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

None of the previous answers worked out for me.

The solution to keep the pages alive when switching the tabs is wrapping your Pages in an IndexedStack.

class Tabbar extends StatefulWidget {
  Tabbar({this.screens});

  static const Tag = "Tabbar";
  final List screens;
  @override
  State createState() {
  return _TabbarState();
  }
}

class _TabbarState extends State {
  int _currentIndex = 0;
  Widget currentScreen;

  @override
  Widget build(BuildContext context) {
    var _l10n = PackedLocalizations.of(context);

    return Scaffold(
  body: IndexedStack(
    index: _currentIndex,
    children: widget.screens,
  ),
  bottomNavigationBar: BottomNavigationBar(
    fixedColor: Colors.black,
    type: BottomNavigationBarType.fixed,
    onTap: onTabTapped,
    currentIndex: _currentIndex,
    items: [
      BottomNavigationBarItem(
        icon: new Icon(Icons.format_list_bulleted),
        title: new Text(_l10n.tripsTitle),
      ),
      BottomNavigationBarItem(
        icon: new Icon(Icons.settings),
        title: new Text(_l10n.settingsTitle),
      )
    ],
  ),
);
  }

  void onTabTapped(int index) {
    setState(() {
      _currentIndex = index;
    });
  }
}