![]() ![]() Manager.Notify(messageId++, notification) Notification notification = builder.Build() ![]() SetDefaults((int)NotificationDefaults.Sound | (int)NotificationDefaults.Vibrate) SetLargeIcon(BitmapFactory.DecodeResource(, )) NotificationCompat.Builder builder = new NotificationCompat.Builder(AndroidApp.Context, channelId) PendingIntent pendingIntent = PendingIntent.GetActivity(AndroidApp.Context, pendingIntentId++, intent, PendingIntentFlags.UpdateCurrent) Intent intent = new Intent(AndroidApp.Context, typeof(MainActivity)) Public void Show(string title, string message) NotificationReceived?.Invoke(null, args) Public void ReceiveNotification(string title, string message) Long triggerTime = GetNotifyTime(notifyTime.Value) ĪlarmManager alarmManager = (Context.AlarmService) as AlarmManager ĪlarmManager.Set(AlarmType.RtcWakeup, triggerTime, pendingIntent) PendingIntent pendingIntent = PendingIntent.GetBroadcast(AndroidApp.Context, pendingIntentId++, intent, PendingIntentFlags.CancelCurrent) Intent intent = new Intent(AndroidApp.Context, typeof(AlarmHandler)) Public void SendNotification(string title, string message, DateTime? notifyTime = null) ![]() Public AndroidNotificationManager() => Initialize() Void OnSendClick(object sender, EventArgs e) ShowNotification(evtData.Title, evtData.Message) Var evtData = (NotificationEventArgs)eventArgs NotificationManager.NotificationReceived += (sender, eventArgs) => NotificationManager = DependencyService.Get() INotificationManager notificationManager The MainPage class code-behind handles the sending and receiving of notifications: public partial class MainPage : ContentPage The layout contains Label elements that explain instructions, and Button elements that send or schedule a notification when tapped. The sample application contains a ContentPage called MainPage.xaml with the following content: Once an interface has been created, it can be consumed in the shared Xamarin.Forms project even though platform implementations haven't been created yet. The ReceiveNotification method should be called by the underlying platform when a message is received. The SendNotification method should send a notification, at an optional DateTime. The Initialize method should perform any native platform logic needed to prepare the notification system. The NotificationReceived event allows the application to handle incoming notifications. This interface will be implemented in each platform project. Void ReceiveNotification(string title, string message) Void SendNotification(string title, string message, DateTime? notifyTime = null) The following INotificationManager interface is implemented in the shared code library, and defines a cross-platform API that the application can use to interact with notifications: public interface INotificationManager The Xamarin.Forms application should create and consume notifications without concern for the underlying platform implementations. This article explains how to create a cross-platform abstraction to send, schedule, and receive local notifications with Xamarin.Forms. Local notifications are often used for features such as:Įach platform handles the creation, display, and consumption of local notifications differently. Local notifications are alerts sent by applications installed on a mobile device. ![]()
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