应用关闭时未收到fcm通知 [英] Not receive fcm notification when app is closed

问题描述

您好，我正在尝试在Xamarin表单应用中实施FCM. 我安装了 Plugin.FirebasePushNotification 插件

Hello I am trying tyo implement FCM in xamarin forms app. i Installed Plugin.FirebasePushNotification Plugin

我实现了刷新令牌类

[Service]
[IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })]
public class MyFirebaseIIDService : FirebaseInstanceIdService
{
    const string TAG = "MyFirebaseIIDService";
    public override void OnTokenRefresh()
    {
        var refreshedToken = FirebaseInstanceId.Instance.Token;
        Log.Debug(TAG, "Refreshed token: " + refreshedToken);
        SendRegistrationToServer(refreshedToken);
    }
    void SendRegistrationToServer(string token)
    {
        // Add custom implementation, as needed.
    }
}

该类用于接收通知，但在应用关闭时不会接收通知

and this class for receive notification but not get notification when app is close

  [IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
        public class MyFirebaseMessagingService : FirebaseMessagingService
        {
            const string TAG = "MyFirebaseMsgService";

            // [START receive_message]
            public override void OnMessageReceived(RemoteMessage message)
            {
        }
    }

我用了这个有效载荷

{至":"APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx ..."，通知" :{ "body":非常匹配！"， "title":葡萄牙vs.丹麦"}}

{ "to" : "APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx...", "notification" : { "body" : "great match!", "title" : "Portugal vs. Denmark" } }

推荐答案

从Android官方文档中，FirebaseMessaging具有方法subscribeToTopic.

From Android Official document,FirebaseMessaging has method of subscribeToTopic .

public Task subscribeToTopic (String topic)

在后台订阅主题. 订阅操作将保持不变，并将重试直到成功. 这使用Firebase实例ID令牌来识别应用程序实例，并定期将数据发送到Firebase后端.

Subscribes to topic in the background. The subscribe operation is persisted and will be retried until successful. This uses a Firebase Instance ID token to identify the app instance and periodically sends data to the Firebase backend.

这是 Android FCM远程通知的官方示例.测试此项目，如果不订阅通知，则应用停止后将不会收到通知.

Here is a official sample for Android FCM Remote Notifications.After testing this project,If not subscribing notification, notification will not receive when app stopped.

在加载应用程序时，您可以尝试使用以下代码:

You can have a try.Code as follow when App load:

FirebaseMessaging.Instance.SubscribeToTopic("news");

这篇关于应用关闭时未收到fcm通知的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！