1、更換主題
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,
??????theme:?new?ThemeData(
????????brightness:?Brightness.dark,
????????primaryColor:?Colors.lightBlue[800],
????????accentColor:?Colors.cyan[600],
??????),
??????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,
??????????child:?new?Text(
????????????'Text?with?a?background?color',
????????????style:?Theme.of(context).textTheme.title,
??????????),
????????),
??????),
??????floatingActionButton:?new?Theme(
????????data:?Theme.of(context).copyWith(accentColor:?Colors.yellow),
????????child:?new?FloatingActionButton(
??????????onPressed:?null,
??????????child:?new?Icon(Icons.add),
????????),
??????),
????);
??}
}
2鳞滨、
