编辑为Flutter 2.0.0

当你在屏幕上有一个应用程序栏时，下面的答案就不再适用了。现在需要配置AppBarTheme。亮度和AppBarTheme。在这种情况下，systemOverlayStyle正确。

回答

而不是经常建议SystemChrome.setSystemUIOverlayStyle()，这是一个系统范围的服务，不会在不同的路由上重置，你可以使用AnnotatedRegion<SystemUiOverlayStyle>，这是一个小部件，只对你包装的小部件有效。

AnnotatedRegion<SystemUiOverlayStyle>(
   value: SystemUiOverlayStyle(
      statusBarColor: Colors.white,
  ),
  child: Scaffold(
      ...
  ),
)

@override
Widget build(BuildContext context) {
  return Theme(
    data: ThemeData(brightness: Brightness.dark),
    child: Scaffold()
    ....
  )
}

使用AnnotatedRegion是最适合我的，特别是如果我没有AppBar

import 'package:flutter/services.dart';

...

Widget build(BuildContext context) {
   return Scaffold(
      body: AnnotatedRegion<SystemUiOverlayStyle>(
         value: SystemUiOverlayStyle.light,                
         child: ...,
      ),
   );
}

如果你想改变整个应用程序的状态颜色，你可以像这样使用primaryColorDark属性:

void main() {
  runApp(
    MaterialApp(
      home: HomeWidget(),
      theme: ThemeData(
        primaryColorDark: Colors.white,
      ),
    ),
  );
}

使用这种方法使你的状态栏完全白色的状态栏图标， 我个人使用它!在android上测试工作很好!

import 'package:FileSharing/bodypage.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
          // This is the theme of your application.
          //
          // Try running your application with "flutter run". You'll see the
          // application has a blue toolbar. Then, without quitting the app, try
          // changing the primarySwatch below to Colors.green and then invoke
          // "hot reload" (press "r" in the console where you ran "flutter run",
          // or simply save your changes to "hot reload" in a Flutter IDE).
          // Notice that the counter didn't reset back to zero; the application
          // is not restarted.
          primarySwatch: Colors.blue,
          appBarTheme: AppBarTheme(
            color: Colors.white,
            elevation: 0,
            brightness: Brightness.light,
            centerTitle: true,
            iconTheme: IconThemeData(
              color: Colors.black,
            ),
            textTheme: TextTheme(),
          )

          // This makes the visual density adapt to the platform that you run
          // the app on. For desktop platforms, the controls will be smaller and
          // closer together (more dense) than on mobile platforms.
          ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
      statusBarColor: Colors.white,
    ));
    return Scaffold(
      appBar: AppBar(
        brightness: Brightness.light,
        actions: [
          Container(
            width: 63,
            padding: EdgeInsets.only(right: 30),
            child: FloatingActionButton(
              onPressed: null,
              backgroundColor: Colors.pink,
              elevation: 8,
              child: Icon(Icons.person_pin),
            ),
          )
        ],
      ),
    );
  }
}

你可以在Android上使用:

 import 'package:flutter/services.dart';

void main() {
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
    systemNavigationBarColor: Colors.blue, // navigation bar color
    statusBarColor: Colors.pink, // status bar color
  ));
}