Xamarin.Android:应用未运行时显示通知

// 创建通知渠道
var channelId = "my_channel_id";
var channelName = "My Channel";
var importance = NotificationImportance.Default;
var channel = new NotificationChannel(channelId, channelName, importance);

// 设置通知渠道的描述和其他属性
channel.Description = "My Channel Description";
channel.EnableVibration(true);

// 注册通知渠道
var notificationManager = (NotificationManager)GetSystemService(NotificationService);
notificationManager.CreateNotificationChannel(channel);

// 构建通知内容
var notificationBuilder = new NotificationCompat.Builder(this, channelId)
    .SetSmallIcon(Resource.Drawable.icon)
    .SetContentTitle("My Notification")
    .SetContentText("This is a notification from my app")
    .SetAutoCancel(true);

// 设置通知点击行为
var intent = new Intent(this, typeof(MainActivity));
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
notificationBuilder.SetContentIntent(pendingIntent);

// 发送通知
var notificationId = 1;
notificationManager.Notify(notificationId, notificationBuilder.Build());