title: Make 'static' class observable
body: <p>I have a class <code>Settings</code> with static methods which I use to save and load my data. This is for example the <code>Save()</code> method:</p>
  
  <pre><code>public static void Save(SETTING_KEY key, String value)
  {
      SharedPreferences sp = _context.getSharedPreferences(prefName, Context.MODE_PRIVATE);
      SharedPreferences.Editor editor = sp.edit();
  
      editor.putString(key.toString(), value);
      editor.commit();    
  }
  </code></pre>
  
  <p>Now I'd like to make the class <code>Settings</code> observable. The problem is that extending my Settings-class from Observable does not work, as I don't instantiate this class as I only use its static methods.</p>
  
  <p>Is there any easy way to make this static class observable?</p>