title: flutter - fab button animation which will go to top from bottom
body: <p>I need help with the animation, when I click on the FAB icon in the first screen the icon will go up with animation and  the other screen (shown in second image) should be displayed with animation like curtain. And the fab icon should be set in the app bar just like second image.</p>
  
  <p>Bottom menu should be there in both of the screen just like the screenshots given.</p>
  
  <p><a href="https://i.stack.imgur.com/0hH7U.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0hH7U.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/fTI7R.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fTI7R.png" alt="enter image description here"></a></p>