title: Android read from keyboard
body: <p>I have this logon screen with no textfields at all. When the user scans his id token with rfid scanner, i'll get a 8 character long string. Its the same princip as using an keyboard(just faster). I want my login activity to act, when the user has scanned his token and not before. Is there a smart way implementing this? I can't have any button or textfields, so I have to read keyboard input without listening to a EditText field.</p>
  
  <p>So, an empty screen with an image(lock), that listens to an rfid reader(or keyboard) and act when the character count is 8. </p>