how to create grid view.builfer in flutter code example

Example 1: gridview builder

body: GridView.builder(
  itemCount: data.length,
  gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
      crossAxisCount: (orientation == Orientation.portrait) ? 2 : 3),
  itemBuilder: (BuildContext context, int index) {
    return new Card(
      child: new GridTile(
        footer: new Text(data[index]['name']),
        child: new Text(data[index]
            ['image']), //just for testing, will fill with image later
      ),
    );
  },
),

Example 2: grid view in flutter

CustomScrollView(
  primary: false,
  slivers: <Widget>[
    SliverPadding(
      padding: const EdgeInsets.all(20),
      sliver: SliverGrid.count(
        crossAxisSpacing: 10,
        mainAxisSpacing: 10,
        crossAxisCount: 2,
        children: <Widget>[
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text("He'd have you all unravel at the"),
            color: Colors.green[100],
          ),
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text('Heed not the rabble'),
            color: Colors.green[200],
          ),
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text('Sound of screams but the'),
            color: Colors.green[300],
          ),
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text('Who scream'),
            color: Colors.green[400],
          ),
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text('Revolution is coming...'),
            color: Colors.green[500],
          ),
          Container(
            padding: const EdgeInsets.all(8),
            child: const Text('Revolution, they...'),
            color: Colors.green[600],
          ),
        ],
      ),
    ),
  ],
)