Simple Login Register app.
Login and Sign Up app with Validation.
Reference:-
- http://sujeet9.blogspot.com/2017/02/email-id-validation-in-android.html
- https://www.youtube.com/watch?v=1WPAXHhG6u0
- https://github.com/mistermayne/android-login
- https://codinginflow.com/tutorials/android/validate-email-password-regular-expressions
- https://www.tutorialspoint.com/android/android_login_screen.htm
- https://www.youtube.com/watch?v=bQGCgBnJixM
- https://www.youtube.com/watch?v=LjBD7iGRvS4