title: Call notifyDataSetChanged() on other list fragment/tab
body: <p>I have add three list fragments on activity. </p>
  
  <ol>
  <li>Contact list fragment</li>
  <li>Tasks list fragment</li>
  <li>Bookmarks list fragment</li>
  </ol>
  
  <p>Users can bookmark items on Tab1 and Tab2 and then it displays in Bookmark tab/fragment.</p>
  
  <p>i want to know, while bookmarking on Tab1 or Tab2, how can i call notifyDataSetChanged() for Bookmarks fragment to refresh listview.</p>
  
  <p>Can i get listAdapter associated with other list fragments to refresh listview items.</p>
  
  <p>Thanks.</p>