Card

https://api.flutter.dev/flutter/material/Card-class.html
一个 Material Design 卡片。拥有一个圆角和阴影。定义如下：

Card({
  Key key,
  this.color,
  this.shadowColor,
  this.elevation,
  this.shape,
  this.borderOnForeground = true,
  this.margin,
  this.clipBehavior,
  this.child,
  this.semanticContainer = true,
})

示例1：

ListView(
  children: [
    Card(
      margin: EdgeInsets.all(10),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          ListTile(
            title: Text('张三', style: TextStyle(fontSize: 28)),
            subtitle: Text('高级软件工程师'),
          ),
          ListTile(
            title: Text('电话：13432143434'),
          ),
          ListTile(
            title: Text('地址：******'),
          ),
        ],
      ),
    ),
  ],
);

示例2：

ListView(
  children: [
    Card(
      margin: EdgeInsets.all(10),
      child: Column(
        children: [
          AspectRatio(
            aspectRatio: 16 / 9,
            child: Image.network(
              'https://img.pic88.com/preview/2020/09/02/1599056029788949.jpg',
              fit: BoxFit.cover,
            ),
          ),
          ListTile(
            leading: CircleAvatar(
              backgroundImage: NetworkImage(
                'https://img.pic88.com/preview/2020/09/02/1599056029788949.jpg',
              ),
            ),
            title: Text('张三'),
            subtitle: Text('高级软件工程师'),
          ),
        ],
      ),
    ),
  ],
);