title: Importing Google play services library to mobile ads example
body: <p>I am trying to run the <code>GoogleAdsSampleActivity</code> class . I have made reference to the Google Play services library but I am getting following error . Please help me to figure out what's wrong. I googled a lot but did not manage to found any solution. Any help would be much appreciated.Thanks!</p>
  
  <p>I got the following error :-</p>
  
  <pre><code>   04-26 01:01:17.174: E/dalvikvm(1482): Could not find class 'android.support.v4.app.FragmentActivity', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.showErrorDialogFragment
  </code></pre>