Problem with notification icon

Question

I know there are several questions related to this. However, I have found nothing with my specific case. I will explain...

I use the same code to display a notification both for notifications when the app is in the foreground and for in the background. Behold:

final int icon = R.drawable.ic_stat_name; // aqui está a imagem

        PendingIntent resultPendingIntent;

        resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        resultPendingIntent =
                PendingIntent.getActivity(
                        mContext,
                        0,
                        resultIntent,
                        PendingIntent.FLAG_CANCEL_CURRENT
                );

        final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
                mContext, CHANNEL_ID);

        Notification notification;

        NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

        inboxStyle.addLine(message);
        notification = mBuilder
                .setSmallIcon(icon)
                .setAutoCancel(true)
                .setContentTitle(title)
                .setContentIntent(resultPendingIntent)
                .setStyle(inboxStyle)
                .setContentText(message)
                .setColor(ContextCompat.getColor(mContext, R.color.colorPrimary))
                .build();
        Log.i("Notificação -> ", "Foi gerada");
        NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(NOTIFICATION_ID, notification);

And in both cases they show the notification successfully, but only when the application is in the background the image presents error:

I don’t believe the mistake is in the picture, but I could be wrong. I researched the standard android for versions prior to Lollipop and I believe I am acting in the correct way... Mas... I may be wrong again. What would be strange, because android would present the image one way and another not?

Does anyone suggest anything? If you need more information I am available.

Remarks

1 - Even if I create an Asset vector in xml with android studio the result is exactly the same.

2 - I did tests on several different emulators and the result is the same.

Answer 1

After taking the test by changing the

.setContentText(message)

for

.setContentText("Passed by my function")

the function that should be called

It was found that the firebase was treating the push when the app was on background and so the image was not appearing.

Knowing that we have two options:

• You can send the icon by setting the push. The problem here is that if it is essential that the push go through the function, this solution will not solve.

• Do the push so that the firebase always go through the function. Unfortunately I’ve never done this but maybe this link will help you https://stackoverflow.com/a/37845174/2456894

Answer 2

Perform the following Test:

{
  "to": "MYDEVICETOKEN",
  "notification": {
    "body": "Test from postman",
    "icon": "ic_notification"
  }
}