In the previous post we’ve looked at how we can add Dark Theme support to our app.
Full of hope you tried to test your app and everything went well until you stumble upon a Webview…
By default Webview will assume Light theme version, breaking your dark theme user experience.

Terrible, I know - fortunately for you I’m going to look at how to add Dark Theme support to Webview as well.


First of all you need to add android.webkit dependency into your project


dependencies {
    implementation "androidx.webkit:webkit:1.3.0"

At the time of writing this post the latest stable version of webkit is 1.3.0.
It is worth noting that the Dark Theme support has been added with version 1.2.0, before this version it was impossible to add Dark Theme support to Webview.

Next step would be to check whether Webview and Android framework on user’s device supporting theming:

if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {

Please note that WebViewFeature.FORCE_DARK is only supported starting with Webview version 76. Unfortunately before that version there is no straightforward way to support the dark theming.
If you own the contents displayed within the Webview you might want to implement your custom CSS themes and toggle them using @JavascriptInterface from your app.

If WebViewFeature.FORCE_DARKis supported we can choose from three available options:

  • FORCE_DARK_OFF - Disable dark theme, the content will be rendered in default Light Theme
  • FORCE_DARK_ON - Enable dark theme, the content will be rendered in Dark Theme
  • FORCE_DARK_AUTO - Enable dark theme based on the state of parent view

Then we need to apply the setting using WebSettingsCompat

WebSettingsCompat.setForceDark(webView.settings, WebSettingsCompat.FORCE_DARK_ON)

That’s all really, now when testing your app you should see a cool Dark Themed Webview.