make list tile leading big code example

Example 1: leading image flutter

ListTile(
  leading: CircleAvatar(
    backgroundImage: Image.file(file),
    child: GestureDetector(onTap: () {}),
    ),
// (...)
);

Example 2: flutter listtile height

class CustomListItem extends StatelessWidget {
  const CustomListItem({
    this.thumbnail,
    this.title,
    this.user,
    this.viewCount,
  });

  final Widget thumbnail;
  final String title;
  final String user;
  final int viewCount;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 5.0),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Expanded(
            flex: 2,
            child: thumbnail,
          ),
          Expanded(
            flex: 3,
            child: _VideoDescription(
              title: title,
              user: user,
              viewCount: viewCount,
            ),
          ),
          const Icon(
            Icons.more_vert,
            size: 16.0,
          ),
        ],
      ),
    );
  }
}

class _VideoDescription extends StatelessWidget {
  const _VideoDescription({
    Key key,
    this.title,
    this.user,
    this.viewCount,
  }) : super(key: key);

  final String title;
  final String user;
  final int viewCount;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(5.0, 0.0, 0.0, 0.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(
            title,
            style: const TextStyle(
              fontWeight: FontWeight.w500,
              fontSize: 14.0,
            ),
          ),
          const Padding(padding: EdgeInsets.symmetric(vertical: 2.0)),
          Text(
            user,
            style: const TextStyle(fontSize: 10.0),
          ),
          const Padding(padding: EdgeInsets.symmetric(vertical: 1.0)),
          Text(
            '$viewCount views',
            style: const TextStyle(fontSize: 10.0),
          ),
        ],
      ),
    );
  }
}

// ...

Widget build(BuildContext context) {
  return ListView(
    padding: const EdgeInsets.all(8.0),
    itemExtent: 106.0,
    children: <CustomListItem>[
      CustomListItem(
        user: 'Flutter',
        viewCount: 999000,
        thumbnail: Container(
          decoration: const BoxDecoration(color: Colors.blue),
        ),
        title: 'The Flutter YouTube Channel',
      ),
      CustomListItem(
        user: 'Dash',
        viewCount: 884000,
        thumbnail: Container(
          decoration: const BoxDecoration(color: Colors.yellow),
        ),
        title: 'Announcing Flutter 1.0',
      ),
    ],
  );
}