title: Android develop sign in and sign up in the same activity
body: <p>I saw many login samples(for example android studio login activity, firebase auth quickstart sample) that the sign in and the sign up buttons are in the same activity.
  so they use the same fields.
  and i am wondering if it is clear that when you click the sign up button you create a new account with the email and password you entered above.
  link to a screenshot from my login activity
  <a href="https://i.stack.imgur.com/U7tBD.jpg" rel="nofollow noreferrer">https://i.stack.imgur.com/U7tBD.jpg</a></p>