title: Adding g+1 button in Libgdx
body: <p>I wish to add g+1 in my LibGdx based android gaming app. I am following this link to understand the g+1 related coding.
  <a href="https://developers.google.com/+/mobile/android/recommend?hl=en" rel="nofollow">https://developers.google.com/+/mobile/android/recommend?hl=en</a></p>
  
  <p>In Libgdx, we do not have a relative layout to have the button "com.google.android.gms.plus.PlusOneButton". Hence I plan to draw a g+1 button.  But I wonder how to get the annotation bubble. getAnnotation() method is protected.</p>
  
  <p>Please advice.</p>