How to implement messenger functions in Android application?

Question

Java

It is necessary to develop a simple messenger that works via the Internet, with the functions of authorization, sending and receiving messages. It will be used not for a wide range of people, but for submitting a personal project to an IT school. Where can I get the necessary information for the application to work with the Internet, and the implementation of these functions?

Answer 1

https://developer.layer.com/docs/quick-start/android
or
www.learn2crack.com/2014/06/android-chat-applicati...