Firebase 推送通知未收到答案

【问题标题】：Firebase Push Notifications does not receiveFirebase 推送通知未收到
【发布时间】：2018-01-31 10:56:11
【问题描述】：

我正在尝试 Firebase 推送通知。我做了教程中所说的一切，但它不起作用。

FirebaseMessagingService：

  package com.example.firebasenf.firebasenf;

import com.google.firebase.messaging.FirebaseMessagingService;/

public class MyFirebaseMessagingService extends FirebaseMessagingService {
}

FirebaseInstanceIdService：

package com.example.firebasenf.firebasenf;

import com.google.firebase.iid.FirebaseInstanceIdService;

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
}

清单：

            <service
            android:name=".MyFirebaseMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT"/>
            </intent-filter>
        </service>
        <service
            android:name=".MyFirebaseInstanceIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
            </intent-filter>
        </service>

【问题讨论】：

至少创建一个通知方法来发送通知..它不会发生魔法
这是你的完整代码吗？？
是的，但我做了和我在这里看到的一样的事情：youtube.com/watch?v=XZtDZyW4Zvc

标签： android firebase firebase-notifications

【解决方案1】：

您需要在代码中添加一些方法：

FirebaseMessagingService：

    package com.example.firebasenf.firebasenf;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage){
        Intent intent = new Intent(this,MainActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_ONE_SHOT);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
        notificationBuilder.setContentTitle("Application Title");
        notificationBuilder.setContentText(remoteMessage.getNotification().getBody());
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);
        notificationBuilder.setContentIntent(pendingIntent);
        NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0,notificationBuilder.build());
    }
}

FirebaseInstanceIdService ：

package com.example.firebasenf.firebasenf;

import android.util.Log;

import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    private static final String REG_TOKEN = "REG_TOKEN";

    @Override
    public void onTokenRefresh(){
        String recent_token = FirebaseInstanceId.getInstance().getToken();
        Log.d(REG_TOKEN,recent_token);
    }
}

【讨论】：

【解决方案2】：

您需要在MyFirebaseMessagingService 类中覆盖onMessageReceived，以便在推送通知时执行一些操作。

doc

通过重写 FirebaseMessagingService.onMessageReceived 方法，您可以根据接收到的 RemoteMessage 对象执行操作，并且获取消息数据

@Override
public void onMessageReceived(RemoteMessage remoteMessage) 
{

    Log.d(TAG, "From: " + "Notification Received");


    // TODO(developer): Handle FCM messages here.
    Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) 
    {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }

    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.

    //You may want show notification
}

记住onMessageReceived只有在应用程序在前台时才会触发

当您的应用处于后台时，Android 会发送通知消息到系统托盘。用户点击通知会打开默认应用启动器。

【讨论】：