Change color of system navigation and status bar when entering the dark mode in flutter

Question

I want to change the color of the system navigation and status bar when entering the dark mode.

This is my code:

void main() async {
SystemChrome.setSystemUIOverlayStyle(
SystemUiOverlayStyle(
  statusBarBrightness: Brightness.dark,
  statusBarColor: Colors.white,
  statusBarIconBrightness: Brightness.dark,
  systemNavigationBarColor: Colors.white,
  systemNavigationBarDividerColor: Colors.white,
  systemNavigationBarIconBrightness: Brightness.dark,
),
);
...
}

I use SystemChrome and it works fine. But my problem is, I can only change the color manual via code, not when switching to dark or light mode or when I use the system settings.

Where are you testing it, I mean device web? And why not use themeMode on MaterialApp ? — Md. Yeasin Sheikh
– Md. Yeasin Sheikh, Commented Oct 16, 2021 at 18:50
It is an android application and I also use a themeMode inside my MaterialApp for changing dark and light mode. This works, but I can not figure out, how to do the same for the navigation and status bar. — Вадим
– Вадим, Commented Oct 16, 2021 at 21:07

Вадим · Accepted Answer · 2021-10-18 15:38:18Z

After trying many things, I found the following solution to my problem. I don't know if it's the cleanest solution, but it works. This solution is interesting for those who don't use an AppBar like in my case.

The trick is as follows ...

@override
Widget build(BuildContext context) {
 Theme.of(context).scaffoldBackgroundColor == Colors.white
    ? _lightStatusAndNavigationBar()
    : _darkStatusAndNavigationBar();
return Scaffold(
      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
...
}

The query is in the build of my class, in which I have the NavigationBar of my app. All other screens are connected there.

Using Theme.of (context) .scaffoldBackgroundColor, I ask which design should be used for the status and navigation bar.

These are the two functions for the different colors:

void _darkStatusAndNavigationBar() {
SystemChrome.setSystemUIOverlayStyle(
  SystemUiOverlayStyle(
    statusBarBrightness: Brightness.light,
    statusBarColor: Colors.grey.shade900,
    statusBarIconBrightness: Brightness.light,
    systemNavigationBarColor: Colors.grey.shade900,
    systemNavigationBarDividerColor: Colors.grey.shade900,
    systemNavigationBarIconBrightness: Brightness.light,
  ),
);
}

 void _lightStatusAndNavigationBar() {
SystemChrome.setSystemUIOverlayStyle(
  SystemUiOverlayStyle(
    statusBarBrightness: Brightness.dark,
    statusBarColor: Colors.white,
    statusBarIconBrightness: Brightness.dark,
    systemNavigationBarColor: Colors.white,
    systemNavigationBarDividerColor: Colors.white,
    systemNavigationBarIconBrightness: Brightness.dark,
  ),
);
}

If something is still incomprehensible, just ask. :)

cvsrt · Accepted Answer · 2021-10-16 19:33:53Z

1

You can change the theme like this.

MaterialApp(
    themeMode: ThemeMode.light, // Change it as you want
    theme: ThemeData(
        primaryColor: Colors.white,
        primaryColorBrightness: Brightness.light,
        brightness: Brightness.light,
        primaryColorDark: Colors.black,
        canvasColor: Colors.white,
        // next line is important!
        appBarTheme: AppBarTheme(brightness: Brightness.light)),
    darkTheme: ThemeData(
        primaryColor: Colors.black,
        primaryColorBrightness: Brightness.dark,
        primaryColorLight: Colors.black,
        brightness: Brightness.dark,
        primaryColorDark: Colors.black,      
        indicatorColor: Colors.white,
        canvasColor: Colors.black,
        // next line is important!
        appBarTheme: AppBarTheme(brightness: Brightness.dark)),
...

answered Oct 16, 2021 at 19:33

cvsrt

3876 silver badges21 bronze badges

2 Comments

Вадим Over a year ago

Thanks for your code. I am doing it exactly this way how you show it. But I found out, that inside my app only the SystemChrome function works for all screens. But sure, I will try this out and will give feedback. :)

Вадим Over a year ago

The problem is. I do not use an appBar inside my app. In no screen. And I will change the color of the StatusBar and the NavigationBar of the system. It should look like on Instagram. The hole screen should be covered with the background color.

Blehi · Accepted Answer · 2023-05-12 14:25:29Z

Consider using an AnnotatedRegion widget.

@override
Widget build(BuildContext context) {
    return AnnotatedRegion<SystemUiOverlayStyle>(
        value: getSystemUIOverlayStyle(context),
        child: Scaffold(
            appBar: _appBar(context),
            body: _body(context),
        ),
    );
}

And the getSystemUIOverlayStyle method based of context.

SystemUiOverlayStyle getSystemUIOverlayStyle(BuildContext context) {
    final theme = Theme.of(context);
    return SystemUiOverlayStyle(
      systemNavigationBarColor: theme.colorScheme.surface,
      systemNavigationBarDividerColor: theme.colorScheme.surface,
      systemNavigationBarIconBrightness: theme.brightness == Brightness.light ? Brightness.dark : Brightness.light,
    );
}

More details https://api.flutter.dev/flutter/services/SystemChrome/setSystemUIOverlayStyle.html

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