How to send the Group Notifications using Firebase Cloud messaging?

Question

I am trying to develop the Messenger App like Whatsapp using Firebase.

I'm already done the code for device to device notifications and now I am trying to send the notifications to specified group.

Please provide the example code for the Group Notifications.

Answer 1

There are a few ways to send messages to groups of users:

1. Send the message to a topic that all users subscribe to . This is the simplest scenario, since you don't need to keep a list of tokens. But you have less control over the actual people that receive the message, as anyone who knows a topic can subscribe to it.

2. Keep a list of device tokens for each group in your app server, and then send to each individual device in the group .

   You can also use the previous version of the API to send to batches of up to 500 tokens at a time . This sort of multicast delivery is not yet possible in the new API.

   For an example of this, see the documentation of Cloud Functions and the sample repo .

3. Send to a device group with the legacy API . I'd only recommend this approach if the devices are actually owned by one user, which is the case that device groups are meant for.

Answer 2

Try this link

Don't forget this line Authentication:

key=<Your_API_Key> 

The word (key) is important