Parsing XML from the Net - Using the SAXParser

Rohini · by **Rohini** » Wed Feb 24, 2010 10:23 am

hi i didnt get the extracted string in my output.. may i know why?

my7h1c · by **my7h1c** » Wed Feb 24, 2010 5:24 pm

pradeep_android wrote:i tried ur first xml parsing.
it returned this error

"permission denied(may be missing Internet Persmission)

i tried this saving xml in local host still got the same error. How to resolve it?
kindly help with this plz

urgent

-thanks in advance

you need to add <uses-permission android:name="android.permission.INTERNET" /> to the android manifest

my7h1c · by **my7h1c** » Wed Feb 24, 2010 7:54 pm

can some please help with my question I want to be able to put the text we got from the xml into an xml layout that I can use in a variety of activity's.

freaky_flash · by **freaky_flash** » Fri Mar 05, 2010 7:29 am

hey plusminus,
can you help me in parsing image tags in XHTML and displaying those images in Android emulator? Plz. reply asap....

epicFail · by **epicFail** » Fri Mar 12, 2010 2:17 am

Excellent tutorial!

I am alittle stuck... I need to parse an xml which contains:
<article xml:id="0">

Any idea on how to do this? I can't seem to get it to work.

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                 if(this.in_article)
 
                        myParsedExampleDataSet.setId(atts.getValue("xml:", "id"));
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

Jonasm · by **Jonasm** » Mon Mar 29, 2010 4:32 pm

Tutorial is great and everything seems to be working perfectly, but i have one problem... in handler file when i write @Override near the public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException{} i get an error: public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException. And the only solution which eclipse suggest is to remove @Override, but then this method doesn't work. here is my code:

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    /** Gets be called on opening tags like:
 
     * <tag>
 
     * Can provide attribute(s), when xml was like:
 
     * <tag attribute="attributeValue">*/
 
    @Override
 
    public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
 
        if(localName.equals("cases")){
 
                this.in_cases = true;
 
        }else if(localName.equals("case")){
 
                this.in_case = true;
 
        }else if(localName.equals("files")){
 
                this.in_files = true;
 
        }else if(localName.equals("file")){
 
                this.in_file = true;
 
        }else if(localName.equals("name")){
 
                this.in_name = true;
 
        }else if(localName.equals("title")){
 
                this.in_title = true;
 
        }else if(localName.equals("id")){
 
                this.in_id = true;
 
        }
 
    }
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

Maybe somedy has any idea where the problem is? everything is ok with other functions.

[hr]

Edit: I found my mistake. It was wrong Attributes import. I had to import org.xml.sax.Attributes

mmgill · by **mmgill** » Mon Mar 29, 2010 9:51 pm

Hi,
Iv been having some trouble trying to parse an XML file that looks like this:

http://local.yahooapis.com/LocalSearchS ... &results=3

All that i want to get is the name of the banks within the <Title> tags and add them to a ListView. I have been looking around trying to find a solution but am about to go nuts. Could someone please give me example code that would add the titles to a ListView so i can grasp the concept of parsing XML. Thanks for all the help and preventing me from going insane.

Mg

Jonasm · by **Jonasm** » Tue Mar 30, 2010 7:58 am

All you have to do, is something like this:

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@Override
 
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
 
     if(localName.equals("Title")){
 
          this.in_title = true;
 
     }
 
}
 
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
 
        if(localName.equals("Title")){
 
                this.in_title = false;
 
        }
 
}
 
Parsed in 0.036 seconds,  using GeSHi 1.0.8.4

and

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public void characters(char ch[], int start, int length) {
 
        if(this.in_title){
 
                String title = new String(ch, start, length));
 
                //add string title to your list
 
        }
 
}
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

I hope this helps.

mmgill · by **mmgill** » Tue Mar 30, 2010 7:27 pm

hi,

thanks for getting back to me so soon. I added these snippets into my code but am still not getting the results i need. I dont want the titles to be added to the a string of items but to a scrollable listview. I have been trying to do it may different ways but think that there might be a problem with how the xml is formed. can someone take a look at it and see if it would even work if i wanted to add it to a list view by <title>?

http://local.yahooapis.com/LocalSearchS ... &results=4

Also, is there anywhere that has a good example of how to get info, like the title, out and added to a listview?
!
Thanks for the help guys!]

Mg

Jonasm · by **Jonasm** » Tue Mar 30, 2010 7:37 pm

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String title = new String(ch, start, length)); 
 
Parsed in 0.037 seconds,  using GeSHi 1.0.8.4

This line is only for getting title, i mean it forms string. Later you can add that string to let's say ArrayList and then to your ListView from ArrayList.

mmgill · by **mmgill** » Tue Mar 30, 2010 7:38 pm

hi,

Im sorry this is where im getting lost. I am not sure how to go about adding it to an array then to listview

thanks

mmgill · by **mmgill** » Tue Mar 30, 2010 8:52 pm

So this is what i have so far

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package com.google.it;
 
import java.util.jar.Attributes;
 
import org.xml.sax.SAXException;
 
import org.xml.sax.helpers.DefaultHandler;
 
public class SAXparserHandler extends DefaultHandler{
 
    private boolean in_title = false;
 
    private ParsedDataSet myParsedDataSet = new ParsedDataSet();
 
    public ParsedDataSet getParsedData() {
 
         return this.myParsedDataSet;
 
    }
 
    @Override
 
    public void startDocument() throws SAXException {
 
         this.myParsedDataSet = new ParsedDataSet();
 
    }
 
    @Override
 
    public void endDocument() throws SAXException {
 
         // Nothing to do
 
    }
 
    public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
 
     if(localName.equals("Title")){
 
          this.in_title = true;
 
     }    
 
    }
 
    @Override
 
    public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
 
     if(localName.equals("Title")){
 
          this.in_title = false;
 
          }
 
    }
 
    @Override
 
    public void characters(char ch[], int start, int length) {
 
     if(this.in_title){
 
          myParsedDataSet.addTitle(new String(ch, start, length));
 
     }
 
    }
 
} 
 
Parsed in 0.043 seconds,  using GeSHi 1.0.8.4

and

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package com.google.it;
 
import java.util.ArrayList;
 
public class ParsedDataSet {
 
    ArrayList<String> titles = new ArrayList<String>();
 
    public void addTitle(String tit){
 
         titles.add(tit);
 
    }
 
    public ArrayList<String> getTitles(){
 
         return titles;
 
    }
 
} 
 
Parsed in 0.037 seconds,  using GeSHi 1.0.8.4

and..

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package com.google.it;
 
import java.net.URL;
 
import java.util.ArrayList;
 
import javax.xml.parsers.SAXParserFactory;
 
import org.xml.sax.InputSource;
 
import org.xml.sax.XMLReader;
 
public class SAXParser {
 
    ParsedDataSet parsedDataSet;
 
    URL url;
 
    public SAXParser(URL u){
 
         url = u;
 
         parse();
 
    }
 
    public void parse(){
 
         try {
 
           SAXParserFactory spf = SAXParserFactory.newInstance();
 
           javax.xml.parsers.SAXParser sp = spf.newSAXParser();
 
           XMLReader xr = sp.getXMLReader();
 
           SAXparserHandler myHandler = new SAXparserHandler();
 
           xr.setContentHandler(myHandler);
 
           xr.parse(new InputSource(url.openStream()));
 
           parsedDataSet = myHandler.getParsedData();
 
      } catch (Exception e) {
 
       //do what you want
 
      }
 
    }
 
    //get parsed data
 
    public ArrayList<String> getParsedTitles(){
 
         return parsedDataSet.getTitles();
 
    }
 
} 
 
Parsed in 0.041 seconds,  using GeSHi 1.0.8.4

and mainactivity

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package com.google.it;
 
import java.net.MalformedURLException;
 
import java.net.URL;
 
import android.app.Activity;
 
import android.os.Bundle;
 
public class TheMain extends Activity{
 
    /** Called when the activity is first created. */
 
        static String feedUrlString = "http://local.yahooapis.com/LocalSearchService/V3/localSearch?appid=YahooDemo&query=bank&latitude=40.5141667&longitude=-88.9905556&radius=2&results=2";
 
        private URL feedUrl;
 
    @Override
 
    public void onCreate(Bundle savedInstanceState) {
 
        super.onCreate(savedInstanceState);
 
        setContentView(R.layout.main);
 
        try {
 
                        this.feedUrl = new URL(feedUrlString);
 
                } catch (MalformedURLException e) {
 
                        // TODO Auto-generated catch block
 
                        e.printStackTrace();
 
                }
 
        SAXParser parser = new SAXParser(feedUrl);
 
        ArrayList<String> titlesList = parser.getParsedTitles(); 
 
    }
 
}
 
Parsed in 0.039 seconds,  using GeSHi 1.0.8.4

With some help i think that this should allow me to add the arraylist in to a listview. Does this sound/look correct? Thanks for the help everyone. Really helps me understand the material.

Mg

Johan Degraeve · by **Johan Degraeve** » Tue Mar 30, 2010 10:09 pm

Using a small open source package :

http://code.google.com/p/easyxmldata/

This is still under construction, needs a bit more documentation and will sure be updated in the future.

Using this package and following code, I find four banks :

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package examplepackagename;
 
import java.util.ArrayList;
 
import net.johandegraeve.easyxmldata.XMLElement;
 
import net.johandegraeve.easyxmldata.EasyXMLDataParser;
 
import org.xml.sax.SAXParseException;
 
public class main {
 
        public static void main (String[] args)   {
 
            XMLElement result = null;
 
            String exceptionresult;
 
            ArrayList<String> resultStrings = new ArrayList<String>();
 
            EasyXMLDataParser myParser = new EasyXMLDataParser(
 
                    null,null);
 
            try {
 
                    result = myParser.parse("http://local.yahooapis.com/LocalSearchService/V3/localSearch?appid=YahooDemo&query=bank&latitude=40.5141667&longitude=-88.9905556&radius=2&results=4");
 
            } catch (SAXParseException e) {
 
                        exceptionresult = e.toString() +
 
                    "\n" +
 
                    "LineNumber = " +   e.getLineNumber() + "\n" +
 
                    "ColumnNumber = " +   e.getColumnNumber() + "\n" +
 
                    "PublicId = " +   e.getPublicId() + "\n" +
 
                    "SystemId = " +   e.getSystemId() + "\n";
 
                System.out.printf(exceptionresult);
 
            }
 
            getText(resultStrings, result);
 
            for (int i = 0;i < resultStrings.size();i++)
 
                System.out.println(resultStrings.get(i));
 
        }
 
        static private void getText(ArrayList<String> list, XMLElement result) {
 
            String text;
 
            if (result.getTagName() != null)
 
                if (result.getTagName().equals("Title")) {
 
                text = result.getText();
 
                if (text != null)
 
                    if (text != "")
 
                        list.add(text);
 
                }
 
            ArrayList<XMLElement> children = result.getChildren();
 
            if (children != null)
 
                for (int i = 0;i < children.size();i++)
 
                    getText(list, children.get(i));
 
        }
 
}
 
Parsed in 0.045 seconds,  using GeSHi 1.0.8.4

the result is :
US Bank
Commerce Bank ATM
Commerce Bank
US Bank

mmgill · by **mmgill** » Tue Mar 30, 2010 11:29 pm

hi,

Iv gotten a little bit farther (have the code to add the array to a listview) but have a problem somewhere.. Can someone please take a look and maybe see something that i dont. THANKS!! big help

Regards,

MG

trickinsk8er · by **trickinsk8er** » Tue Mar 30, 2010 11:51 pm

I needed some help on parsing some xml from a yahoo web service. I need to to run through the XML and find certain tags such as title, address, phone, etc. Right now I just want it to find the titles. It seems like I need an array to put the tags in but I am having trouble. In the end it needs to be displayed in a listview so it can be clicked on and looked at. I need some help on how to do this exactly. Here is my code below: Please let me know what I need to add take out or any changes I need, thanks.

Parsing XML from the Net - Using the SAXParser

Re: Parsing XML from the Net - Using the SAXParser

Re: Parsing XML from the Net - Using the SAXParser

Help Me Please

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