Background Push Notification

readme.md

Send title and message in data rather than notification

Only foreground receives:

{
   "to": "the device token"
   "notification": {
     "title":"New Notification!",
     "body":"Test"
   },
   "priority":10
 }

For background handling:

{
  "to": "the device token"
  "data": {
    "title":"New Notification!",
    "body":"Test"
  },
  "priority":10
}

References

• How to handle notification when app in background in Firebase
• https://wajahatkarim.com/2018/05/firebase-notifications-in-background--foreground-in-android/
• https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app
• https://documentation.onesignal.com/docs/data-notifications#2-notification-payload-data

notification-handler.java

public class NotificationService extends FirebaseMessagingService { 
  @Override
  public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    Notification notification = new NotificationCompat.Builder(this)
      .setContentTitle(remoteMessage.getData().get("title"))
      .setContentText(remoteMessage.getData().get("body"))
      .setSmallIcon(R.mipmap.ic_launcher)
      .build();
     NotificationManagerCompat manager = NotificationManagerCompat.from(getApplicationContext());
     manager.notify(123, notification);
   }
}

notification-send.php

<?php
 
$fcmNote = FcmNotification::create()
    ->setTitle('Aviso')
    ->setBody($notificationBody)
;
// add notification data to receive in background
$pushData['title'] = 'Aviso';
$pushData['message'] = $notificationBody;

$message = FcmMessage::create()
    ->setPriority(FcmMessage::PRIORITY_NORMAL)
    ->setTimeToLive(86400)
    ->setNotification($fcmNote)
   // add data array to send in data field
    ->setData($pushData)
;