How to preserve widget states in flutter, when navigating using BottomNavigationBar?

Question

I\'m currently working on building a Flutter app that will preserve states when navigating from one screen, to another, and back again when utilizing BottomNavigationBar. Ju

Answer 1

Use “IndexedStack Widget” with “Bottom Navigation Bar Widget” to keep state of Screens/pages/Widget

Provide list of Widget to IndexedStack and index of widget you want to show because IndexedStack show single widget from list at one time.

final List _children = [
    FirstClass(),
    SecondClass()
  ];

Scaffold(
  body: IndexedStack(
    index: _selectedPage,
    children: _children,
  ),
  bottomNavigationBar: BottomNavigationBar(
    ........
    ........
  ), 
);