使用 ListView.separated 添加顶部和底部分隔符

Container(
                  height: 400,
                  child: ListView.separated(
                    itemCount: 100 + 2,
                    separatorBuilder: (_, __) => Divider(height: 0.5),
                    itemBuilder: (context, index) {
                      if (index == 0 || index == 100 + 1) {
                        return Container(); // zero height: not visible
                      }
                      return Text("${index}");
                    },
                  ),
                )