Rendering HTML in a WebView with custom CSS

You could use WebView.loadDataWithBaseURL

htmlData = "<link rel=\"stylesheet\" type=\"text/css\" href=\"style.css\" />" + htmlData;
// lets assume we have /assets/style.css file
webView.loadDataWithBaseURL("file:///android_asset/", htmlData, "text/html", "UTF-8", null);

And only after that WebView will be able to find and use css-files from the assets directory.

ps And, yes, if you load your html-file form the assets folder, you don't need to specify a base url.

here is the solution

Put your html and css in your /assets/ folder, then load the html file like so:

    WebView wv = new WebView(this);

    wv.loadUrl("file:///android_asset/yourHtml.html");

then in your html you can reference your css in the usual way

<link rel="stylesheet" type="text/css" href="main.css" />

I assume that your style-sheet "style.css" is already located in the assets-folder

1. load the web-page with jsoup:

   doc = Jsoup.connect("http://....").get();
   

2. remove links to external style-sheets:

   // remove links to external style-sheets
   doc.head().getElementsByTag("link").remove();
   

3. set link to local style-sheet:

   // set link to local stylesheet
   // <link rel="stylesheet" type="text/css" href="style.css" />
   doc.head().appendElement("link").attr("rel", "stylesheet").attr("type", "text/css").attr("href", "style.css");
   

4. make string from jsoup-doc/web-page:

   String htmldata = doc.outerHtml();
   

5. display web-page in webview:

   WebView webview = new WebView(this);
   setContentView(webview);
   webview.loadDataWithBaseURL("file:///android_asset/.", htmlData, "text/html", "UTF-8", null);