detail_page.dart

class DetailPage extends StatelessWidget {
  final String image;
  final int id;

  DetailPage({@required this.id, @required this.image});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(),
      body: NestedScrollView(
        headerSliverBuilder: (context, isScrolled) {
          return [
            Hero(tag: id, child: Image.network(image));
          ];
        },
        body: // your body widget to show the data from the API.
      ),
    );
  }
}