Polyfill for `Appearance` API which will be available in `react-native@0.62`.
npm install react-native-appearanceAccess operating system appearance information on iOS, Android, and web. Currently supports detecting preferred color scheme (light/dark).
Installation instructions vary depending on whether you're using a managed Expo project or a bare React Native project.
This library is supported in Expo SDK 35+ (SDK 35 includes iOS support, SDK 36 and higher includes support for all platforms).
``sh`
expo install react-native-appearance
> Android support and web support are available on SDK36+.
`sh`
yarn add react-native-appearance
> If you are not using AndroidX on your project already (this is the default on React Native 0.60+, but not on lower versions) you will want to use the jetifier npm package. Install the package with yarn add -D jetifier and then under scripts add "postinstall": "jetify -r". Next run yarn jetify.
After installing the package you need to link the native parts of the library for the platforms you are using. The easiest way to link the library is using the CLI tool by running this command from the root of your project:
`sh`
react-native link react-native-appearance
If you can't or don't want to use the CLI tool, you can also manually link the library using the instructions below (click on the arrow to show them):
Manually link the library on iOS
Either follow the instructions in the React Native documentation to manually link the framework or link using Cocoapods by adding this to your Podfile:
`ruby`
pod 'react-native-appearance', :path => '../node_modules/react-native-appearance'
Manually link the library on Android
1. Open up android/app/src/main/java/[...]/MainApplication.java
- Add import io.expo.appearance.RNCAppearancePackage; to the imports at the top of the filenew RNCAppearancePackage()
- Add to the list returned by the getPackages() method
2. Append the following lines to android/settings.gradle:
`
include ':react-native-appearance'
project(':react-native-appearance').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-appearance/android')
`
3. Insert the following lines inside the dependencies block in android/app/build.gradle:
`
implementation project(':react-native-appearance')
iOS configuration
In Expo managed projects, add ios.userInterfaceStyle to your app.json:
`json`
{
"expo": {
"ios": {
"userInterfaceStyle": "automatic"
}
}
}
In bare React Native apps, you can configure supported styles with the UIUserInterfaceStyle key in your app Info.plist.
Android configuration
Add the uiMode flag in AndroidManifest.xml:
`xml`
android:configChanges="keyboard|keyboardHidden|orientation|screenSize|uiMode">
Implement the onConfigurationChanged method in MainActivity.java:
`java
import android.content.Intent; // <--- import
import android.content.res.Configuration; // <--- import
public class MainActivity extends ReactActivity {
......
// copy these lines
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Intent intent = new Intent("onConfigurationChanged");
intent.putExtra("newConfig", newConfig);
sendBroadcast(intent);
}
......
}
`
First, you need to wrap your app in the AppearanceProvider. At the root of your app, do the following:
`js
import { AppearanceProvider } from 'react-native-appearance';
export default () => (
);
`
Now you can use Appearance and useColorScheme anywhere in your app.
`js
import { Appearance, useColorScheme } from 'react-native-appearance';
/**
* Get the current color scheme
*/
Appearance.getColorScheme();
/**
* Subscribe to color scheme changes with a hook
*/
function MyComponent() {
const colorScheme = useColorScheme();
if (colorScheme === 'dark') {
// render some dark thing
} else {
// render some light thing
}
}
/**
* Subscribe to color scheme without a hook
*/
const subscription = Appearance.addChangeListener(({ colorScheme }) => {
// do something with color scheme
});
// Remove the subscription at some point
subscription.remove()
``
This was mostly written by Facebook for inclusion in React Native core.