title: The import com.handmark cannot be resolved
body: <p>I am trying to get this code working: <a href="http://quickblox.com/developers/Android_XMPP_Chat_Sample" rel="nofollow noreferrer">http://quickblox.com/developers/Android_XMPP_Chat_Sample</a>
  Even though the library is present in the project folder. I have already tried to clean and build the project but that does not work. No jar is provided by Quickblox in the sample. It is just present in the folder.
  <br>Both these cannot be resolved:</p>
  
  <pre><code>import com.handmark.pulltorefresh.library.PullToRefreshBase;
  import com.handmark.pulltorefresh.library.PullToRefreshListView;
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/U6UxB.png" alt="enter image description here"></p>