Initial load of Status Bar does not respect react-native useColorScheme hook

[vikrvm]

Bug summary

So after going through the setup docs and getting things working, everything works just fine. The only thing I noticed is the initial load does not respect what color is set for the user's device. For example my current code:

const isDarkMode = useColorScheme() === 'dark';

<SystemBars
  animated={true}
  barStyle={isDarkMode ? 'light-content' : 'dark-content'}
/>

https://user-images.githubusercontent.com/6226652/191576643-436aad71-ee4f-46d8-8a6a-f1912ae5fde3.mov

Is there a fix to allow the <SystemBars /> initial styles to be relevant to the useColorScheme hook?

Library version

1.2.2

Environment info

System:
    OS: macOS 13.0
    CPU: (10) arm64 Apple M1 Max
    Memory: 1.44 GB / 32.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.9.0 - /opt/homebrew/bin/node
    Yarn: 1.22.18 - ~/.yarn/bin/yarn
    npm: 8.19.1 - /opt/homebrew/bin/npm
    Watchman: Not Found
  Managers:
    CocoaPods: 1.11.3 - /Users/vikrampal/.rbenv/shims/pod
  SDKs:
    iOS SDK:
      Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0
    Android SDK: Not Found
  IDEs:
    Android Studio: 2021.2 AI-212.5712.43.2112.8815526
    Xcode: 14.0/14A309 - /usr/bin/xcodebuild
  Languages:
    Java: 18.0.2 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.1.0 => 18.1.0 
    react-native: 0.70.1 => 0.70.1 
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

Steps to reproduce

Steps show in the sample code.

Reproducible sample code

MainActivity.java

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    RNBootSplash.init(this);
    super.onCreate(null);
    RNBars.init(this, "light-content");
  }

values/styles.xml

<resources>

    <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <item name="android:editTextBackground">@drawable/rn_edit_text_material</item>

        <!-- Allow drawing under the system bars background -->
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:fitsSystemWindows">false</item>

        <!-- Set status bar background transparent -->
        <item name="android:statusBarColor">@android:color/transparent</item>

        <!-- Navigation bar will stay translucent on Android < 8.1 -->
        <item name="android:windowTranslucentNavigation">true</item>
    </style>

    <!-- BootTheme should inherit from Theme.SplashScreen -->
    <style name="BootTheme" parent="Theme.SplashScreen">
        <item name="windowSplashScreenBackground">@color/bootsplash_background</item>
        <item name="windowSplashScreenAnimatedIcon">@mipmap/bootsplash_logo</item>
        <item name="postSplashScreenTheme">@style/AppTheme</item>

        <!-- Status bar initial style: true = dark-content, false = light-content -->
        <item name="android:windowLightStatusBar">true</item>

        <!-- Navigation bar will stay translucent on Android < 8.1 -->
        <item name="android:windowTranslucentNavigation">true</item>
    </style>

</resources>

values-v27/styles.xml

<resources xmlns:tools="http://schemas.android.com/tools">

    <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <item name="android:editTextBackground">@drawable/rn_edit_text_material</item>

        <!-- Allow drawing under the system bars background -->
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:fitsSystemWindows">false</item>

        <!-- Set system bars background transparent -->
        <item name="android:statusBarColor">@android:color/transparent</item>
        <item name="android:navigationBarColor">@android:color/transparent</item>

        <!-- Disable auto contrasted system bars background -->
        <item name="android:enforceStatusBarContrast" tools:targetApi="q">false</item>
        <item name="android:enforceNavigationBarContrast" tools:targetApi="q">false</item>
    </style>

    <!-- BootTheme should inherit from Theme.SplashScreen -->
    <style name="BootTheme" parent="Theme.SplashScreen">
        <item name="windowSplashScreenBackground">@color/bootsplash_background</item>
        <item name="windowSplashScreenAnimatedIcon">@mipmap/bootsplash_logo</item>
        <item name="postSplashScreenTheme">@style/AppTheme</item>

        <!-- Bars initial styles: true = dark-content, false = light-content -->
        <item name="android:windowLightStatusBar">true</item>
        <item name="android:windowLightNavigationBar">true</item>
    </style>

</resources>

[zoontek]

That's normal, since at start the JS has to be loaded, parsed and executed first. If you want to support dark mode, you can duplicate your xml files and add a night suffix to the directory (ex: values-night, values-night-v27). More infos: https://developer.android.com/develop/ui/views/theming/darktheme

[batuhansahan]

@zoontek hey since i want to support both light and dark theme at the startup. I found a solution can you check it out. Its working without JS code. Do you think its a good idea doing like this.

Code

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    RNBootSplash.init(this);
    super.onCreate(null);

    int currentNightMode = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
    if (currentNightMode == Configuration.UI_MODE_NIGHT_YES) {
      RNBars.init(this, "light-content");
    } else {
      RNBars.init(this, "dark-content");
    }
  }

[zoontek]

@batuhansahan It works yeah. Don't forget to also create a dedicated values-night-xxx.xml file too.