title: DialogFragment.getDialog returns null
body: <p>I am trying to get the <code>Dialog</code> I have created with an extended <code>DialogFragment</code> using <code>DialogFragment.getDialog()</code> but it returns null.</p>
  
  <p>Basically I want to alter the text in the layout from the <code>FragmentActivity</code> which creates and shows the <code>DialogFragment</code>.</p>