onMessageReceived() not getting called when app is killed?

Question

I am using Firebase to send push notifications to my app. My app supports till API level 27.I am using FirebaseMessagingService to receive notifications. Inside onMessageReceived() method I am taking data payload and creating own notification in tray. From console I am sending only data payload since i dont want app to create system notifications if the app is in background. Now I am able to get callback in onMessageReceived() when app is in foreground and background. But the issue is its not getting invoked when the app is cleared from the memory(or killed). How can I get callback in onMessageReceived when my app is killed?

Manifest.xml

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

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

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="promotions" />

FcmMessagingService.java

public class FcmMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    if (remoteMessage == null)
        return;

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

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Logger.v(Logger.TAG, "Data Payload: " + remoteMessage.getData().toString());

        try {
            //JSONObject json = new JSONObject(remoteMessage.getData().toString());
            NotificationHandler.handleNotification(this, formNotificationObject(null));
        } catch (Exception e) {
            Logger.e(Logger.TAG, "Exception: " + e.getMessage());
        }
    }
}

private Notification formNotificationObject(JSONObject data) {
   //creating notifcation object here
  }

build.gradle

compile "com.google.firebase:firebase-messaging:11.4.2"
compile 'com.facebook.android:facebook-android-sdk:4.29.0'
compile "com.android.support:appcompat-v7:26.0.0"

Payload

{
  "to": "cogzTKfWsXI:APA9................plSjNu",
  "mutable_content": false,
  "time_to_live": 20,
  "data": {
   "messageid": 10,
   "title": "Test",
   "body": "Testing",
   "image": "",
   "expiry": "2018-11-13 11:35:11"
  }

}

I think onMessageReceived should not be called when app is killed , because it's code in your app and your app is killed — Ali Faris
@sandeepkolhal I am testing iin One plus five Oxygen OS 5.0 , Oreo. — andro-girl
Have you tested on any other mobile ? try this stackoverflow.com/questions/36035284/… — sandeep kolhal
@sandeepkolhal I am testing only in One plus five since that is the only available device with Oreo OS here. — andro-girl

yoonhok yoonhok · Accepted Answer · 2018-01-31T08:07:23

If you are sending the Message in "Firebase Console - Notifications composer", it always used in foreground.

There are two type of message.

Notification Message
Data Message

In case of Notification Message, it is handled just in Foreground. But in case of Data Message, it can be handled in Background.

And sending the message through "Firebase console - Notification", means that the message type is "Notification Message".

If you want to send the type of Data Message, you should use Firebase Cloud Functions or others.

You can check following link: https://firebase.google.com/docs/cloud-messaging/concept-options#notifications_and_data_messages

And this link: https://firebase.google.com/docs/cloud-messaging/android/receive#handling_messages

onMessageReceived() not getting called when app is killed?

2 Answers

The problem

The fix