title: ActivityNotFoundException when launching intent from preferences
body: <p>test.class type is right? How to? What should I do?</p>
  
  <pre><code>&lt;Preference 
      android:key="test" 
      android:title="test" 
      android:summary="test"&gt; 
     &lt;intent android:action="test.class" &gt;  &lt;=== **ERROR/AndroidRuntime(2384): android.content.ActivityNotFoundException: No Activity found to handle Intent** 
      &lt;/intent&gt;  
  &lt;/Preference&gt; 
  </code></pre>