Question

I am trying to parse some data from the following site, to an Android App which I am creating

TFL Tube Data

The data in this feed is constantly updated and can hold anything from nothing to 15/16 items. The basic format of each item is as following:

<ArrayOfLineStatus> - BEGINNING OF XML DOCUMENT    
    <LineStatus ID="10" StatusDetails="No service this weekend due to planned engineering work.">
        <BranchDisruptions/>
        <Line ID="7" Name="Circle"/>
        <Status ID="CS" CssClass="DisruptedService" Description="Planned Closure" IsActive="true">
            <StatusType ID="1" Description="Line"/>
        </Status>
    </LineStatus>
<ArrayOfLineStatus> - END OF XML DOCUMENT

I need to go through the entire and pull the value of the attribute of “Name” in Line and “Description” in “Status”. So in the above I would be pulling “Circle” and “Planned Closure”. The classes I have made so far is as follows:

Main Class

    public class TubeStatusXMLParsing  extends Activity {

        static final String baseURL = "http://cloud.tfl.gov.uk/TrackerNet    
                                          /LineStatus/IncidentsOnly";
       /** Called when the activity is first created. */
       @Override
       public void onCreate(Bundle icicle) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build(); 
            StrictMode.setThreadPolicy(policy);
            super.onCreate(icicle);
            setContentView(R.layout.tube_status);
            getStatus();        
            }

       public void getStatus() {
        // TODO Auto-generated method stub
        try{
            URL website = new URL(baseURL);
            //getting xmlreader to parse data
            SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser sp = spf.newSAXParser();
            XMLReader xr = sp.getXMLReader();
            HandlingXMLStuff doingWork = new HandlingXMLStuff();
            xr.setContentHandler(doingWork);
            xr.parse(new InputSource(website.openStream()));
            String listofStatuses = doingWork.getInformation();
            circleStatus.setText(listofStatuses);
        }catch (Exception e){
            circleStatus.setText("error");
        }
    }
}

Handling XML

import java.util.ArrayList;
import java.util.List;

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

import android.sax.Element;
import android.sax.RootElement;

public class HandlingXMLStuff extends DefaultHandler {

    private ArrayList<String>statuses = null;
    String status;
    String lineName;

    public String getInformation(){
        return statuses.get(0);
    }

    @Override
    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("ArrayOfLineStatus")){
            statuses = new ArrayList<String>();
        }else if(qName.equalsIgnoreCase("Status")){
            status = attributes.getValue("Status");
            statuses.add(status);
            }

        }

Any Help on this would be greatly appreciated

Thanks

Answer 1

It is hard to understand what you need, but you are getting the attributes wrong.
I think it should somehow like this

else if (qName.equalsIgnoreCase("Status")) {
    object = new Status();
    object.id = attributes.getValue("ID");
    object.cssClass = attributes.getValue("CssClass");
    object.isActive = attributes.getValue("IsActive");
    object.description = attributes.getValue("Description");
}
else if (qName.equalsIgnoreCase("StatusType")) {
    object.typeId = attributes.getValue("ID");
    //etc, and maybe the StatusType should be a nested class of Status and stored in array field
}

And in your endElement

if (qName.equalsIgnoreCase("Status")) {
    statuses.add(object);
}

I’m too lazy to write the whole thing, I wrote it just to show how to get attributes.
Also, I prefer using android.sax instead of directly creating the DefaultHandler.