title: 2 fragments displayed dynamically in one tab of application
body: <p>I build an application which has tabs in it, and using <code>ViewPager</code> to swipe between the tabs.</p>
  
  <p>Is it possible that one tab will show <code>firstFragment</code>, and then when pressing a <code>Button</code> will show <code>firstFragment</code> and <code>secondFragment</code>?</p>