What is the correct and most memory efficient way to send notifications while in background?

Question

I'm building a chat app and I noticed that when I wanted to build notifications, I saw that Slack doesn't use a Service to push notifications while in the background.

I was just curious if it's possible to push notifications without using a Service and if it's more efficient or less time consuming than using a Service .

Answer 1

Are you wanting to send a notification when something happens, like a chat message is received? If so, and if that event sends a system-wide broadcast, then you should register a BroadcastReceiver to listen for it and build your notification whenever it sees the event is broadcast. You can also schedule timed notifications this way.