class TestActivity : Activity() {

    class JsInterface {
        @JavascriptInterface
        fun kek() {
            Log.d(TAG, "TOPKEK")
        }
    }

    override fun onCreate(save: Bundle?) {
        super.onCreate(save)

        frameLayout {
            webView {
                settings.javaScriptEnabled = true
                addJavascriptInterface(JsInterface(), "Android")
                loadUrl("javascript:Android.kek()")
            }
        }

    }

}