How do I get the web page contents from a WebView

Question

On Android  I have a WebView that is displaying a page   How do I get the page source without requesting the page again   It seems WebView should have some kind of getPageSource   method that returns a string  but alas it does not   If I enable JavaScript  what is the appropriate JavaScript to put in this call to get the contents   webview loadUrl  javascript  function                document getElementsByTagName  body   0  style color    red

User · Answer

Per issue 12987  Blundell s answer crashes  at least on my 2 3 VM   Instead  I intercept a call to console log with a special prefix      intercept calls to console log web setWebChromeClient new WebChromeClient         public boolean onConsoleMessage ConsoleMessage cmsg                   check secret prefix         if  cmsg message   startsWith  MAGIC                          String msg   cmsg message   substring 5      strip off prefix                 process HTML                 return true                     return false                inject the JavaScript on page load web setWebViewClient new WebViewClient         public void onPageFinished WebView view  String address                   have the page spill its guts  with a secret prefix         view loadUrl  javascript console log  MAGIC  document getElementsByTagName  html   0  innerHTML                 web loadUrl  http   www google com

User · Answer

You also need to annotate the method with  JavascriptInterface if your targetSdkVersion is    17 - because there is new security requirements in SDK 17  i e  all javascript methods must be annotated with  JavascriptInterface  Otherwise you will see error like  Uncaught TypeError  Object  object Object  has no method  processHTML  at null 1

User · Answer

I know this is a late answer  but I found this question because I had the same problem  I think I found the answer in this post on lexandera com  The code below is basically a cut-and-paste from the site  It seems to do the trick   final Context myApp   this      An instance of this class will be registered as a JavaScript interface    class MyJavaScriptInterface        JavascriptInterface      SuppressWarnings  unused       public void processHTML String html                   process the html as needed by the app          final WebView browser    WebView findViewById R id browser      JavaScript must be enabled if you want it to work  obviously    browser getSettings   setJavaScriptEnabled true       Register a new JavaScript interface called HTMLOUT    browser addJavascriptInterface new MyJavaScriptInterface     HTMLOUT        WebViewClient must be set BEFORE calling loadUrl     browser setWebViewClient new WebViewClient          Override     public void onPageFinished WebView view  String url                   This call inject JavaScript into the page which just finished loading             browser loadUrl  javascript window HTMLOUT processHTML   lt head gt   document getElementsByTagName  html   0  innerHTML   lt  head gt                      load a web page    browser loadUrl  http   lexandera com files jsexamples gethtml html

User · Answer

If you are working on kitkat and above  you can use the chrome remote debugging tools to find all the requests and responses going in and out of your webview and also the the html source code of the page viewed    https   developer chrome com devtools docs remote-debugging

User · Answer

This is an answer based on jluckyiv s  but I think it is better and simpler to change Javascript as follows   browser loadUrl  javascript HTMLOUT processHTML document documentElement outerHTML

User · Answer

Have you considered fetching the HTML separately  and then loading it into a webview   String fetchContent WebView view  String url  throws IOException       HttpClient httpClient   new DefaultHttpClient        HttpGet get   new HttpGet url       HttpResponse response   httpClient execute get       StatusLine statusLine   response getStatusLine        int statusCode   statusLine getStatusCode        HttpEntity entity   response getEntity        String html   EntityUtils toString entity      assume html for simplicity     view loadDataWithBaseURL url  html   text html    utf-8   url      todo  get mime  charset from entity     if  statusCode    200               handle fail           return html

User · Answer

I managed to get this working using the code from  jluckyiv s answer but I had to add in  JavascriptInterface annotation to the processHTML method in the MyJavaScriptInterface   class MyJavaScriptInterface        SuppressWarnings  unused        JavascriptInterface     public void processHTML String html                   process the html as needed by the app

[android] How do I get the web page contents from a WebView?

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