how to display image in grid view reading imageUrl from xml using sax parser in android

Question

I am new in android. I want to create a application to read the XML file from an URL and show the image in a grid view using ImageUrl of image.

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Thanks for the

Answer 1

• Working with XML on Android
• Grid View example

Answer 2

Check the following URl to kow about XML parsers

http://www.totheriver.com/learn/xml/xmltutorial.html#6.2

First get the data from url. store in in file. use the folowing code to parse the XML using SAXParser

SAX Parser to parse an XML

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

public class SAXParserExample extends DefaultHandler{

    List myEmpls;

    private String tempVal;

    //to maintain context
    private Employee tempEmp;


    public SAXParserExample(){
        myEmpls = new ArrayList();
    }

    public void runExample() {
        parseDocument();
        printData();
    }

    private void parseDocument() {

        //get a factory
        SAXParserFactory spf = SAXParserFactory.newInstance();
        try {

            //get a new instance of parser
            SAXParser sp = spf.newSAXParser();

            //parse the file and also register this class for call backs
            sp.parse("employees.xml", this);

        }catch(SAXException se) {
            se.printStackTrace();
        }catch(ParserConfigurationException pce) {
            pce.printStackTrace();
        }catch (IOException ie) {
            ie.printStackTrace();
        }
    }

    /**
     * Iterate through the list and print
     * the contents
     */
    private void printData(){

        System.out.println("No of Employees '" + myEmpls.size() + "'.");

        Iterator it = myEmpls.iterator();
        while(it.hasNext()) {
            System.out.println(it.next().toString());
        }
    }


    //Event Handlers
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        //reset
        tempVal = "";
        if(qName.equalsIgnoreCase("Employee")) {
            //create a new instance of employee
            tempEmp = new Employee();
            tempEmp.setType(attributes.getValue("type"));
        }
    }


    public void characters(char[] ch, int start, int length) throws SAXException {
        tempVal = new String(ch,start,length);
    }

    public void endElement(String uri, String localName, String qName) throws SAXException {

        if(qName.equalsIgnoreCase("Employee")) {
            //add it to the list
            myEmpls.add(tempEmp);

        }else if (qName.equalsIgnoreCase("Name")) {
            tempEmp.setName(tempVal);
        }else if (qName.equalsIgnoreCase("Id")) {
            tempEmp.setId(Integer.parseInt(tempVal));
        }else if (qName.equalsIgnoreCase("Age")) {
            tempEmp.setAge(Integer.parseInt(tempVal));
        }

    }

    public static void main(String[] args){
        SAXParserExample spe = new SAXParserExample();
        spe.runExample();
    }

}