beer_list.dart

return new ListView.builder(
                itemBuilder: (BuildContext context, int index) {
                  var beer = beers[index];
                  return new Card(
                      child: new Column(
                        crossAxisAlignment: CrossAxisAlignment.stretch,
                        children: <Widget>[
                          new Text("Name: " + beer['name'],
                              style: TextStyle(
                                  fontWeight: FontWeight.bold, fontSize: 24)),
                          new Text("Country: " + beer['country'],
                              style: TextStyle(
                                  fontWeight: FontWeight.normal, fontSize: 20)),
                          new Text("ABV: " + beer['abv'],
                              style: TextStyle(
                                  fontWeight: FontWeight.normal, fontSize: 20)),
                         new Image.network(beer['image'], height: 200)
                        ],
                      ),
                      margin: EdgeInsets.only(
                          top: 10, bottom: 10, left: 10, right: 10));
                },
                itemCount: beers == null ? 0 : beers.length,
              );