Question

解决方案必须适用于API> 20
This solution does not work。我认为它仅适用于较低版本的Android API。我正在Android 8.0上进行测试。

我已经尝试在页面加载后立即使用Retrofit，而不是通过WebViewClient获取html。但是用户未登录改造请求。然后我两次执行相同的请求。

@SuppressLint("JavascriptInterface")
private fun initializeWebView(url : String?) {
    binding.webView.loadUrl(url)
    binding.webView.settings.javaScriptEnabled = true
    binding.webView.settings.useWideViewPort = true
    binding.webView.requestFocus(View.FOCUS_DOWN)
    binding.webView.addJavascriptInterface(MyJavaScriptInterface(context!!), "HtmlViewer");

    binding.webView.webViewClient = object : WebViewClient() {
        override fun shouldOverrideUrlLoading(view: WebView, request: WebResourceRequest): Boolean {
            return false
        }

        override fun onPageFinished(view: WebView?, url: String?) {
//              super.onPageFinished(view, url)

        //tried adding a sleep, but doesn't work:
        Thread.sleep(6000)

               //showHTML method is not being called:                
 binding.webView.loadUrl("javascript:window.HtmlViewer.showHTML" +
                    "('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');")

 // Prints out: html: null
            binding.webView.evaluateJavascript(
                    "javascript:window.HtmlViewer.showHTML" +
                            "('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');"
            ) { html ->
                Log.d("HTML", html)
                // code here
            }
        }
    }
}


class MyJavaScriptInterface(val context: Context) {

  fun showHTML(html: String) {
    Log.d("",""+html)

    AlertDialog.Builder(context).setTitle("HTML").setMessage(html)
      .setPositiveButton(android.R.string.ok, null).setCancelable(false).create().show()  }
}

如何获取android webViewClient的原始HTML响应

0 个答案: