如何在提交reCAPTCHA时在WebView中添加JavaScript函数并稍后从HTML调用它 [英] How to add a JavaScript function in WebView and call it later from HTML upon submitting reCAPTCHA

问题描述

我正在像这样的WebView中添加JavaScript函数(科特琳):

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

val webView = findViewById(R.id.webview) as WebView
webView.getSettings().setJavaScriptEnabled(true)
webView.addJavascriptInterface(this, "android")
webView.getSettings().setBuiltInZoomControls(false)
webView.loadUrl(url)

webView.webViewClient = object : WebViewClient() {
    override fun onPageFinished(view: WebView, url: String) {
        super.onPageFinished(view, url)
        webView.loadUrl("javascript:(function captchaResponse (token){" +
                        "      android.reCaptchaCallbackInAndroid(token);" +
                        "    })()")
    }
}

该函数运行良好，但是问题是，当我在WebView中添加它时，它可以立即运行.我只想将其包含为JavaScript函数，并且当用户填写reCAPTCHA时，只能从HTML调用它.我该怎么办?

The function works fine, but the problem is that it runs immediately, when I add it in WebView. I only want to include it as a JavaScript function and it should be called only from the HTML, when the user will fill the reCAPTCHA. How can I do that?

推荐答案

尝试像这样注入脚本，

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

现在调用类似的函数

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

现在是exec loadurl，

now exec loadurl like,

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

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