我正在尝试改变状态栏的颜色为白色。我偶然发现了这家酒吧。我尝试在我的dart文件中使用示例代码。
当前回答
现有的解决方案对我没有帮助,因为我不使用AppBar,而且我不想在用户切换应用程序主题时做出声明。我需要一种反应式的方式来切换亮暗模式,发现AppBar使用了一个名为Semantics的小部件来设置状态栏的颜色。
基本上,我是这样做的:
return Semantics(
container: false, // don't make it a new node in the hierarchy
child: AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle.light, // or .dark
child: MyApp(), // your widget goes here
),
);
语义从package:flutter/material.dart导入。 SystemUiOverlayStyle从package:flutter/services.dart导入。
其他回答
大多数答案都是使用只适用于安卓系统的SystemChrome。我的解决方案是将AnnotatedRegion和SafeArea合并到新的小部件中,这样它也可以在iOS中工作。我可以在没有AppBar的情况下使用它。
class ColoredStatusBar extends StatelessWidget {
const ColoredStatusBar({
Key key,
this.color,
this.child,
this.brightness = Brightness.dark,
}) : super(key: key);
final Color color;
final Widget child;
final Brightness brightness;
@override
Widget build(BuildContext context) {
final defaultColor = Colors.blue;
final androidIconBrightness =
brightness == Brightness.dark ? Brightness.light : Brightness.dark;
return AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle(
statusBarColor: color ?? defaultColor,
statusBarIconBrightness: androidIconBrightness,
statusBarBrightness: brightness,
),
child: Container(
color: color ?? defaultColor,
child: SafeArea(
bottom: false,
child: Container(
child: child,
),
),
),
);
}
}
用法:把它放在页面小部件的顶部。
@override
Widget build(BuildContext context) {
return ColoredStatusBar(
child: /* your child here */,
);
}
首先你要导入这一行:
import 'package:flutter/services.dart';
然后你可以在main中使用下面这一行代码。飞镖文件
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
systemNavigationBarColor: Colors.amber, // navigation bar color
statusBarColor: Colors.white, // status bar color
statusBarIconBrightness: Brightness.dark, // status bar icon color
systemNavigationBarIconBrightness: Brightness.dark, // color of navigation controls
));
注意:如果你沿着这个陡坡走。因此你可以控制整个屏幕。但是如果你控制单个屏幕状态栏的颜色,那么你可以试试这个…
import 'package:flutter/services.dart';
Widget build(BuildContext context) {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
systemNavigationBarColor: Colors.transparent,
));
}
这招对我很管用:
进口服务
导入的包:颤振/ services.dart ';
然后添加:
@override
Widget build(BuildContext context) {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
statusBarColor: Colors.white,
statusBarBrightness: Brightness.dark,
));
return MaterialApp(home: Scaffold(
没有一个答案似乎提到,你可以在你的主MaterialApp小部件ThemeData函数。
return MaterialApp(
theme: ThemeData(
appBarTheme: const AppBarTheme(
systemOverlayStyle: SystemUiOverlayStyle(
statusBarColor: Colors.white,
),
),
),
),
这也可以在darkTheme ThemeData中完成。
完整的示例
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
debugShowCheckedModeBanner: false,
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return AnnotatedRegion<SystemUiOverlayStyle>(
value: const SystemUiOverlayStyle(
systemNavigationBarColor: Colors.red, // navigation bar color
systemNavigationBarIconBrightness: Brightness.light, //navigation bar icons' color
),
child: Scaffold(
appBar: AppBar(
backgroundColor: Colors.red,
title: const Text('data'),
systemOverlayStyle: SystemUiOverlayStyle.dark.copyWith(
statusBarColor: Colors.red,
statusBarIconBrightness: Brightness.light,
),
),
),
);
}
}