background notifications

lib/main.dart

@@ -1,72 +1,80 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:todoapp/elems/filehandler.dart';
 import 'package:todoapp/pages/Home.dart';
 import 'package:provider/provider.dart';
 import 'package:todoapp/providers/todoprovider.dart';
 import 'package:awesome_notifications/awesome_notifications.dart';
-import 'package:workmanager/workmanager.dart';
 import 'package:disable_battery_optimization/disable_battery_optimization.dart';
+import 'package:flutter_background_service/flutter_background_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 @pragma('vm:entry-point')
-void callbackDispatcher() {
-  Workmanager().executeTask((task, inputData) async {
-    AwesomeNotifications().initialize(
-        null,
-        [
-          NotificationChannel(
-              channelKey: "reminder_channel",
-              channelName: "Reminders",
-              channelDescription: "Reminder for ToDo")
-        ]);
-
-    Map content = await FileHandler.fileContent;
-    for (String key in content.keys) {
-      Map list = content[key];
-      for (String title in list.keys) {
-        Map current = list[title];
-        DateTime dueTime = DateTime.parse(current["dueTime"]);
-        bool checked = current["checked"];
-        DateTime currentTime = DateTime.now();
-        int timeDiff = dueTime
-            .difference(currentTime)
-            .inMinutes;
-        if (timeDiff <= 30 && timeDiff >= 0 && !checked) {
-          AwesomeNotifications().createNotification(
-              content: NotificationContent(
-                  id: 10,
-                  channelKey: "reminder_channel",
-                  title: "Task due!",
-                  body: "Task $title due in $timeDiff minutes!"
-              )
-          );
-        }
+void callbackDispatcher() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  SharedPreferences.getInstance();
+  print("test1");
+  Map content = await FileHandler.fileContent;
+  for (String key in content.keys) {
+    Map list = content[key];
+    for (String title in list.keys) {
+      print("test2");
+      Map current = list[title];
+      DateTime dueTime = DateTime.parse(current["dueTime"]);
+      bool checked = current["checked"];
+      DateTime currentTime = DateTime.now();
+      int timeDiff = dueTime
+          .difference(currentTime)
+          .inMinutes;
+      if (timeDiff <= 30 && timeDiff >= 0 && !checked) {
+        AwesomeNotifications().createNotification(
+            content: NotificationContent(
+                id: 10,
+                channelKey: "reminder_channel",
+                title: "Task due!",
+                body: "Task $title due in $timeDiff minutes!"));
       }
     }
-    return Future.value(true);
+  }
+}
+
+@pragma('vm:entry-point')
+void onStart(ServiceInstance service) {
+  Timer.periodic(const Duration(seconds: 10), (timer) {
+    callbackDispatcher();
   });
 }
 
+Future<void> initService() async {
+  final service = FlutterBackgroundService();
 
-void main() async {
-
-
-  AwesomeNotifications().initialize(
-      null,
-      [
-        NotificationChannel(
-            channelKey: "reminder_channel",
-            channelName: "Reminders",
-            channelDescription: "Reminder for ToDo")
-      ]);
-
-  Workmanager().initialize(
-      callbackDispatcher,
-      isInDebugMode: true
+  await service.configure(
+      iosConfiguration: IosConfiguration(),
+      androidConfiguration: AndroidConfiguration(
+          onStart: onStart,
+          isForegroundMode: false,
+          autoStart: true,
+          autoStartOnBoot: true
+      )
   );
 
-  Workmanager().registerPeriodicTask("check_nots", "nots_check", frequency: Duration(minutes: 15));
-  // Workmanager().registerOneOffTask("test", "test1");
+  service.startService();
+}
 
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await AwesomeNotifications().initialize(null, [
+    NotificationChannel(
+      channelKey: "reminder_channel",
+      channelName: "Reminders",
+      channelDescription: "Reminder for ToDo",
+      importance: NotificationImportance.High,
+    )
+  ]);
+
+  await initService();
   runApp(const MyApp());
 }
 

lib/pages/Home.dart

@@ -6,7 +6,6 @@ import 'package:todoapp/modules/drawer.dart';
 import 'package:provider/provider.dart';
 import 'package:todoapp/providers/todoprovider.dart';
 import 'package:awesome_notifications/awesome_notifications.dart';
-import 'package:workmanager/workmanager.dart';
 import 'package:disable_battery_optimization/disable_battery_optimization.dart';
 
 
@@ -19,12 +18,12 @@ class Home extends StatefulWidget {
 
 class _HomeState extends State<Home> {
   void getPermissions() async {
-    await DisableBatteryOptimization.showEnableAutoStartSettings("Enable Auto Start", "Follow the steps and enable the auto start of this app");
-    await DisableBatteryOptimization.showDisableBatteryOptimizationSettings();
-
-    AwesomeNotifications().isNotificationAllowed().then((isAllowed) {
+    await AwesomeNotifications().isNotificationAllowed().then((isAllowed) {
       AwesomeNotifications().requestPermissionToSendNotifications();
     });
+
+    await DisableBatteryOptimization.showEnableAutoStartSettings("Enable Auto Start", "Follow the steps and enable the auto start of this app");
+    await DisableBatteryOptimization.showDisableBatteryOptimizationSettings();
   }
 
   @override