1. import 'package:flutter/material.dart';
    2. // import 'package:english_words/english_words.dart';
    4. void main() => runApp(new MyApp());
    6. class MyApp extends StatelessWidget {
    7.   @override
    8.   Widget build(BuildContext context) {
    9.     return new MaterialApp(
    10.       title: 'Welcome to Flutter',
    11.       home: new Scaffold(
    12.         appBar: new AppBar(
    13.           title: new Text('Welcome to Flutter12'),
    14.         ),
    15.         body: Column(
    16.           children: [
    17.             RaisedButton(
    18.               child: Text('RaisedButton'),
    19.               onPressed: () => {
    20.               print('测试机哦')
    21.             }),
    22.             FlatButton(
    23.               onPressed: () => {
    24.                 print('FlatButton')
    25.               },
    26.               child: Text('FlatButton')
    27.             ),
    28.             OutlineButton(
    29.               onPressed: () => {
    30.                 print('OutlineButton')
    31.               },
    32.               child: Text('OutlineButton'),
    33.               color: Colors.redAccent,
    34.               textColor: Colors.blue,
    35.               highlightColor: Colors.amberAccent,
    36.               shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10.0)),
    37.             )
    38.           ],
    39.         ),
    40.       ),
    41.     );
    42.   }
    43. }

    https://www.jianshu.com/p/f06cc6c74d20