Using XML Parser : Xml « Development « Android

1. Android
2. Development
3. Xml

Using XML Parser

     
package app.test;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class Test extends Activity {
  XMLUser aUser;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    String xml = "<?xml version=\"1.0\"?>\n" + "<user>\n"
        + "<user-id>1</user-id>\n" + "<username>a</username>\n"
        + "<firstname>B</firstname>\n"
        + "<lastname>C</lastname>\n" + "</user>\n";
    SAXParserFactory aSAXParserFactory = SAXParserFactory.newInstance();
    try {
      SAXParser aSAXParser = aSAXParserFactory.newSAXParser();
      XMLReader anXMLReader = aSAXParser.getXMLReader();
      UserXMLHandler aUserXMLHandler = new UserXMLHandler();
      anXMLReader.setContentHandler(aUserXMLHandler);
      anXMLReader.parse(new InputSource(new ByteArrayInputStream(xml.getBytes())));
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  class UserXMLHandler extends DefaultHandler {

    static final int NONE = 0;
    static final int ID = 1;
    static final int FIRSTNAME = 2;
    static final int LASTNAME = 3;

    int state = NONE;

    static final String ID_ELEMENT = "user-id";
    static final String FIRSTNAME_ELEMENT = "firstname";
    static final String LASTNAME_ELEMENT = "lsatname";

    @Override
    public void startDocument() throws SAXException {
      Log.v("SimpleXMLParser", "startDocument");
      aUser = new XMLUser();
    }

    @Override
    public void endDocument() throws SAXException {
      Log.v("SimpleXMLParser", "endDocument");
      Log.v("SimpleXMLParser", "User Info: " + aUser.user_id + " "
          + aUser.firstname + " " + aUser.lastname);
    }

    @Override
    public void startElement(String uri, String localName, String qName,
        Attributes attributes) throws SAXException {
      Log.v("SimpleXMLParser", "startElement");
      if (localName.equalsIgnoreCase(ID_ELEMENT)) {
        state = ID;
      } else if (localName.equalsIgnoreCase(FIRSTNAME_ELEMENT)) {
        state = FIRSTNAME;
      } else if (localName.equalsIgnoreCase(LASTNAME_ELEMENT)) {
        state = LASTNAME;
      } else {
        state = NONE;
      }
    }

    @Override
    public void endElement(String uri, String localName, String qName)
        throws SAXException {
      Log.v("SimpleXMLParser", "endElement");

    }

    @Override
    public void characters(char[] ch, int start, int length)
        throws SAXException {
      String stringChars = new String(ch, start, length);
      if (state == ID) {
        aUser.user_id += stringChars.trim();
        Log.v("SimpleXMLParser", "user_id:" + aUser.user_id);
      } else if (state == FIRSTNAME) {
        aUser.firstname += stringChars.trim();
        Log.v("SimpleXMLParser", "firstname:" + aUser.firstname);
      } else if (state == LASTNAME) {
        aUser.lastname += stringChars.trim();
        Log.v("SimpleXMLParser", "lastname:" + aUser.lastname);
      }
    }
  }
}

class XMLUser {
  String user_id;
  String firstname;
  String lastname;

  public XMLUser() {
    user_id = "";
    firstname = "";
    lastname = "";
  }
}

   
    
    
    
    
  

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