java - xmlreader do not run the startelement method -

i have problems xmlreader. can run , url correct have not run startelement method. value returned null. want know why happen , soludtion. thank you!

package com.headfirstlabs.nasadailyimage;  import java.io.ioexception; import java.io.inputstream; import java.net.httpurlconnection; import java.net.url; import java.net.unknownhostexception; import java.util.jar.attributes;  import javax.xml.parsers.saxparser; import javax.xml.parsers.saxparserfactory;  import org.xml.sax.inputsource; import org.xml.sax.saxexception; import org.xml.sax.xmlreader; import org.xml.sax.helpers.defaulthandler;  import android.graphics.bitmap; import android.graphics.bitmapfactory; import android.os.strictmode;  public class iotdhandler 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 title = null;     private stringbuffer description = new stringbuffer();     private string date = null;      public void processfeed() {     try {         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);     inputstream inputstream = new url(url).openstream();     reader.parse(new inputsource(inputstream));     }     catch(unknownhostexception e)     {         title="unknownhostexception";     }     catch(ioexception e)     {         title="ioexception";     }     catch(saxexception e)     {         title="saxexception";     }     catch (exception e) {          title="exception";         system.out.println(e);     }     }      private bitmap getbitmap(string url) {         try {         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) { return null; }     }      public void startelement(string uri, string localname, string qname,     attributes attributes) throws saxexception {         if (localname.equals("url")) { 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) {     string chars = new string(ch).substring(start, start + length);     if (inurl && url == null) { image = getbitmap(chars); }     if (intitle && title == null) { 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; } } 

the problem line:

import java.util.jar.attributes; 

it should

import org.xml.sax.attributes; 

because you've got wrong type fourth parameter of startelement, method doesn't override startelement in defaulthandler, , default implementation of startelement in defaulthandler being called instead of method.

you can use @override annotation indicate method should override method in superclass. if method @override annotation not override superclass method, compiler error. in fact, such error if put annotation on startelement method.