Want to understand it without RXJava

[TheReprator]

In the domain section, Rxjava is the thing which redirects the result from respective data source to corresponding presenter for success or Error

So, I only want to understand how can I do it without RXJava, as. It will be great if you can provide me sample to do it without RXjava or how didi't worked

[andremion]

Here is a good repo to see how it works without any reactive library.
https://github.com/googlesamples/android-architecture/tree/todo-mvp-clean/

Basically you will need to use callbacks back and forth.

As you can see there, the presenter, usecase, repository, use callbacks with some kind of success and error methods to handle the results.