Fix failed schedule notifications (issue #79)

android/app/src/main/AndroidManifest.xml

@@ -40,9 +40,22 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+
+        <receiver android:exported="false" android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver" />
+        <receiver android:exported="false" android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED"/>
+                <action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
+                <action android:name="android.intent.action.QUICKBOOT_POWERON" />
+                <action android:name="com.htc.intent.action.QUICKBOOT_POWERON"/>
+            </intent-filter>
+        </receiver>
+        <receiver android:exported="false" android:name="com.dexterous.flutterlocalnotifications.ActionBroadcastReceiver" />
     </application>
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.USE_EXACT_ALARM" />
 
     <queries>
         <intent>

lib/service/LocalNotificationService.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:flutter_timezone/flutter_timezone.dart';
 import 'package:flutter_translate/flutter_translate.dart';
 import 'package:personaltasklogger/model/Schedule.dart';
 import 'package:timezone/data/latest.dart' as tz;
@@ -118,6 +119,9 @@ class LocalNotificationService {
     InitializationSettings(android: initializationSettingsAndroid);
 
     tz.initializeTimeZones();
+    final String currentTimeZone = await FlutterTimezone.getLocalTimezone();
+    debugPrint("currentTimeZone=$currentTimeZone");
+    tz.setLocalLocation(tz.getLocation(currentTimeZone));
 
     await _flutterLocalNotificationsPlugin.initialize(initializationSettings,
         onDidReceiveNotificationResponse: (NotificationResponse response) async {
@@ -145,33 +149,45 @@ class LocalNotificationService {
 
   Future<void> scheduleNotification(String receiverKey, int id, String title, message, Duration duration, String channelId,
       [Color? color, List<AndroidNotificationAction>? actions, bool withTranslation = true, CustomRepetition? snoozePeriod]) async {
-    final when = tz.TZDateTime.now(tz.local).add(duration);
 
-    if (when.isBefore(DateTime.now())) {
-      debugPrint("Scheduled notification $id in the past, skip ($when)");
+    if (duration.isNegative || duration.inSeconds < 10) {
+      debugPrint(
+          "Scheduled notification $id in the past, skip");
       return;
     }
 
+    final now = DateTime.now().add(duration);
+
+    var zonedTime = tz.TZDateTime.local(now.year, now.month, now.day, now.hour, now.minute, now.second);
+    if (duration.inMinutes >= 1) {
+      // truncate to full minutes if duration greater than one minute
+      zonedTime = zonedTime.subtract(Duration(seconds: zonedTime.second));
+    }
+
     final parameterMap = {
-      'receiverKey' : receiverKey,
-      'id' : id,
-      'title' : title,
-      'message' : message,
-      'channelId' : channelId,
-      'color' : color?.value,
-      'actions' : actions?.map((a) => a.id + "-" + a.showsUserInterface.toString() + "-" + a.title).toList(),
-      'snooze_period_value' : snoozePeriod?.repetitionValue,
-      'snooze_period_unit' : snoozePeriod?.repetitionUnit.index,
+      'receiverKey': receiverKey,
+      'id': id,
+      'title': title,
+      'message': message,
+      'channelId': channelId,
+      'color': color?.value,
+      'actions': actions?.map((a) =>
+      a.id + "-" + a.showsUserInterface.toString() + "-" + a.title).toList(),
+      'snooze_period_value': snoozePeriod?.repetitionValue,
+      'snooze_period_unit': snoozePeriod?.repetitionUnit.index,
     };
     final parametersAsJson = jsonEncode(parameterMap);
 
+    debugPrint("Schedule $id ($zonedTime), duration=${duration} tz=${tz.local}");
+
+
     await _flutterLocalNotificationsPlugin.zonedSchedule(
         id,
         title,
         message,
-        when.subtract(Duration(seconds: when.second)), // trunc seconds
+        zonedTime,
         NotificationDetails(android: _createNotificationDetails(color, channelId, false, actions, withTranslation)),
-        androidAllowWhileIdle: true,
+        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
         uiLocalNotificationDateInterpretation: UILocalNotificationDateInterpretation.absoluteTime,
         payload: receiverKey + "-" + id.toString() + RESCHEDULE_JSON_START_MARKER + parametersAsJson);
   }
@@ -209,6 +225,7 @@ class LocalNotificationService {
     });
   }
 
+
   void _handlePayload(bool isAppLaunch, String payload, String? actionId) {
     debugPrint("_handlePayload=$payload $isAppLaunch");
 

lib/service/PreferenceService.dart

@@ -160,7 +160,7 @@ class PreferenceService implements ITranslatePreferences {
         KeyValueRepository.update(keyValue);
       }
       else {
-        KeyValueRepository.insert(KeyValue(null, key, value));
+        KeyValueRepository.insert(KeyValue(null, key, value.toString()));
       }
     });
 

metadata/en-US/changelogs/10701.txt

@@ -0,0 +1,2 @@
+* Fix Schedule notification bug #79
+* (Upgrade target version and dependencies)

pubspec.lock

@@ -399,6 +399,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_timezone:
+    dependency: "direct main"
+    description:
+      name: flutter_timezone
+      sha256: "0cb5498dedfaac615c779138194052f04524c31d958fab33d378f22b6cc14686"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
   flutter_translate:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -27,6 +27,7 @@ dependencies:
   flutter_localizations:
     sdk: flutter
   flutter_local_notifications: ^17.2.1+2
+  flutter_timezone: ^2.1.0
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2