title: Disable rating on RatingBar
body: <p>I'm using a RatingBar and OnRatingBarChangeListener in my Code.
  The user can the rating once and after this I set 
          <code>ratingBar.setEnabled(false)</code> .
  I want to show the user advice that he can't rate anymore.
  How can I achieve to set a Toast after the user touches the disabled RatingBar?</p>
  
  <p>Anybody an idea?</p>
  
  <p>greetings  </p>