flutter GridView簡單使用

child: new Container(
                      color: Colors.deepOrange,
                      child: new GridView.count(
                        crossAxisCount: 2,
                        padding: const EdgeInsets.all(0.0),
                        mainAxisSpacing: 0.0,
                        crossAxisSpacing: 0.0,
                        children: <Widget>[
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                          new Text("這裡是廣告"),
                        ],
                      ))