Feature/prevents int type error (#145)

example/lib/screens/edit_alarm.dart

@@ -69,12 +69,11 @@ class _ExampleAlarmEditScreenState extends State<ExampleAlarmEditScreen> {
       setState(() {
         final DateTime now = DateTime.now();
         selectedDateTime = now.copyWith(
-          hour: res.hour,
-          minute: res.minute,
-          second: 0,
-          millisecond: 0,
-          microsecond: 0
-        );
+            hour: res.hour,
+            minute: res.minute,
+            second: 0,
+            millisecond: 0,
+            microsecond: 0);
         if (selectedDateTime.isBefore(now)) {
           selectedDateTime = selectedDateTime.add(const Duration(days: 1));
         }
@@ -83,10 +82,16 @@ class _ExampleAlarmEditScreenState extends State<ExampleAlarmEditScreen> {
   }
 
   AlarmSettings buildAlarmSettings() {
+    //[DO] id must be less than Android's max int value
     final id = creating
         ? DateTime.now().millisecondsSinceEpoch % 10000
         : widget.alarmSettings!.id;
 
+    // [DON'T] id must be less than Android's max int value
+    // final id = creating
+    //     ? DateTime.now().millisecondsSinceEpoch
+    //     : widget.alarmSettings!.id;
+
     final alarmSettings = AlarmSettings(
       id: id,
       dateTime: selectedDateTime,

lib/model/alarm_settings.dart

@@ -90,7 +90,9 @@ class AlarmSettings {
     required this.notificationBody,
     this.enableNotificationOnKill = true,
     this.androidFullScreenIntent = true,
-  });
+  })  : assert(id != 0 && id != -1, "id cannot be set to 0 or -1"),
+        assert(id <= 2147483647,
+            "id cannot be set larger then Android Int.MAX_VALUE");
 
   /// Constructs an `AlarmSettings` instance from the given JSON data.
   factory AlarmSettings.fromJson(Map<String, dynamic> json) => AlarmSettings(