无法在flutter应用程序中更改状态栏图标亮度？

Question

在 main.dart

void main() {
SystemChrome.setSystemUIOverlayStyle(
SystemUiOverlayStyle(
  statusBarColor: Colors.black.withOpacity(0), //top bar color
  statusBarIconBrightness: Brightness.dark, //top bar icons
  systemNavigationBarColor: Colors.black, //bottom bar color
  systemNavigationBarIconBrightness: Brightness.light, //bottom bar icons
),
);
runApp(MyApp());
}

class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
 Widget build(BuildContext context) {
return MaterialApp(
  theme: ThemeData(
    //primaryColor: Color.fromRGBO(113, 201, 206, 1),
    fontFamily: 'Montserrat',
    textTheme: TextTheme(
      headline: TextStyle(
        fontSize: 40,
        fontWeight: FontWeight.w500,
      ),
      title: TextStyle(
        fontWeight: FontWeight.w700,
        fontSize: 16,
      ),
      body1: TextStyle(
        fontSize: 12,
      ),
    ),
  ),
  home: Test(),
  routes: {
    MainScreen.routeName: (context) => MainScreen(),
  },
);
}
}

我是用上面的代码改变状态栏的颜色，statusBarIconBrightness: Brightness.dark没有效果。它变成黑色，但几秒钟后又切换回“Brightness.light”。怎么了？

在 Android 模拟器上运行。我不想有appBarintTest()小部件。

Answer 1

那是因为你没有明确改变AppBar的brightness你的Test页面。运行此代码并查看差异：

void main() {
  SystemChrome.setSystemUIOverlayStyle(
    SystemUiOverlayStyle(
      statusBarColor: Colors.black.withOpacity(0), //top bar color
       // statusBarIconBrightness: Brightness.dark, // don't use this
    ),
  );
  runApp(MyApp2());
}

class MyApp2 extends StatelessWidget {
// This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("AppBar"),
          brightness: Brightness.light, // use this instead
        ),
      ),
    );
  }
}

输出 1（亮度.暗）：

输出 2（亮度.光）：