效果图：
代码+注释：
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appName = 'Custom Themes';
return new MaterialApp(
title: appName,
//创建主题
theme: new ThemeData(
brightness: Brightness.dark, //亮度
primaryColor: Colors.lightBlue[800], //主题颜色
accentColor: Colors.cyan[600], //其他颜色
),
home: new MyHomePage(
title: appName,
),
);
}
}
class MyHomePage extends StatelessWidget {
final String title;
MyHomePage({Key key, @required this.title}) : super(key: key);
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(title),
),
body: new Center(
child: new Container(
color: Theme.of(context).accentColor, //引用主题
child: new Text(
'Text with a background color',
style: Theme.of(context).textTheme.title,
),
),
),
);
}
}
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代码+注释：
import 'package:flutter/foundation.d
