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Android WebView Intercept iframe Tag Internal Jump Tutorial

  • 2021-11-30 01:25:50
  • OfStack

Recently, there is an advertisement space in the project that needs to be dynamically configured. In the background, a code of html nested iframe label is given, and Android is required to intercept the jump inside iframe and handle it by itself.

For example, the following is a section of html code, nested with this iframe tag, and src is the jump address. Now I will intercept when you click on this website, and do my own processing instead of jumping. 


<html> 
<iframe src="https://www.ofstack.com/" frameborder='0' scrolling='no' width='100%' height='300'>
</iframe>
</html>

oh, this is the first time I know the iframe tag, but I thought it should be similar to intercepting h5 normally, so I started to code with great interest, but no matter how to configure WebView or rewrite shouldOverrideUrlLoading, I just can't intercept the website in iframe. . . Later, I studied (bai) and (du) for a long time, and finally intercepted it.

Implementation method:

First of all, your WebView needs setWebViewClient, rewrite 


public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {}  Method, and then setWebChromeClient , rewrite onCreateWindow Method, in which you create a new WevView, Join to webView In, for the new one webView setWebViewClient , and then rewrite shouldVeerrideUrlLoading Method, intercept here. 
  webView.setWebChromeClient(new WebChromeClient(){
   
   @Override
   public boolean onCreateWindow(WebView webView, boolean isDialog, boolean isUserGesture, Message resultMsg) {
    WebView newWebView = new WebView(getActivity());
    webView.addView(newWebView);
 
    WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
    transport.setWebView(newWebView);
    resultMsg.sendToTarget();
 
    newWebView.setWebViewClient(new WebViewClient(){
 
     @Override
     public boolean shouldOverrideUrlLoading(WebView webView, String url) {
      //TODO  Implement your interception method here 
      if (url.contains("https://www.ofstack.com")){
       toast(" Intercepted " + url);
       Intent intent = new Intent(getActivity(), CommonWebViewActivity.class);
       intent.putExtra("url",url);
       startActivity(intent);
 
      }else {
       webView.loadUrl(url);
      }
      return true;
     }
    });
 
    return true;
   }
  });

The complete code is as follows: 


private void initWebView(WebView webView) {
  // Enable support javascript
  WebSettings settings = webView.getSettings();
  settings.setJavaScriptEnabled(true);
  settings.setJavaScriptCanOpenWindowsAutomatically(true);
  settings.setSupportZoom(false); // Support for Zoom 
  settings.setBuiltInZoomControls(false); // Support gesture scaling 
  settings.setDisplayZoomControls(false); // Whether to display the zoom button 
  settings.setDefaultTextEncodingName("utf-8"); // Set text encoding 
  settings.setUseWideViewPort(false); // Adjust the picture to fit WebView The size of 
  settings.setLoadWithOverviewMode(true); // Adaptive screen 
  settings.setDomStorageEnabled(true);
  settings.setSaveFormData(true);
  settings.setSupportMultipleWindows(true);
  settings.setAppCacheEnabled(true);
  settings.setPluginState(WebSettings.PluginState.ON);// Support plug-ins 
  settings.setCacheMode(WebSettings.LOAD_NO_CACHE); // Cache is not applicable 
  settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);// Support content relayout 
  webView.setOverScrollMode(View.OVER_SCROLL_NEVER); //  Cancel WebView Shadow when scrolling or dragging to the top and bottom in 
  webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY); //  Cancel the white edge effect of scroll bar 
  // >= 19(SDK4.4) Start hardware acceleration, otherwise start software acceleration 
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
   webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
   settings.setLoadsImagesAutomatically(true); // Support automatic loading of pictures 
  } else {
   webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
   settings.setLoadsImagesAutomatically(false);
  }
 
  webView.setWebViewClient(new WebViewClient() {
   @Override
   public void onLoadResource(WebView view, String url) {
    super.onLoadResource(view, url);
    Log.w("webView==onLoadResource===url=" + url);
   }
 
   @Override
   public void onReceivedSslError(WebView webView, SslErrorHandler sslErrorHandler, SslError sslError) {
    sslErrorHandler.proceed(); //  Accept certificates from all websites 
   }
 
   @Override
   public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
    
    if (request.getUrl().toString().contains("http://www.baidu.com")){
     toast(" Intercepted baidu");
     
    }else {
     webView.loadUrl(request.getUrl().toString());
    }
 
    return true;
   }
  });
 
  webView.setWebChromeClient(new WebChromeClient(){
   
   @Override
   public boolean onCreateWindow(WebView webView, boolean isDialog, boolean isUserGesture, Message resultMsg) {
    WebView newWebView = new WebView(getActivity());
    webView.addView(newWebView);
 
    WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
    transport.setWebView(newWebView);
    resultMsg.sendToTarget();
 
    newWebView.setWebViewClient(new WebViewClient(){
 
     @Override
     public boolean shouldOverrideUrlLoading(WebView webView, String url) {
      
      if (url.contains("//www.ofstack.com")){
       toast(" Intercepted " + url);
       Intent intent = new Intent(getActivity(), CommonWebViewActivity.class);
       intent.putExtra("url",url);
       startActivity(intent);
 
      }else {
       webView.loadUrl(url);
      }
      return true;
     }
    });
 
    return true;
   }
  });
 }
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