xml parsing in android example

xml parsing in android example

In your project create a class file and name it as XMLParser.java. The parser class mainly deals the following operations

XMLParser.java

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

public class XMLParser {

 public final static Document XMLfromString(String xml) {

  Document doc = null;

  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  dbf.setNamespaceAware(true);
  try {

   DocumentBuilder db = dbf.newDocumentBuilder();

   InputSource is = new InputSource(new ByteArrayInputStream(
        xml.getBytes("UTF-8")));
   //is.setCharacterStream(new StringReader(xml));
   
   doc = db.parse(is);

  } catch (ParserConfigurationException e) {
   System.out.println("XML parse error: " + e.getMessage());
   return null;
  } catch (SAXException e) {
   System.out.println("Wrong XML file structure: " + e.getMessage());
   return null;
  } catch (IOException e) {
   System.out.println("I/O exeption: " + e.getMessage());
   return null;
  }

  return doc;

 }

 /**
  * Returns element value
  * 
  * @param elem
  *            element (it is XML tag)
  * @return Element value otherwise empty String
  */
 public final static String getElementValue(Node elem) {
  Node kid;
  String str = "";
  if (elem != null) {
   if (elem.hasChildNodes()) {
    for (kid = elem.getFirstChild(); kid != null; kid = kid
      .getNextSibling()) {
     if (kid.getNodeType() == Node.TEXT_NODE) {
      // Log.d("XMLFUNCTIONS", kid.getNodeValue());
      str = str + kid.getNodeValue();
     }
    }
   }
  }
  return str;
 }



 public static int numResults(Document doc) {
  Node results = doc.getDocumentElement();
  int res = -1;

  try {
   res = Integer.valueOf(results.getAttributes().getNamedItem("count")
     .getNodeValue());
  } catch (Exception e) {
   res = -1;
  }

  return res;
 }

 public static String getValue(Element item, String str) {
  NodeList n = item.getElementsByTagName(str);
  return XMLfunctions.getElementValue(n.item(0));
 }

}

User XMPParser.java class

Document doc = XMLfunctions.XMLfromString(result);
// Parent node is USER
NodeList nodes = doc.getElementsByTagName("USER");
// fill in the list items from the XML document
for (int i = 0; i < nodes.getLength(); i++) {
Element e = (Element) nodes.item(i);

mylist.add(XMLfunctions.getValue(e, "fname"));// 
mylist.add(XMLfunctions.getValue(e, "lname"));// 
}

Bishnu