How to transform xml with xslt and display it in Android webview

Question

I am trying to display the xml data, which was transformed by xsl file, onto the webview in an Android application. However, the data is not displayed as expected.

Answer 1

Its quite tricky, i try to make it easy to understand. Just follow below steps_

1. Build your XSLT file under res/raw,
2. either parse your XML or be ready with your XML(in res/raw)
3. Finally, consume these to display in Android Webview

your cdcatalog_with_xsl.xml & cdcatalog.xsl must be there in res/raw. I have build LoadXSLTinWebview that servers your need_

public class LoadXSLTinWebview extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getWindow().requestFeature(Window.FEATURE_PROGRESS);

    WebView webview = new WebView(this);
    setContentView(webview);

    //Reading XSLT
    String strXSLT = GetStyleSheet(R.raw.cdcatalog);
    //Reading XML
    String strXML = GetStyleSheet(R.raw.cdcatalog_with_xsl);
    /*
     * Loading XSLT...
     */
      //Transform ...
      String html=StaticTransform(strXSLT, strXML);
      //Loading the above transformed CSLT in to Webview...
      webview.loadData(html,"text/html",null);

}

/*
 * Transform XSLT to HTML string
 */
public static String StaticTransform(String strXsl, String strXml) {
    String html = "";

    try {

        InputStream ds = null;
        ds = new ByteArrayInputStream(strXml.getBytes("UTF-8"));

        Source xmlSource = new StreamSource(ds);

        InputStream xs = new ByteArrayInputStream(strXsl.getBytes("UTF-8"));
        Source xsltSource = new StreamSource(xs);

        StringWriter writer = new StringWriter();
        Result result = new StreamResult(writer);
        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer(xsltSource);
        transformer.transform(xmlSource, result);

        html = writer.toString();

        ds.close();
        xs.close();

        xmlSource = null;
        xsltSource = null;

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (TransformerConfigurationException e) {
        e.printStackTrace();
    } catch (TransformerFactoryConfigurationError e) {
        e.printStackTrace();
    } catch (TransformerException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return html;
}

/*
 * Read file from res/raw...
 */
private String GetStyleSheet(int fileId) {
    String strXsl = null;

        InputStream raw = getResources().openRawResource(fileId);
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        int size = 0;
        // Read the entire resource into a local byte buffer.
        byte[] buffer = new byte[1024];
        try {
            while ((size = raw.read(buffer, 0, 1024)) >= 0) {
                outputStream.write(buffer, 0, size);
            }
            raw.close();

            strXsl = outputStream.toString();

            Log.v("Log", "xsl ==> " + strXsl);
        } catch (IOException e) {
            e.printStackTrace();
        }

    return strXsl;

}

}

OutPut:

I hope this will help all!