title: String.xml or Constants class
body: <p>What is better approach of the following in designing an Android app</p>
  
  <ol>
  <li>To place all the String constants in <code>res/values/Strings.xml</code>
  or </li>
  <li>Create a class like <code>Constant.java</code> where all Strings are <code>public static final</code>?</li>
  </ol>
  
  <p>Choosing which one of them is more efficient?</p>