title: Flutter implement tab
body: <p>I'm trying to make a page design like this:</p>
  <p><a href="https://i.stack.imgur.com/Zu2Gv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Zu2Gv.png" alt="enter image description here" /></a></p>
  <p>But I'm having difficulties on implementing the tab bar. When the user click on 'Detail', then the detail view is showed under the tab bar and so on. Is there any widget to use?</p>