title: android's Activity extender
body: <pre><code>android.app.Activty
      |
      |
      |
      |
  com.mycompany.ActivityWrapper
      |  &lt;--------------------------------\
      |       \                           |
      |       |                           |
      |       |                           |
      |   android.app.ListActivty     android.app.ExpandableListActivity
      |           |                       |
      |           |                       |
      |           |                       |
  MyActivity1     |                      |
                  |                       |
              MyActivity2                 MyActivity3
  </code></pre>
  
  <p>I need to make class (com.mycompany.ActivityWrapper) which extends  android.app.Activity and 
  extends following methods:</p>
  
  <ul>
  <li>onCreate     </li>
  <li>onResume     </li>
  <li>onConfigurationChanged   </li>
  <li>onMenuOpened</li>
  </ul>
  
  <p>I want all my activities (which already extends at the monent android.app.Activity, android.app.?ListActivity)
  use code of my com.mycompany.ActivityWrapper</p>
  
  <p>I have no ideas how to implement this ( maybe via reflection %) ).</p>
  
  <p>Help me, plz</p>