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I would like to preemptively get the HTML code of a webpage that is to be loaded in a webView, parse it using regex, and display only the HTML code that I want, while letting the webpage still think it has loaded everything.
Is there any way to do that in the WebViewClient.onLoadResource() or similar methods?
EDIT: I tried this:
class MyJavaScriptInterface { @SuppressWarnings("unused") public void showHTML(String html, Context context) { new AlertDialog.Builder(context) .setTitle("HTML") .setMessage(html) .setPositiveButton(android.R.string.ok, null) .setCancelable(false) .create(); pageHTML = html; } } @Override public void customizeWebView(final ServiceCommunicableActivity activity, final WebView webview, final SearchResult mRom) { mRom.setFileSize(getFileSize(mRom.getURLSuffix())); webview.getSettings().setJavaScriptEnabled(true); MyJavaScriptInterface interfaceA = new MyJavaScriptInterface(); webview.addJavascriptInterface(interfaceA, "HTMLOUT"); WebViewClient anchorWebViewClient = new WebViewClient() { @Override public void onPageFinished(WebView view, String url) { /* This call inject JavaScript into the page which just finished loading. */ webview.loadUrl("javascript:window.HTMLOUT.showHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');"); Pattern pattern = Pattern.compile("<h2>Winning Sc.+</h2></div>(.+)<br>", Pattern.DOTALL); Matcher matcher = pattern.matcher(pageHTML); matcher.find(); The interface is never called
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Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main. xml. In the above code, we have taken web view to show html content.
Yes you can, you can use javascript to get webpage content. Then use the webview jsInterface to return the content to you java code.
Had to use HttpClient. no cookies required, just parsing for html:
private String getDownloadButtonOnly(String url){ HttpGet pageGet = new HttpGet(url); ResponseHandler<String> handler = new ResponseHandler<String>() { public String handleResponse(HttpResponse response) throws ClientProtocolException, IOException { HttpEntity entity = response.getEntity(); String html; if (entity != null) { html = EntityUtils.toString(entity); return html; } else { return null; } } }; pageHTML = null; try { while (pageHTML==null){ pageHTML = client.execute(pageGet, handler); } } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } Pattern pattern = Pattern.compile("<h2>Direct Down.+?</h2>(</div>)*(.+?)<.+?>", Pattern.DOTALL); Matcher matcher = pattern.matcher(pageHTML); String displayHTML = null; while(matcher.find()){ displayHTML = matcher.group(); } return displayHTML; } @Override public void customizeWebView(final ServiceCommunicableActivity activity, final WebView webview, final SearchResult mRom) { mRom.setFileSize(getFileSize(mRom.getURLSuffix())); webview.getSettings().setJavaScriptEnabled(true); WebViewClient anchorWebViewClient = new WebViewClient() { @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { super.onPageStarted(view, url, favicon); String downloadButtonHTML = getDownloadButtonOnly(url); if(downloadButtonHTML!=null && !url.equals(lastLoadedURL)){ lastLoadedURL = url; webview.loadDataWithBaseURL(url, downloadButtonHTML, null, "utf-8", url); } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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