Added a lot

lib/notifications.dart

@@ -0,0 +1,27 @@
+import 'dart:math';
+
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+
+final _localNotificationsPlugin = FlutterLocalNotificationsPlugin();
+final r = Random(4);
+
+Future<void> setup() async {
+  const androidSetting = AndroidInitializationSettings('@mipmap/ic_launcher');
+  const initSettings = InitializationSettings(android: androidSetting);
+  await _localNotificationsPlugin.initialize(initSettings).then((value) => {});
+}
+
+Future<void> addNotification(title, body) async {
+  const androidDetail =
+      AndroidNotificationDetails("0", "Notifications", groupKey: "Key");
+
+  final id = r.nextInt(100000);
+  final noticeDetail = const NotificationDetails(android: androidDetail);
+
+  await _localNotificationsPlugin.show(
+    id,
+    title,
+    body,
+    noticeDetail,
+  );
+}