articles.dart

class MyAppBar3 extends StatelessWidget {
  final String imgUrl3;
  const MyAppBar3({Key key, this.imgUrl3}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return SliverAppBar(
      centerTitle: false,
      shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.vertical(bottom: Radius.circular(15.0))),
      actions: <Widget>[
        IconButton(
          icon: IconButton(
            icon: Icon(Icons.star_border),
            onPressed: () {
            },
          ),
          tooltip: 'Dodaj do ulubionych!',
          onPressed: () {},
        )
      ],
      backgroundColor: Colors.green[800],
      expandedHeight: 250.0,
      pinned: true,
      flexibleSpace: FlexibleSpaceBar(
        background: Image.network(
          imgUrl3,
          fit: BoxFit.cover,
        ),
      ),
      title: const Text(
        'xxxx',
        style: TextStyle(fontFamily: 'OpenSans', fontSize: 15.0),
      ),
    );
  }
}