title: In Android applications what is the role of "R.java"?
body: <p>Android applications have an automatically generated file called "R.java". Please explain its purpose.</p>
  
  <p>E.g.</p>
  
  <ul>
  <li>What is contained in it?</li>
  <li>What generates it?</li>
  </ul>
  
  <p><em>Duplicate:</em> <a href="https://stackoverflow.com/questions/10004906/what-is-the-concept-behind-r-java">What is the concept behind R.java?</a></p>