title: Multiple layouts in single activity or multiple activities?
body: <p>I've have doubt about layouts and activities and the main concern is the efficiency of the app . My question is </p>
  
  <p>Is it easy and efficient to use multiple layout XML files in a single activity like a single main activity and just change the view content of different XML files for example : Login and Registration layout files upon a single activity using handler</p>
  
  <p>OR</p>
  
  <p>Different activities , like for login page and registration page there are separate activities with corresponding layout files </p>
  
  <p>Which is the best practice in terms of efficiency and easiness ?
  Also please list out the pros and cons of these approaches ?
  And situations to use any one of these approaches?</p>
  
  <p>Thank you .</p>