title: call a method from another fragment by view pager
body: <p>I have two fragment class (#1 and #2) in my fragment activity.The fragment activity is used in view pager.
  How can i call a method of fragment#2 in fragment#1?
  Please, notice the attached picture.</p>
  
  <p><a href="http://upload7.ir/imgs/2014-09/92109715706282282966.jpg" rel="nofollow">http://upload7.ir/imgs/2014-09/92109715706282282966.jpg</a></p>