quickstart-android messaging app doesn't receive data messages in background

2ndGAB commented 8 years ago

Step 1: Are you in the right place?

Issues related to the code in this repository.
Step 2: Describe your environment
Android device: Asus Nexus 7 wifi
Android OS version: 6.0.1
Google Play Services version: 3.0.0
Firebase/Play Services SDK version: 9.2.1

But I cannot get it working on Nexus 7 LTE 6.0.1 or Samsung GT-9295 5.0.1 as well.

Step 3: Describe the problem:

I send the following message with Advanced REST Client, the message is sent successfully, but is only received in foreground and not when the application is in background.

{
    "to" : "egu9jGiMcew:APA91bFv2RewdzlrC4Q0 ... dYZgv91oZVfTtrfAojLMKZZmEURvbq-aA2",
    "data": {
        "title": "Title test",
        "msg": "Text of the test",
        "code": 2
    },
    "delay_while_idle" : false,
    "priority" : "high",
    "content_available" : true
}

Steps to reproduce:

Build the quickstart-android project
Execute the messaging app
Send it a data message when the application is in background

Observed Results:
- In my case, the message given above is not received. Is there any mistake in it?
- It seems that the message is received by the device as I see the following messages:
```
07-18 15:28:34.371 3068-3068/? W/GCM-DMM: broadcast intent callback: result=CANCELLED forIntent { act=com.google.android.c2dm.intent.RECEIVE flg=0x10000000 pkg=com.google.firebase.quickstart.fcm (has extras) }
```
Expected Results:
- The message should be received and generate a notification the application is in foreground or in background.
  Relevant Code:

My FirebaseMessagingService is:

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    /**
     * Called when message is received.
     *
     * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
     */
    // [START receive_message]
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // [START_EXCLUDE]
        // There are two types of messages data messages and notification messages. Data messages are handled
        // here in onMessageReceived whether the app is in the foreground or background. Data messages are the type
        // traditionally used with GCM. Notification messages are only received here in onMessageReceived when the app
        // is in the foreground. When the app is in the background an automatically generated notification is displayed.
        // When the user taps on the notification they are returned to the app. Messages containing both notification
        // and data payloads are treated as notification messages. The Firebase console always sends notification
        // messages. For more see: https://firebase.google.com/docs/cloud-messaging/concept-options
        // [END_EXCLUDE]

        // TODO(developer): Handle FCM messages here.
        // Not getting messages here? See why this may be: https://goo.gl/39bRNJ
        Log.i(TAG, "From: " + remoteMessage.getFrom());
        Log.i(TAG, "Notification Message Body: " + remoteMessage.getData());

        sendNotification("FCM message received");

        // 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.
    }
    // [END receive_message]

    /**
     * Create and show a simple notification containing the received FCM message.
     *
     * @param messageBody FCM message body received.
     */
    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        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 = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_stat_ic_notification)
                .setContentTitle("FCM Message")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

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