Background Services But not working in background( It will not work when you complete remove the app from task manager.). Only Work When you have Pause mode/application was still alive Mode. #3

Is it work for flutter_background_service: ^5.1.0 flutter_local_notifications: ^18.0.1 flutter_background_messenger: ^0.0.2 Background Service in android??. import 'dart:async'; import 'dart:io'; import 'dart:ui'; import 'package:flutter/material.dart'; import 'package:flutter_background_service/flutter_background_service.dart'; import 'package:flutter_local_notifications/flutter_local_notifications.dart'; import 'package:sms_background/bgservice/bg_service.dart'; import '../utils/color.dart'; // Custom colors or just use default // Initialize the background service Future<void> initializeService() async { final service = FlutterBackgroundService(); const AndroidNotificationChannel channel = AndroidNotificationChannel( 'my_foreground', // id 'MY FOREGROUND SERVICE', // title description: 'This channel is used for important notifications.', importance: Importance.low, enableVibration: false, enableLights: true, ledColor: primary, // Customize if needed ); final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin(); if (Platform.isIOS || Platform.isAndroid) { await flutterLocalNotificationsPlugin.initialize( const InitializationSettings( iOS: DarwinInitializationSettings(), android: AndroidInitializationSettings('@mipmap/ic_launcher'), ), ); } await flutterLocalNotificationsPlugin .resolvePlatformSpecificImplementation< AndroidFlutterLocalNotificationsPlugin>() ?.createNotificationChannel(channel); await service.configure( androidConfiguration: AndroidConfiguration( onStart: onStart, autoStart: true, isForegroundMode: true, notificationChannelId: 'my_foreground', initialNotificationTitle: 'Service Running', initialNotificationContent: 'Sending SMS...', foregroundServiceNotificationId: 888, foregroundServiceTypes: [AndroidForegroundType.dataSync], ), iosConfiguration: IosConfiguration( autoStart: true, onForeground: onStart, onBackground: onIosBackground, ), ); } @pragma('vm:entry-point') Future<bool> onIosBackground(ServiceInstance service) async { WidgetsFlutterBinding.ensureInitialized(); DartPluginRegistrant.ensureInitialized(); return true; } @pragma('vm:entry-point') void onStart(ServiceInstance service) async { DartPluginRegistrant.ensureInitialized(); final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin(); if (service is AndroidServiceInstance) { service.on('setAsForeground').listen((event) { service.setAsForegroundService(); }); service.on('setAsBackground').listen((event) { service.setAsBackgroundService(); }); } service.on('stopService').listen((event) { service.stopSelf(); }); // Listen for data from the main isolate service.on('data').listen((event) async { if (event != null && event['recipients'] != null) { String message = event['message']??''; List<String> recipients = List<String>.from(event['recipients']); debugPrint('Received recipients in background service: ${recipients.length}'); //if (recipients.isNotEmpty) { await sendBulkSMSWithProgress(recipients, message, flutterLocalNotificationsPlugin, service); //} } }); } Future<void> sendBulkSMSWithProgress( List<String> recipients, String message, FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin, ServiceInstance service) async { int batchSize = 100; // Send 100 messages at a time int totalSent = 0; int totalFailed = 0; // Show a notification for SMS sending progress flutterLocalNotificationsPlugin.show( 888, 'Sending SMS', 'Sending in progress...', const NotificationDetails( android: AndroidNotificationDetails( 'SMS', 'Data Sync', icon: '@drawable/ic_sms_notify', ongoing: true, ), ), ); MessagingExample mMessagingExample = MessagingExample(); List<String> smsList = ['+91xxxxxxxxxx','+9xxxxxxxxxx','+91xxxxxxxxxx','+91xxxxxxxxxx','+91xxxxxxxxxx']; for(int i=0;i<smsList.length;i++){ bool isSms = await mMessagingExample.sendSMS(smsList[i],message); String title = isSms == true?'Success: ${smsList[i]}':'Failed ${smsList[i]}'; if(isSms){ totalSent += (i+1); }else{ totalFailed += (i+1); } // Update progress notification after each batch flutterLocalNotificationsPlugin.show( 888, title, 'Sent $totalSent messages, failed $totalFailed', const NotificationDetails( android: AndroidNotificationDetails( 'SMS', 'Data Sync', icon: '@drawable/ic_sms_notify', ongoing: true, ), ), ); // Delay between batches to avoid overwhelming the system await Future.delayed(Duration(seconds: 40)); } // Notify user when done flutterLocalNotificationsPlugin.show( 888, 'SMS Sent', 'Successfully sent $totalSent messages!', const NotificationDetails( android: AndroidNotificationDetails( 'SMS', 'Data Sync', icon: '@drawable/ic_sms_notify', ongoing: false, ), ), ); service.stopSelf(); // Stop the service after the task is complete } ------------------------------------------------ import 'package:flutter/cupertino.dart'; import 'package:flutter_background_messenger/flutter_background_messenger.dart'; class MessagingExample { final messenger = FlutterBackgroundMessenger(); Future<bool> sendSMS(String mobileNumber,String message) async { try { final success = await messenger.sendSMS( phoneNumber: mobileNumber, message: message, ); if (success) { debugPrint('SMS sent successfully'); return true; } else { debugPrint('Failed to send SMS'); return false; } } catch (e) { debugPrint('Error sending SMS: $e'); return false; } } } Check the above sample