reworked background task with android_alarm_manager_plus

README.md

@@ -45,6 +45,7 @@ flutter run
 - [Android Intent Plus](https://pub.dev/packages/android_intent_plus) library for alarm
 - removed ~~[Flutter Alarm Clock](https://pub.dev/packages/flutter_alarm_clock) library for making an alarm~~
 - [Twitter Tweets API](https://github.com/Rakibul73/twitter_tweets_api)
-- [WorkManager](https://pub.dev/packages/workmanager) library for making periodic task
+- [Android Alarm Manager Plus](https://pub.dev/packages/android_alarm_manager_plus) library for making background task
+- removed ~~[WorkManager](https://pub.dev/packages/workmanager) library for making background task~~
 - [SharedPreferences](https://pub.dev/packages/shared_preferences) library for persistent storage
 - [Twitter Developer API](https://developer.twitter.com/en/docs)

android/app/src/main/AndroidManifest.xml

@@ -2,8 +2,6 @@
     package="com.spryshanto.cr_alarm">
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
-    <uses-permission android:name="android.permission.VIBRATE"/>
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <!-- For apps with targetSDK=31 (Android 12) -->
     <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>

lib/main.dart

@@ -1,29 +1,20 @@
 import 'dart:io';
 import 'package:intl/intl.dart';
 import 'package:flutter/material.dart';
-import 'package:timezone/data/latest.dart' as tz;
+import 'package:permission_handler/permission_handler.dart';
 import 'dart:convert';
 import 'package:http/http.dart' as http;
 import 'dart:async';
 import 'package:android_intent_plus/android_intent.dart';
 import 'package:android_intent_plus/flag.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'package:workmanager/workmanager.dart';
+import 'package:android_alarm_manager_plus/android_alarm_manager_plus.dart';
 import 'package:platform/platform.dart';
 
 
 const simplePeriodicTask = "simplePeriodicTask";
 const latestTimestampKey = "latestTimestamp";
 
-@pragma('vm:entry-point') // Mandatory if the App is obfuscated or using Flutter 3.1+
-void callbackDispatcher() {
-  Workmanager().executeTask((task, inputData) async {
-    await _createAlarm();
-    // Return true when the task is completed successfully
-    return Future.value(true);
-  });
-}
-
 class PostHttpOverrides extends HttpOverrides{
   @override
   HttpClient createHttpClient(context){
@@ -32,6 +23,7 @@ class PostHttpOverrides extends HttpOverrides{
   }
 }
 
+@pragma('vm:entry-point') // Mandatory if the App is obfuscated or using Flutter 3.1+
 Future<void> _createAlarm() async {
   // Retrieve the latest timestamp from shared preferences
   final prefs = await SharedPreferences.getInstance();
@@ -41,7 +33,6 @@ Future<void> _createAlarm() async {
   if (response.statusCode == 200) {
     final Map<String, dynamic> data =  json.decode(response.body);
     final String timestamp = data['timestamp'];
-    const int timeZoneDifferenceInHours = 6;
     // Checking if the timestamp has changed or not
     if (timestamp != latestTimestamp) {
       // saving the latest timestamp to shared preferences for next time
@@ -66,15 +57,12 @@ Future<void> _createAlarm() async {
             'android.intent.extra.alarm.MESSAGE': 'CR Posted',
           },
         );
-        intent.launch();
+        await intent.launch();
       } 
       catch (e) {
-        print('Error creating alarm: callbackDispatcher= $e');
+        throw Exception('Error creating alarm: $e');
       }
     }
-    else {
-      print("\ntimestamp === latestTimestamp\n");
-    }
   } 
   else {
     throw Exception('Failed to load data from API');
@@ -84,15 +72,19 @@ Future<void> _createAlarm() async {
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
   HttpOverrides.global = new PostHttpOverrides();
-  Workmanager().initialize(callbackDispatcher);
-  // Registering periodic task for every 15 minutes
-  Workmanager().registerPeriodicTask(simplePeriodicTask , simplePeriodicTask,
-        frequency: const Duration(minutes: 15));
+  await AndroidAlarmManager.initialize();
+  await AndroidAlarmManager.periodic(const Duration(minutes: 5), 4, _createAlarm,
+      exact: true,
+      wakeup: true,
+      allowWhileIdle: true,
+      rescheduleOnReboot: true);
 
   runApp(MyApp());
 }
 
 class MyApp extends StatefulWidget {
+  const MyApp({super.key});
+
   @override
   _MyAppState createState() => _MyAppState();
 }
@@ -101,6 +93,14 @@ class _MyAppState extends State<MyApp> {
   @override
   void initState() {
     super.initState();
+    requestPermissions();
+  }
+
+  Future<void> requestPermissions() async {
+    PermissionStatus status = await Permission.ignoreBatteryOptimizations.status;
+    if (!status.isGranted) {
+      status = await Permission.ignoreBatteryOptimizations.request();
+    }
   }
 
   @override

pubspec.lock

@@ -1,14 +1,22 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  android_alarm_manager_plus:
+    dependency: "direct main"
+    description:
+      name: android_alarm_manager_plus
+      sha256: "8160e431426c9419d91e3e72c45e2d67be9cfbdbaa942bfd43d58ade04cb1632"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
   android_intent_plus:
     dependency: "direct main"
     description:
       name: android_intent_plus
-      sha256: "6bcdcd20461ac7a0c785f6298cdda96ad275d5bcbc1ecf28829cbe03ec6690be"
+      sha256: "28a665a6cd505a03ba480d78a36a1959c24de0c32083dd1e82766c99299cfca3"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.7"
+    version: "3.1.8"
   archive:
     dependency: transitive
     description:
@@ -272,6 +280,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.5"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      sha256: "33c6a1253d1f95fd06fa74b65b7ba907ae9811f9d5c1d3150e51417d04b8d6a8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.0"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: "8028362b40c4a45298f1cbfccd227c8dd6caf0e27088a69f2ba2ab15464159e2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.0"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: ee96ac32f5a8e6f80756e25b25b9f8e535816c8e6665a96b6d70681f8c4f7e85
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.0.8"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: "68abbc472002b5e6dfce47fe9898c6b7d8328d58b5d2524f75e277c07a97eb84"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.9.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: f67cab14b4328574938ecea2db3475dad7af7ead6afab6338772c5f88963e38b
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
   petitparser:
     dependency: transitive
     description:
@@ -453,14 +501,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.4"
-  workmanager:
-    dependency: "direct main"
-    description:
-      name: workmanager
-      sha256: e0be7e35d644643f164ee45d2ce14414f0e0fdde19456aa66065f35a0b1d2ea1
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.5.1"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.1.0+1
+version: 1.2.0+1
 
 environment:
   sdk: '>=2.19.6 <3.0.0'
@@ -39,9 +39,11 @@ dependencies:
   intl: ^0.17.0
   http: ^0.13.3
   # flutter_alarm_clock: ^0.0.2
-  android_intent_plus: ^3.1.7
-  workmanager: ^0.5.1
+  android_intent_plus: ^3.1.8
+  # workmanager: ^0.5.1
   shared_preferences: ^2.1.0
+  permission_handler: ^10.2.0
+  android_alarm_manager_plus: ^2.1.3
 
 dev_dependencies:
   flutter_test:

windows/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,9 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <permission_handler_windows/permission_handler_windows_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  PermissionHandlerWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  permission_handler_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST