This library helps you to set your WebView background to dark in Dark Theme mode.

Add the dependency to your app level build.gradle

dependencies {
	implementation 'io.github.kakyire:webview-theme:1.0.0'
}

dependencies{
implementation("io.github.kakyire:webview-theme:1.0.0")
}

In your activity or fragment add this single line of code

webView.setWebViewDarkTheme()