FlatButton 扁平按钮 （点击时会产生阴影效果）

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "FlatButton 扁平按钮组件",
      home: Scaffold(
        appBar: AppBar(
          title: Text("FlatButton 扁平按钮组件"),
        ),
        body: Center(
          child: FlatButton(
            onPressed: () {},
            child: Text(
              "FlatButton 扁平按钮",
              style: TextStyle(fontSize: 24.0),
            ),
          ),
        ),
      ),
    );
  }
}