How to add a JavaScript function in WebView and call it later from HTML upon submitting reCAPTCHA

Question

I am adding a JavaScript function in WebView like this (Kotlin):

val webView = findViewById(R.id.webview) as WebView
webView.getSettings().setJavaScriptEnabled(t         


        

Answer 1

Try injecting the script like this,

function addCode(code){
var addedScript= document.createElement('script');
addedScript.text= code;
document.body.appendChild(addedScript);}

now call the function like,

val codeToExec = "function captchaResponse (token){" +
                    "android.reCaptchaCallbackInAndroid(token);" +
                    "}";

now exec loadurl like,

webview.loadUrl("javascript:(function addCode(code){
var addedScript= document.createElement('script');
addedScript.text= code;
document.body.appendChild(addedScript);})(codeToExec));