title: Data Transfer in Fragments/Activity
body: <p>Hi i am new to <strong>Fragments</strong> i searched many pages but still i didn't get correct answer for my questions. I want to know how <strong>data transfer while implementing Fragments</strong>. I have three cases </p>
  
  <p><em>1. Fragment to Fragment data transfer</em> : By implementing a <strong>Callback Interface</strong></p>
  
  <p><em>2. Fragment to Activity data transfer</em> : By using <strong>getActivity()</strong>.</p>
  
  <p><em>3. Activity to Fragment data transfer</em> :  My problem was occurred here. I referred many sites but nobody given clear explanation.Please help me.</p>