https://github.com/jobpav1984/flutter_troubles/blob/master/lib/main.dart

main.dart

class ListPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 1,
      child: NestedScrollView(
        headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
          return <Widget>[
            SliverOverlapAbsorber(
              handle: NestedScrollView.sliverOverlapAbsorberHandleFor(context),
              sliver: SliverAppBar(title: Text("Items List")),
            ),
          ];
        },
        body: TabBarView(children: [
          SafeArea(
            top: false,
            bottom: false,
            child: Builder(
              builder: (BuildContext context) {
                return CustomScrollView(
                  key: PageStorageKey<String>('_'),
                  slivers: <Widget>[
                    SliverOverlapInjector(
                      handle: NestedScrollView.sliverOverlapAbsorberHandleFor(
                          context),
                    ),
                    SliverFixedExtentList(
                      itemExtent: 48.0,
                      delegate: SliverChildBuilderDelegate(
                        (BuildContext context, int index) {
                          return ListTile(
                            title: Text("item #$index"),
                            onTap: () => Navigator.pushNamed(
                                context, "/details",
                                arguments: index),
                          );
                        },
                        childCount: 55,
                      ),
                    )
                  ],
                );
              },
            ),
          )
        ]),
      ),
    );
  }
}