Now we have to work on LoginActivity. As we are building this application utilizing the MVP pattern, LoginActivity is effectively a view. Obviously, LoginActivity is quite different from any generic view. It is a view that is concerned with login procedures. We can identify a set of necessary behaviors that a view presenting a login interface to a user must possess. Such behaviors are:
- It must show a progress bar to a user when the login is in progress
- It must be capable of hiding the progress bar when the need arises
- It must be able to show appropriate field errors to users when encountered
- It must be able to navigate the user to his home screen
- It must be able to navigate an unregistered user to a signup screen ...
