Flutter: BottomNavigationBar rebuilds Page on change of tab

Question

I have a problem with my BottomNavigationBar in Flutter. I want to keep my page alive if I change the tabs.

here my implementation

BottomNavigation

Answer 1

Just use an IndexedStack

 IndexedStack(
   index: selectedIndex,
   children:  [
       ProfileScreen(), 
       MapScreen(), 
       FriendsScreen()
     ],
  )