title: Tab Layout tutorial incomplete?
body: <p>I've been trying to implement the tab UI described in this tutorial: <a href="https://developer.android.com/resources/tutorials/views/hello-tabwidget.html" rel="nofollow noreferrer">https://developer.android.com/resources/tutorials/views/hello-tabwidget.html</a></p>
  
  <p>I follow all the steps described in the process but I keep getting a runtime exception which I believe has something to do with the fact that nowhere in the tutorial I added the extra activities (songs, artists and albums) related to the content of each tab into the android manifest file.</p>
  
  <p>Am I correct? is this tutorial (like many others) faulty or incomplete?</p>