android fcm notification not received when app is killed

Question

I followed official sample and extends FirebaseMessagingService

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

and my push json

{
"message":{
    "token":"my fcm token",
    "android":{
        "priority": "high",
        "data":{
            "key1":"123","key2":"456"
        }
    }
}

}

I reveived fcm from

@Override public void onMessageReceived(RemoteMessage remoteMessage) {}

until I killed my app from recent application.

My android os is Android 8.1 (API level 27)

I have test on android 7.1(API level 25), it can receive message, even app got killed.

firebase messaging service will only get called if the app is in the background. Once the app is completely killed only a foreground notification will be shown when applicable — SteelToe, Mar 19 '19 at 03:21
yes, beware of the two types of fcm message, foreground/background, they receive different parts of the data and handled in different ways. If your app is killed, it will be handled by system. System will only read specific columns. — Wesely, Mar 19 '19 at 03:36
@Wesely do you mean using `notification` key? I tried but it still not received anything. — youteng li, Mar 19 '19 at 05:34
@primo I have two device got same result. 1 oppo r17 android 8.1. 2 asus rog phone android 8.1. — youteng li, Mar 19 '19 at 06:22
You will get it in settings->About phone. You will get "colorOs version " or something else — primo, Mar 19 '19 at 06:48
check this link https://stackoverflow.com/questions/52736782/fcm-push-notification-not-working-when-app-close-in-some-of-the-devices-like-xia?noredirect=1&lq=1 and this link https://stackoverflow.com/a/52943903/8101634 — primo, Mar 19 '19 at 06:56
Provide ChannelID while triggering from FCM. It worked for me. — Zala Krunal, Aug 01 '20 at 16:19

score 0 · Answer 1 · answered Mar 19 '19 at 05:07

0

See this part :

   @Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);

    System.out.println("Remote Data" + remoteMessage);

    //Check if msg contains Data'
    if (remoteMessage.getData().size() > 0) {
        System.out.println("Message Data : " + remoteMessage.getData());
        sendNotification(remoteMessage.getData().get("body"));
    }

    //Check if message contains notification
    if (remoteMessage.getNotification() != null) {

        System.out.println("Message Body " + remoteMessage.getNotification().getBody());
        sendNotification(remoteMessage.getNotification().getBody());
    }
}

Reference link :

Check Here

answered Mar 19 '19 at 05:07

Abhinav Gupta

2,225
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thank you for reply, but it not work for me. I had done this part before. – youteng li Mar 19 '19 at 05:35
@youtengli can you show your code what you did in this part? – Abhinav Gupta Mar 19 '19 at 05:36
https://github.com/youtengli/myfcm/blob/master/MyFirebaseMessagingService.java – youteng li Mar 19 '19 at 06:13
@youtengli have checked reference link? – Abhinav Gupta Mar 19 '19 at 06:21
Do you mean fcm link? I can receive message when app is open or not killed(onPause). – youteng li Mar 19 '19 at 06:27
please debug your code once to make sure service is not crashing while app receive push. as your code seems ok – Jaykishan Sewak Mar 19 '19 at 07:42

score 0 · Answer 2 · answered Mar 19 '19 at 06:09

Deat @youteng notification in oreo must needed Channel Id inside notification builder object. So check in your code if you have added channel id or not. you can have look in below code. Also have look here

// Sets an ID for the notification, so it can be updated.
int notifyID = 1; 
String CHANNEL_ID = "my_channel";// channel id 
CharSequence name = getString(R.string.channel_name);// The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
// Create a notification and set the notification channel.
Notification notification = new Notification.Builder(MainActivity.this)
            .setContentTitle("New Message")
            .setContentText("You've received new messages.")
            .setSmallIcon(R.drawable.ic_notify_status)
            .setChannelId(CHANNEL_ID)
            .build();

thank you for reply, here are what I done but not work. https://github.com/youtengli/myfcm/blob/master/MyFirebaseMessagingService.java — youteng li, Mar 19 '19 at 06:16

score 0 · Answer 3 · answered Mar 19 '19 at 06:17

There are so many details while implementing FCM. Use tools to check the sender side and receiver side. And there comes the background/foreground parts.

If your message format aren't correct, it will not trigger onReceive() when app is in background. By correct I mean it contains only data{...}, without notification{...}

Before dig into your server side's code, have you test your client side by sending a message from Firebase Console's web tool or the FCM API?

POST https://fcm.googleapis.com/fcm/send

I don't know what language you're using on server side, but the original message should look like this (from official)

POST https://fcm.googleapis.com/v1/projects/myproject-b5ae1/messages:send HTTP/1.1

Content-Type: application/json
Authorization: Bearer ya29.ElqKBGN2Ri_Uz...HnS_uNreA
{
  "message":{
    "topic" : "foo-bar",
    "notification" : {
      "body" : "This is a Firebase Cloud Messaging Topic Message!",
      "title" : "FCM Message"
      }
   }
}

yes, I send by `fcm api`, I tried only `notification` or `data` and both. I can receive message when app open or onPause. By the way, I can receive message on android 7(api level 25), even app got killed. — youteng li, Mar 19 '19 at 06:36

android fcm notification not received when app is killed

3 Answers3