The Device.LocalNotification object allows you to show a notification to the user either immediately or at a later time.

The difference between this and Push Notification is that with LocalNotification the message is originated by the mobile app, whereas with Push Notification, the server is the one originating a message.

Setting Notification Icons in Android:

Each local notification in Android takes a small and a large icon. You  can set the notification Icons in Android like this in Activity:

 UIRuntime.NotificationSmallIcon = Resource.Drawable.Icon;

UIRuntime.NotificationLargeIcon = BitmapFactory.DecodeResource(ApplicationContext.Resources, Resource.Drawable.Icon);

Showing a message immediately:

await Device.LocalNotification.Show("some title", "some body");

Showing a message for future display:

await Device.LocalNotification.Schedule("some title", "some body", someDateTime);

Canceling a future notification

If you need the ability to cancel a previously scheduled notification, then you can use another overload which takes an ID for the notification. You can then use the Cancel method to achieve that.

var myNotificationId = 123; // Normally this will come from a database.
await Device.LocalNotification.Schedule("some title", "some body", someDateTime, );

Later on if needed:

var notificationToCancel = 123; // Normally this will come from a database.
await Device.LocalNotification.Cancel(notificationToCancel);