how to parse XML Programmatically in Android

In Android some times we have to parse XML data to use in Application .So here the example for Parsing the XML data .

Step 1:

Create XMLParser.java Class and paste the code like :-

 import android.util.Log;  
 import org.apache.http.HttpEntity;  
 import org.apache.http.HttpResponse;  
 import org.apache.http.client.ClientProtocolException;  
 import org.apache.http.client.methods.HttpPost;  
 import org.apache.http.impl.client.DefaultHttpClient;  
 import org.apache.http.util.EntityUtils;  
 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;  
 import java.io.IOException;  
 import java.io.StringReader;  
 import java.io.UnsupportedEncodingException;  
 import javax.xml.parsers.DocumentBuilder;  
 import javax.xml.parsers.DocumentBuilderFactory;  
 import javax.xml.parsers.ParserConfigurationException;  
 public class XMLParser {  
  // constructor  
  public XMLParser() {  
  }  
  /**  
  * Getting XML from URL making HTTP request  
  * @param url string  
  * */  
  public String getXmlFromUrl(String url) {  
  String xml = null;  
  try {  
   // defaultHttpClient  
   DefaultHttpClient httpClient = new DefaultHttpClient();  
   HttpPost httpPost = new HttpPost(url);  
   HttpResponse httpResponse = httpClient.execute(httpPost);  
   HttpEntity httpEntity = httpResponse.getEntity();  
   xml = EntityUtils.toString(httpEntity);  
  } catch (UnsupportedEncodingException e) {  
   e.printStackTrace();  
  } catch (ClientProtocolException e) {  
   e.printStackTrace();  
  } catch (IOException e) {  
   e.printStackTrace();  
  }  
  // return XML  
  return xml;  
  }  
  /**  
  * Getting XML DOM element  
  * @param XML string  
  * */  
  public Document getDomElement(String xml){  
  Document doc = null;  
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
  try {  
   DocumentBuilder db = dbf.newDocumentBuilder();  
   InputSource is = new InputSource();  
      is.setCharacterStream(new StringReader(xml));  
      doc = db.parse(is);   
   } catch (ParserConfigurationException e) {  
   Log.e("Error: ", e.getMessage());  
   return null;  
   } catch (SAXException e) {  
   Log.e("Error: ", e.getMessage());  
        return null;  
   } catch (IOException e) {  
   Log.e("Error: ", e.getMessage());  
   return null;  
   }  
      return doc;  
  }  
  /** Getting node value  
   * @param elem element  
   */  
  public final String getElementValue( Node elem ) {  
    Node child;  
    if( elem != null){  
      if (elem.hasChildNodes()){  
        for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){  
          if( child.getNodeType() == Node.TEXT_NODE ){  
            return child.getNodeValue();  
          }  
        }  
      }  
    }  
    return "";  
  }  
  /**  
   * Getting node value  
   * @param Element node  
   * @param key string  
   * */  
  public String getValue(Element item, String str) {   
   NodeList n = item.getElementsByTagName(str);   
   return this.getElementValue(n.item(0));  
  }  
 }  

Step 2:

Use this Class Where we need Like this

 static final String KEY_ID = "key_Id_from_xml";     // for example KEY_ID ="param"  
 static final String URL = "Your Url here";  
 ArrayList<String>QId=new ArrayList<>();  
 ArrayList<String>map=new ArrayList<>();  
    XMLParser parser = new XMLParser();  
    String xml = parser.getXmlFromUrl(URL); // getting XML  
    Document doc = parser.getDomElement(xml); // getting DOM element  
    NodeList nl = doc.getElementsByTagName(KEY_ID);  
    for (int i = 0; i < nl.getLength(); i++) {  
    Element e = (Element) nl.item(i);  
    String id = e.getAttribute("get attribute name"); // for example q_id  
    String value = e.getTextContent().toString();  
    map.add(value);  
    QId.add(id);  
     }  

Now the data will stored in map and QId both are Arraylist .Use this per as your requirement in Application.

Thats all !! Happy Coding.