
    // Removed the `isRunning` check
    print('Running doTheAction in background...');
    await doTheAction();

    // Wait for 3 minutes before repeating the action
    await Future.delayed(Duration(minutes: 3));
  }
}

Future<void> doTheAction() async {
  try {
    print('Executing doableAction...');
    await doableAction(); // Ensure this is an async function
  } catch (e) {
    print('Error in doTheAction: $e');
  }
}

我的操作

doableAction

正在播放应用程序资产中的音频文件..结果如下：

1-当打开应用程序并到达我调用

mainActoin

函数的页面时..音频文件按预期播放..并且即使我将应用程序保留在前台也不会再次运行。

2-当我将应用程序置于后台时..我看到通知..但音频文件再也不会播放..

Answer 1

1.为两个平台（Android & iOS）分配权限，

AndroidManifest.xml

     <manifest xmlns:android="http://schemas.android.com/apk/res/android">    
        <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
            <uses-permission android:name="android.permission.WAKE_LOCK"/>
            <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
        
         <application>
             <service android:name="com.example.projectName"
               android:permission="android.permission.BIND_JOB_SERVICE"
                android:foregroundServiceType="dataSync"
                android:exported="false">
    <intent-filter>
          <action android:name="android.intent.action.MAIN"/>
    </intent-filter>
    </service>
    <meta-data 
          android:name="flutterEmbedding"
          android:value="2"/>
     </application>
 </manifest>  

android:foregroundServiceType="dataSync" 中出现任何错误，只需将其替换为

android:foregroundServiceType="location"

info.plist

<array>
        <string>fetch</string>
        <string>processing</string>
        <string>location</string>
</array>

您剩余的代码