Firebase设备到设备推送通知代码成功运行，但未收到通知

Question

我正在尝试使用Firebase将推送通知从一个Android设备发送到另一台Android设备，Firebase功能上的日志文件显示成功，但设备未收到通知。我尝试将推送通知手动发送到'notification'主题，它可以工作，但是在设备之间不起作用。我的代码有什么问题吗？

index.js：

// imports firebase-functions module
const functions = require('firebase-functions');
// imports firebase-admin module
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
/* Listens for new messages added to /messages/:pushId and sends a 
notification to subscribed users */
exports.pushNotification = 
functions.database.ref('/messages/{pushId}').onWrite((change,context) => {
console.log('Push notification event triggered');
/* Grab the current value of what was written to the Realtime Database */
var valueObject = change.after.val();
/* Create a notification and data payload. They contain the notification 
information, and message to be sent respectively */ 
const payload = {
    notification: {
        title: valueObject.title,
        body: valueObject.message,
        sound: "default"
    },
    data:{
        title: valueObject.title,
        message: valueObject.message
    }
   };
 /* Create an options object that contains the time to live for the 
 notification and the priority. */
 const options = {
    priority: "high",
    timeToLive: 60 * 60 * 24 //24 hours
 };
console.log('Title : ',valueObject.title);
console.log('Message : ',valueObject.message);
return admin.messaging().sendToTopic('notifications', payload, options);
});

MainActivity：

import android.support.annotation.NonNull;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.messaging.FirebaseMessaging;

public class MainActivity extends AppCompatActivity {

FirebaseDatabase database;
DatabaseReference myRef;

String dataTitle, dataMessage;
EditText title, message;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

// Handle possible data accompanying notification message.
    if (getIntent().getExtras() != null) {
        for (String key : getIntent().getExtras().keySet()) {
            if (key.equals("title")) {
                dataTitle=(String)getIntent().getExtras().get(key);
            }
            if (key.equals("message")) {
                dataMessage = (String)getIntent().getExtras().get(key);;
            }
        }
        showAlertDialog();
    }

    database = FirebaseDatabase.getInstance();
    myRef = database.getReference("messages");

    title = (EditText) findViewById(R.id.title);
    message = (EditText) findViewById(R.id.message);
   }

   private void showAlertDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Message");
    builder.setMessage("title: " + dataTitle + "\n" + "message: " + 
 dataMessage);
    builder.setPositiveButton("OK", null);
    builder.show();
 }

public void subscribeToTopic(View view) {

    FirebaseMessaging.getInstance().subscribeToTopic("notifications")
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    String msg = "Subscribed to Topic: Notifications";
                    if (!task.isSuccessful()) {
                        msg = "Failed to Subscribed to Topic: 
 Notifications";
                    }
                    Log.d("Firebase", msg);
                    Toast.makeText(MainActivity.this, msg, 
 Toast.LENGTH_SHORT).show();
                }
            });
    }

 public void sendMessage(View view) {
    myRef.push().setValue(new Message(title.getText().toString(), 
message.getText().toString()));
    Toast.makeText(this, "Message Sent", Toast.LENGTH_SHORT).show();
}

} 

消息：

public class Message {
private String title, message;

public Message(){}

public Message(String title, String message) {
    this.title = title;
    this.message = message;
}

public String getTitle() {
    return title;
}

public String getMessage() {
    return message;
}
}

FCM服务：

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;

import android.support.v4.app.NotificationCompat;
import android.util.Log;

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


public class FCMService extends FirebaseMessagingService {
private static final String TAG = "MyFirebaseMsgService";

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {


    String notificationTitle = null, notificationBody = null;
    String dataTitle = null, dataMessage = null;

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

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

/**
 //     * Create and show a simple notification containing the received FCM 
message.
 //     */
 private void sendNotification(String notificationTitle, String 
notificationBody, String dataTitle, String dataMessage) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.putExtra("title", dataTitle);
    intent.putExtra("message", dataMessage);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* 
Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= 
RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = 
(NotificationCompat.Builder) new NotificationCompat.Builder(this)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle(notificationTitle)
            .setContentText(notificationBody)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

    NotificationManager notificationManager =
            (NotificationManager) 
getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0 /* ID of notification */, 
notificationBuilder.build());
 }
}

日志：

7:35:01.589 AM
pushNotification
Function execution took 1016 ms, finished with status: 'ok'
7:35:00.895 AM
pushNotification
Message : Raman
7:35:00.895 AM
pushNotification
Title : Raman
7:35:00.810 AM
pushNotification
Push notification event triggered