Firebase API Is Not Sending Push Notifications When Using the API

Firebase API is not sending push notifications when using the API

I got contacted by Firebase support and was able to find out what is wrong

My push payload was missing a notification object

{ 
 "to": "<registration token>",
 "priority": "high",
 "notification": {
    "title": "Your Title",
    "text": "Your Text"
  }
 "data": {
     "customId": "<my custom id>",
     "badge": 1,
     "sound": "cheering.caf",
    "alert": "New data is available"
  }
}

I hope that helps someone else

Firebase Push Notification not working with API 28

Create a channel and set the importance

Before you can deliver the notification on Android 8.0 and higher, you
must register your app's notification channel with the system by
passing an instance of NotificationChannel to
createNotificationChannel().

As the documentation say, you need to add a notification channel in android 8 and higher so the system shows your notification.

private void createNotificationChannel() {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = getString(R.string.channel_name);
        String description = getString(R.string.channel_description);
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }
}

Can't send push notifications using the server API

On iOS the priority field seems mandatory.

{   
  "to": "cHPpZ_s14EA:APA91bG56znW...",
  "priority": "high",
  "notification" : {
    "body" : "hello!",
    "title": "afruz",
    "sound": "default"
  }
} 

Failed to send the FCM push notification using the REST API

There's a Line Feed (LF) character in your URL (%0A after URL encoding) which is not valid API URL. That may have been added while copying from the documentation or other source.

The URL should be /fcm/send instead of /fcm/send%0A.

Firebase push notification delivery report

In my case that was because of overriding handleIntent function in FirebaseMessagingService. So with removing this function from service the problem fixed.

Firebase Cloud Messaging - PHP Rest API not working for iOS

Android and iOS handle Push Notifications differently. While Android will only wake from background when only the data tag is provided, iOS devices require the notification tag to deal with notifications received while the app is in the background.

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