通知未在android设备上显示。（Azure通知中心）

我正在尝试向我的android模拟器发送推送通知。发送通知时，它接收通知，但不显示通知

void SendNotification(string messageBody)
    {
        var intent = new Intent(this, typeof(MainActivity));
        intent.AddFlags(ActivityFlags.ClearTop);
        var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                                                                .SetContentTitle("FCM Message")
                                                                .SetSmallIcon(Resource.Drawable.icon)
                                                                .SetContentText(messageBody)
                                                                .SetChannelId("my-chanel")
                                                                .SetAutoCancel(true)
                                                                .SetContentIntent(pendingIntent)
                                                                .SetSound(); 

        var notificationManager = NotificationManager.FromContext(this);

        notificationManager.Notify(0, notificationBuilder.Build());
    }

我用这个代码来显示它

void SendNotification(string messageBody)
    {
        var intent = new Intent(this, typeof(MainActivity));
        intent.AddFlags(ActivityFlags.ClearTop);
        var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                                                                .SetContentTitle("FCM Message")
                                                                .SetSmallIcon(Resource.Drawable.icon)
                                                                .SetContentText(messageBody)
                                                                .SetChannelId("my-chanel")
                                                                .SetAutoCancel(true)
                                                                .SetContentIntent(pendingIntent)
                                                                .SetSound(); 

        var notificationManager = NotificationManager.FromContext(this);

        notificationManager.Notify(0, notificationBuilder.Build());
    }

但是当收到通知时，什么也没有发生，我的设备日志告诉我：

[Mono] Assembly Ref addref ODEON.Android[0xa31db5c0] -> System.Core[0xa1f2f900]: 7
[MyFirebaseMsgService] From: 241571420247
[MyFirebaseMsgService] noti: 
[Mono] DllImport searching in: '__Internal' ('(null)').
[Mono] Searching for 'java_interop_jnienv_call_boolean_method'.
[Mono] Probing 'java_interop_jnienv_call_boolean_method'.
[Mono] Found as 'java_interop_jnienv_call_boolean_method'.
[Mono] Assembly Ref addref Xamarin.Android.Support.Compat[0xa31dca60] -> Java.Interop[0xa1f2f780]: 8
[Notification] Use of stream types is deprecated for operations other than volume control
[Notification] See the documentation of setSound() for what to use instead with android.media.AudioAttributes to qualify your playback use case 

谁能告诉我为什么它不显示。

---

提前谢谢

如果调用发送通知方法，请使用以下代码显示通知：

        var intent = new Intent(this, typeof(MainActivity));
        intent.AddFlags(ActivityFlags.ClearTop);
        var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
        .SetSmallIcon(Resource.Drawable.ic_stat_ic_notification)
        .SetContentTitle("Title")
        .SetContentText(messageBody)
        .SetAutoCancel(true)
        .SetContentIntent(pendingIntent);

    NotificationManagerCompat notificationManager = NotificationManagerCompat.From(this);
    notificationManager.Notify(0, notificationBuilder.Build());

另外，如果您有Android V 8+设备，我相信您会注意到这一点，那么您正在注册MainActivity OnCreate方法中的通知通道

void CreateNotificationChannel()
    {
        if (Build.VERSION.SdkInt < BuildVersionCodes.O)
        {
            // Notification channels are new in API 26 (and not a part of the
            // support library). There is no need to create a notification 
            // channel on older versions of Android.
            return;
        }

        var channel = new NotificationChannel(CHANNEL_ID, "FCM Notifications", NotificationImportance.Default)
                      {
                          Description = "Firebase Cloud Messages appear in this channel"
                      };

        var notificationManager = (NotificationManager) GetSystemService(NotificationService);
        notificationManager.CreateNotificationChannel(channel);
    }

void CreateNotificationChannel（）
{
if（Build.VERSION.SdkInt

上面写着：当前上下文中不存在通道ID，运行在nexus\u galaxy（API 27）模拟器上的im通道ID可以是您想要的任何字符串，只要确保在需要通道ID时使用相同的内容：

内部静态只读字符串通道ID=“my\u notification\u CHANNEL”它可以工作（Y），但现在当我向设备发送通知时，我无法在文本中生成动态内容。例如，如何从PayloadThank设置ContentText，以防您遇到任何问题，请随时回复。