title: how to use addPreferencesFromResource for android 2.X?
body: <p>Followed several howto but I can't understand,<br>
  how to use  <code>addPreferencesFromResource(R.xml.preferences)</code> because is deprecated.</p>
  
  <p>The best way is to use the <code>fragment</code> but fragments are available only later 3.0, I need to do for android version 2.x</p>
  
  <p>Which way I'll follow?</p>