In recent times, Google moved from Google Cloud Messaging (GCM) to Firebase Cloud Messaging (FCM). Just like GCM.
Firebase Message Types:
1.Notification Message.
2.Data Message.
3.Both Notification & Data Message.
1.Notification Message:
- This Message is handled by firebase SDK itself
- This message can be send from firebase console
- Notification will be shown automatically when app is in background
- You have to use notification key
2.Data Message:
- Data message has to be handled by android app
- You have to use this,if you want to add some additional data along with the notification.
- Sending these messages through firebase console is not possible.
- You should use server side code to send the notification using firebase api.
- You have to use data key
3.Both Notification & Data Message:
- Message can contain both notification and data
- When this kind of message are send it will be handled depends on app state(back ground/fore ground).
When App is in Back ground: App receives the notification payload in the notification tray.and handle data payload when used clicked on notification.
When App is in Foreground: App receiver both payloads.
Firebase Message Targeting :
1.Send to Single User.
2.Topic Messaging.
1.Send to Single User:
When Single User is targeted,the firebase registration id is used to Identify the device.
The registration id has to be mentioned in to field
2.Topic Messaging:
This is useful when segment of users are targeted.
For this all user have to subscribe to firebase topic.
Topic Name has to be mentioned in in to field.
Android Ninja 