main, use global variables for now to decide between notifications and alarms on Android, may become a setting later.

lib/main.dart

@@ -6,6 +6,7 @@ import 'package:geolocator/geolocator.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:timezone/data/latest_all.dart' as tz;
+import 'package:timezone/timezone.dart' as tz;
 import 'package:http/http.dart' as http;
 import 'package:alarm/alarm.dart';
 
@@ -25,6 +26,9 @@ void main() async {
   runApp(const SunsetAlarmApp());
 }
 
+const ANDROID_USE_NOTIF = false;
+const ANDROID_USE_ALARM = !ANDROID_USE_NOTIF;
+
 class SunsetAlarmApp extends StatelessWidget {
   const SunsetAlarmApp({super.key});
 
@@ -251,52 +255,58 @@ class _HomeScreenState extends State<HomeScreen> {
         'Alarm Enabled @ ${alarmTime.hour.toString().padLeft(2, '0')}:${alarmTime.minute.toString().padLeft(2, '0')} (App Must Stay Open!)',
       );
     } else if (Platform.isAndroid) {
-      /*** Notifcation Method - Works *** /
-      // Android: use zonedSchedule (works in background)
-      final tzAlarm = tz.TZDateTime.from(alarmTime, tz.local);
-      const androidDetails = AndroidNotificationDetails(
-        'sunset_alarm',
-        'Sunset Alarm',
-        channelDescription: 'Alarm X minutes before sunset',
-        importance: Importance.max,
-        priority: Priority.high,
-        fullScreenIntent: true,
-        category: AndroidNotificationCategory.alarm,
-      );
-      await _notifications.zonedSchedule(
-        id: _alarmId,
-        title: 'Sunset in ${_minutesBefore} min',
-        body: 'The sun sets at $sunsetText. Time to get ready!',
-        scheduledDate: tzAlarm,
-        notificationDetails: const NotificationDetails(android: androidDetails),
-        androidScheduleMode: AndroidScheduleMode.alarmClock,
-      );
-      _showSnack('Alarm scheduled!');
-      debugPrint('DEBUG: Alarm time:   ${tzAlarm.toString()}');
-      debugPrint('DEBUG: Current time: ${DateTime.now().toUtc().toString()}');
-      debugPrint('DEBUG: ${_notifications.toString()}');
+      /*** Notifcation Method - Works ***/
+      if (ANDROID_USE_NOTIF) {
+        // Android: use zonedSchedule (works in background)
+        final tzAlarm = tz.TZDateTime.from(alarmTime, tz.local);
+        const androidDetails = AndroidNotificationDetails(
+          'sunset_alarm',
+          'Sunset Alarm',
+          channelDescription: 'Alarm X minutes before sunset',
+          importance: Importance.max,
+          priority: Priority.high,
+          fullScreenIntent: true,
+          category: AndroidNotificationCategory.alarm,
+        );
+        await _notifications.zonedSchedule(
+          id: _alarmId,
+          title: 'Sunset in ${_minutesBefore} min',
+          body: 'The sun sets at $sunsetText. Time to get ready!',
+          scheduledDate: tzAlarm,
+          notificationDetails: const NotificationDetails(
+            android: androidDetails,
+          ),
+          androidScheduleMode: AndroidScheduleMode.alarmClock,
+        );
+        _showSnack('Alarm scheduled!');
+        debugPrint('DEBUG: Alarm time:   ${tzAlarm.toString()}');
+        debugPrint('DEBUG: Current time: ${DateTime.now().toUtc().toString()}');
+        debugPrint('DEBUG: ${_notifications.toString()}');
+      }
       // End Notification Method ***/
 
       /*** Alarm Method - WIP ***/
-      // Schedule:
-      final settings = AlarmSettings(
-        id: _alarmId,
-        dateTime: alarmTime,
-        //assetAudioPath: 'assets/alarm.mp3', // use default rather than custom
-        loopAudio: true, // keeps ringing until dismissed
-        vibrate: true,
-        androidFullScreenIntent: true, // wakes screen like clock app
-        volumeSettings: VolumeSettings.fade(
-          //volume: 0.8, // use default rather than custom
-          fadeDuration: Duration(seconds: 60),
-        ),
-        notificationSettings: NotificationSettings(
-          title: 'Sunset Alarm',
-          body: 'Sun is setting in ${_minutesBefore} minute(s)!',
-          stopButton: 'Dismiss',
-        ),
-      );
-      await Alarm.set(alarmSettings: settings);
+      if (ANDROID_USE_ALARM) {
+        // Schedule:
+        final settings = AlarmSettings(
+          id: _alarmId,
+          dateTime: alarmTime,
+          //assetAudioPath: 'assets/alarm.mp3', // use default rather than custom
+          loopAudio: true, // keeps ringing until dismissed
+          vibrate: true,
+          androidFullScreenIntent: true, // wakes screen like clock app
+          volumeSettings: VolumeSettings.fade(
+            //volume: 0.8, // use default rather than custom
+            fadeDuration: Duration(seconds: 60),
+          ),
+          notificationSettings: NotificationSettings(
+            title: 'Sunset Alarm',
+            body: 'Sun is setting in ${_minutesBefore} minute(s)!',
+            stopButton: 'Dismiss',
+          ),
+        );
+        await Alarm.set(alarmSettings: settings);
+      }
       // End Alarm Method ***/
       _showSnack('Alarm Scheduled @ ${alarmTime}');
     } else {
@@ -313,10 +323,10 @@ class _HomeScreenState extends State<HomeScreen> {
       _alarmTimer?.cancel();
       if (!Platform.isLinux) {
         // Notification Method
-        //await _notifications.cancel(id: _alarmId);
+        if (ANDROID_USE_NOTIF) await _notifications.cancel(id: _alarmId);
 
         // Alarm Method
-        await Alarm.stop(_alarmId);
+        if (ANDROID_USE_ALARM) await Alarm.stop(_alarmId);
       }
       _showSnack('Alarm Cancelled');
     }