title: NoClassDefFoundError Android with ActionBarActivity
body: <p>I currently have an <code>ActionBarActivity</code> which always returns a <code>NoClassDefFoundError</code>. I've read that it might be a problem with the ADT but I cannot be sure, hence my question. I've imported the ActionBar sample from the Android samples under </p>
  
  <p><code>android-sdk\samples\android-14\ActionBarCompat</code></p>
  
  <p>I've labelled the ActionBarCompat project as a library under Project -> Properties but I'm still getting the error.</p>
  
  <p>To reiterator:</p>
  
  <pre><code>public class SearchActivity extends ActionBarActivity { // Doesn't work, yields exception
  
  public class SearchActivity extends Activity { // Works perfectly
  </code></pre>
  
  <p>Has anyone else experienced a similar error and perhaps found a solution?</p>
  
  <p>Thanks in advance.</p>