当请求不是来自Firebase控制台时，RemoteMessage.GetNotification()返回null? [英] RemoteMessage.GetNotification() returns null when request is not from Firebase Console?

问题描述

我正在测试Firebase Cloud Messaging.

I am testing Firebase Cloud Messaging.

如果我使用Firebase控制台发送消息-在我的代码中，我设置了值的Notification对象-没问题:

If I use a Firebase Console to send a message - in my code I Notification object with values set - not a problem:

public override void OnMessageReceived(RemoteMessage message)
    {
        base.OnMessageReceived(message);

        Firebase.Messaging.RemoteMessage.Notification oNotification;

        oNotification = message.GetNotification();

我正在使用 http://requestmaker.com/发送通知-一切正常-它得到发送，我取回messageID.

I am using http://requestmaker.com/ to send a notification - and all works fine - it gets sent and I get back the messageID.

POST /fcm/send HTTP/1.1
Host: fcm.googleapis.com
Accept: */*
Authorization: key=not-a-real-key0omClYhniZaIAercMVzeFHEG508USi8lud9pxC-SzxAAbR2mflAfVNsfrbrsPJxoFYTr15ytRn9aqWSQXm5x00AOwu2Wl6mWwTcm9l6G
Content-Length: 188
Content-Type: application/x-www-form-urlencoded

但是oNotification = message.GetNotification();返回null. 问题是-为什么?

But the oNotification = message.GetNotification(); returns null. The questions is - why?

推荐答案

似乎您正在发送 FCM消息类型.

It seems that you were sending a data payload instead of a notification payload. When using the Firebase Console, the message sent is always treated as a notification payload message (or a combination of both if you added custom key-value pairs in the Advance Options). See FCM Message Types.

使用requestmaker时，您可能仅发送仅data个有效负载.在您的代码中，您仅处理具有notification有效负载类型的消息:

It's possible that you were only sending data-only payloads when using the requestmaker. In your code, you're only handling messages with notification payload types:

message.GetNotification();

我对Android Xamarin并不十分熟悉，但是通常对FCM并不陌生，还有一种方法可以通过调用

I'm not fully familiar with Android Xamarin, but usually with FCM, there is also a way to get the data payloads by calling RemoteMessage.getData(), should you decide to send data-only payloads.

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