SpacePicHandler.java

package com.example.spacepics;// Replace with your package name

import org.xml.sax.helpers.DefaultHandler;
import android.annotation.SuppressLint;
import android.graphics.*;
import android.os.StrictMode;

import javax.xml.parsers.*;
import org.xml.sax.*;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.HttpURLConnection;
import java.io.IOException;

@SuppressLint("NewApi")
public class SpacePicHandler extends DefaultHandler {
    private String url = "http://www.nasa.gov/rss/image_of_the_day.rss";
    private boolean inUrl = false;
    private boolean inTitle = false;
    private boolean inDescription = false;
    private boolean inItem = false;
    private boolean inDate = false;
    private Bitmap image = null;
    private String imageUrl=null;
    private String title = null;
    private StringBuffer description = new StringBuffer();
    private String date = null;
    
    public void processFeed() {
    try {
    //This part is added to allow the network connection on a main GUI thread...    
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy); 
        SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser parser = factory.newSAXParser();
        XMLReader reader = parser.getXMLReader();
        reader.setContentHandler(this);
        URL urlObj = new URL(url);
        InputStream inputStream = urlObj.openConnection().getInputStream();
        reader.parse(new InputSource(inputStream));
    } 
    catch (Exception e) 
    {
        e.printStackTrace();
        System.out.println(new String("Got Exception General"));
    }
    }
    
    private Bitmap getBitmap(String url) {
    try {
        System.out.println(url);
    HttpURLConnection connection =
    (HttpURLConnection)new URL(url).openConnection();
    connection.setDoInput(true);
    connection.connect();
    InputStream input = connection.getInputStream();
    Bitmap bitmap = BitmapFactory.decodeStream(input);
    input.close();
    return bitmap;
    } 
    catch (IOException ioe) 
    {
        System.out.println(new String("IOException in reading Image"));
        return null;
    }
    catch (Exception ioe) 
    {
        System.out.println(new String("IOException GENERAL"));
        return null;
    }
    }
    
    public void startElement(String uri, String localName, String qName,
    Attributes attributes) throws SAXException 
    {
    
    if (localName.equals("enclosure"))
    {
        System.out.println(new String("characters Image"));
        imageUrl = attributes.getValue("","url");
        System.out.println(imageUrl);
        inUrl = true; 
    }
    else { inUrl = false; }
    if (localName.startsWith("item")) { inItem = true; }
    else if (inItem) {
    if (localName.equals("title")) { inTitle = true; }
    else { inTitle = false; }
    if (localName.equals("description")) { inDescription = true; }
    else { inDescription = false; }
    if (localName.equals("pubDate")) { inDate = true; }
    else { inDate = false; }
    }
    }
    
    public void characters(char ch[], int start, int length) {
        System.out.println(new String("characters"));
    String chars = new String(ch).substring(start, start + length);
    System.out.println(chars);
    if (inUrl && image == null) 
    {
        System.out.println(new String("IMAGE"));
        System.out.println(imageUrl);
        image = getBitmap(imageUrl);
    }
    if (inTitle && title == null) {
        System.out.println(new String("TITLE"));
        title = chars; }
    if (inDescription) { description.append(chars); }
    if (inDate && date == null) { date = chars; }
    }
    
    public Bitmap getImage() { return image; }
    public String getTitle() { return title; }
    public StringBuffer getDescription() { return description; }
    public String getDate() { return date; }

}