pull_to_refresh.dart

// method in a widget that inherits stateful widget
Future<void> _refreshFoo(BuildContext context) async {
  // First category: Foo
    await Provider.of<Foo>(context, listen: false)
        .fetchFoo(true);
//Second category: Bar
  await Provider.of<Bar>(context, listen: false)
        .fetchBar(true);
  }

// Your home page body
body: FutureBuilder(
        future: _refreshProducts(context),
        builder: (ctx, snapshot) =>
            snapshot.connectionState == ConnectionState.waiting
                ? Center(
                    child: Container(
                      width: 100,
                      height: 100,
                      margin: EdgeInsets.all(100.0),
                      child: Spinner(),
                    ),
                  )
                : RefreshIndicator(
                    onRefresh: () => _refreshFoo(context),
                    child: Consumer<Products>(
                      builder: (ctx, foo, _) {
                        return // your home page content
                        }
                    ),
                  ),
      ),