Divider

Divider主要用于显示水平分割线

Widget build(BuildContext context) {
  return Center(
    child: Column(
      children: <Widget>[
        Expanded(
          child: Container(
            color: Colors.amber,
            child: const Center(
              child: Text('Above'),
            ),
          ),
        ),
        const Divider(
          height: 20,
          thickness: 5,
          indent: 20,
          endIndent: 20,
        ),
        // Subheader example from Material spec.
        // https://material.io/components/dividers#types
        Container(
          padding: const EdgeInsets.only(left: 20),
          child: Align(
            alignment: AlignmentDirectional.centerStart,
            child: Text(
              'Subheader',
              style: Theme.of(context).textTheme.caption,
              textAlign: TextAlign.start,
            ),
          ),
        ),
        Expanded(
          child: Container(
            color: Theme.of(context).colorScheme.primary,
            child: const Center(
              child: Text('Below'),
            ),
          ),
        ),
      ],
    ),
  );
}