Volley adapter for making XML Requests. It uses Simple-XML for serializing XML to Objects (http://simple.sourceforge.net/). Code is based of GsonRequest. Hope someone finds it useful.

SimpleXmlRequest.java

import java.io.UnsupportedEncodingException;
import java.util.Map;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.HttpHeaderParser;


/**
 * Simple Volley Class for doing XML HTTP Requests which are parsed 
 * into Java objects by Simple @see {{@link http://simple.sourceforge.net/}
 */
public class SimpleXmlRequest<T> extends Request<T> {
    
    private static final Serializer serializer = new Persister();
    private final Class<T> clazz;
    private final Map<String, String> headers;
    private final Listener<T> listener;
 
    
    /**
     * Make HTTP request and return a parsed object from Response
     * Invokes the other constructor. 
     * 
     * @see SimpleXmlRequest#SimpleXmlRequest(int, String, Class, Map, Listener, ErrorListener)
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz, 
    		Listener<T> listener, ErrorListener errorListener) {
        this(method, url, clazz, null, listener, errorListener);
    }
    
    
    /**
     * Make HTTP request and return a parsed object from XML Response
     *
     * @param url URL of the request to make
     * @param clazz Relevant class object
     * @param headers Map of request headers
     * @param listener
     * @param errorListener
     * 
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
            Listener<T> listener, ErrorListener errorListener) {    	
        super(method, url, errorListener);        
        this.clazz = clazz;
        this.headers = headers;
        this.listener = listener;
    }    

    
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        return headers != null ? headers : super.getHeaders();
    }
 
    
    @Override
    protected void deliverResponse(T response) {
        listener.onResponse(response);
    }
 
    
    @Override
    protected Response<T> parseNetworkResponse(NetworkResponse response) 
    {
        try {
            
       	    String data = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            return Response.success(serializer.read(clazz, data), 
            			    HttpHeaderParser.parseCacheHeaders(response));
        } 
        catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } 
        catch (Exception e) {
			return Response.error(new VolleyError(e.getMessage()));
		} 
    }
}

I'll take a look, thank you!

I'm trying to create a POJO for this XML - http://www1.billboard.com/rss/charts/hot-100

The only data I want is <title>, <link>, <description> - inside each item

The file looks like this now and obviously doesn't work yet, can you guide me a bit please?

@Root(name="rss") //root of the xml file
public class Note {
    @ElementList(name="channel")
    private List channel;

    @Root(name="item")
    public class item{
        @ElementUnion({
                @Element(name = "title", type = String.class),
                @Element(name = "link", type = String.class),
                @Element(name = "description", type = String.class)
        })
        private Object value;
    }
}

thats awesome..

Hi,

thank you for share with us your code.
I have some problems to build my POJO class. Can you share your own?

Thank you.
Mattia

Hi!!

This is a very nice piece of code, it works perfect!!. I just added a simple modification to support allow to add parameters to the request:

public class SimpleXmlRequest extends Request {

private static final Serializer serializer = new Persister();
private final Class<T> clazz;
private final Map<String, String> headers;
private final Listener<T> listener;
private final Map<String, String> parameters;


/**
 * Make HTTP request and return a parsed object from Response
 * Invokes the other constructor.
 *
 * @see SimpleXmlRequest#SimpleXmlRequest(int, String, Class, Map, Listener, ErrorListener)
 */
public SimpleXmlRequest(int method, String url, Class<T> clazz,Map<String, String> parameters,
                        Listener<T> listener,ErrorListener errorListener) {
    this(method, url, clazz, null, parameters, listener, errorListener);
}


/**
 * Make HTTP request and return a parsed object from XML Response
 *
 * @param url           URL of the request to make
 * @param clazz         Relevant class object
 * @param headers       Map of request headers
 * @param listener
 * @param errorListener
 */
public SimpleXmlRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
                        Map<String, String> parameters,Listener<T> listener, ErrorListener errorListener) {
    super(method, url, errorListener);
    this.clazz = clazz;
    this.headers = headers;
    this.listener = listener;
    this.parameters = parameters;

}


@Override
public Map<String, String> getHeaders() throws AuthFailureError {
    return headers != null ? headers : super.getHeaders();
}

@Override
protected Map<String, String> getParams() throws AuthFailureError {
    return this.parameters != null ? parameters : super.getParams();
}

@Override
protected void deliverResponse(T response) {
    listener.onResponse(response);
}


@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
    try {

        String data = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
        Utils.log(data);
        return Response.success(serializer.read(clazz, data),
                HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    } catch (Exception e) {
        return Response.error(new VolleyError(e.getMessage()));
    }
}

}

Thank you for wonderful class! I'm trying to use this actually. Could you please clarify one thing? What the Response exactly is? How does it look like? The thing is, when I used SAX parser I was able to get a list of (as it is for your example) Note objects, so I could use a loop to get items from it. But now I have only that request, and Im not able to get anything from it cause I don't exactly know what does it look like, so could you please help me?

Could you please share Note.java? I am having hard time to create needed Note.java file.

I made simple with getter and setter, but still it don't works

For link http://api.androidhive.info/music/music.xml, I have my java file as below.

@Root(name = "music")
public class XMLMovie {

@ElementList(inline = true, data = false, empty = true, entry = "", name = "", required = false, type = void.class)
ArrayList<song> mSong;

public ArrayList<song> getmSong() {
    return mSong;
}

public void setmSong(ArrayList<song> mSong) {
    this.mSong = mSong;
}

@Root(name = "song")
public static class song {
    @Element(data = false, name = "", required = false, type = String.class)
    String title;
    @Element(data = false, name = "", required = false, type = String.class)
    String artist;
    @Element(data = false, name = "", required = false, type = String.class)
    String duration;
    @Element(data = false, name = "", required = false, type = String.class)
    String thumb_url;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getArtist() {
        return artist;
    }

    public void setArtist(String artist) {
        this.artist = artist;
    }

    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    public String getThumb_url() {
        return thumb_url;
    }

    public void setThumb_url(String thumb_url) {
        this.thumb_url = thumb_url;
    }
}
}

A POJO class who works with this XML:
http://www.w3schools.com/xml/note.xml

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
@root(name="note",strict = false)
public class Usuario {

@Element(name = "to", required = false)
private String to;
@Element(name = "from", required = false)
private String from;
@Element(name = "heading", required = false)
private String heading;
@Element(name = "body", required = false)
private String body;

public String getTo(){
    return to;
}

public String getFrom() {
    return from;
}

public String getHeading() {
    return heading;
}

public String getBody() {
    return body;
}

}

If you need to work with a list, then read this:
http://stackoverflow.com/questions/18317273/deserializing-with-simplexml

Hello guys, I want to handle this xml file

<rss xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" version="2.0"> 

    <channel>
        <title>...</title>
        <atom:link href="..." rel="self" type="application/rss+xml"/>
        <link>...</link>
        <description>...</description>
        <lastBuildDate>Mon, 23 Mar 2015 14:17:24 +0000</lastBuildDate>
        <language>en-US</language>
        <sy:updatePeriod>hourly</sy:updatePeriod>
        <sy:updateFrequency>1</sy:updateFrequency>
        <generator>...</generator>
            <item>
                <title>...</title>
                <link>...</link>
                <comments>...</comments>
                <pubDate>...</pubDate>
                <dc:creator><![CDATA[ ... ]]></dc:creator>
                <category><![CDATA[ ... ]]></category>
                <category><![CDATA[ ... ]]></category>
                <category><![CDATA[ ... ]]></category>
                <category><![CDATA[ ... ]]></category>
                <category><![CDATA[ ... ]]></category>
                <guid isPermaLink="false">...</guid>
                <description><![CDATA[<img width="740" height="493" src="HTTP://...jpg"             class="attachment- wp-post-image" alt="DSC" style="float:left; margin:0 15px 15px 0;" /> ... ]]>
                </description>
                <content:encoded>
                <![CDATA[<img width="740" height="493" src="http://...jpg" class="attachment- wp-post-image" alt="DSC" style="float:left; margin:0 15px 15px 0;" /> bla bla...
]]>
                </content:encoded>
                <wfw:commentRss>...</wfw:commentRss>
                <slash:comments>0</slash:comments>
            </item>
            <item>
            ....
            </item>
</rss>

I want to get the<title> from the <item>and the src="..." from the <description> please tell me how to do that with your class. And how it has to be the POJO class?
I tried what allanfallas said but no success.
Can someone help me?

Hi,
I when I am running my app I am getting this

I/dalvikvm﹕ Could not find method javax.xml.stream.XMLInputFactory.newInstance, referenced from method org.simpleframework.xml.stream.StreamProvider.<init>
W/dalvikvm﹕ VFY: unable to resolve static method 14456: Ljavax/xml/stream/XMLInputFactory;.newInstance ()Ljavax/xml/stream/XMLInputFactory; 
W/dalvikvm﹕ VFY: unable to find class referenced in signature (Ljavax/xml/stream/XMLEventReader;)
W/dalvikvm﹕ VFY: unable to find class referenced in signature (Ljavax/xml/stream/XMLEventReader;)
I/dalvikvm﹕ Could not find method javax.xml.stream.XMLInputFactory.createXMLEventReader, referenced from method org.simpleframework.xml.stream.StreamProvider.provide
VFY: unable to resolve virtual method 14453: Ljavax/xml/stream/XMLInputFactory;.createXMLEventReader (Ljava/io/InputStream;)Ljavax/xml/stream/XMLEventReader;
Could not find method javax.xml.stream.XMLInputFactory.createXMLEventReader, referenced from method org.simpleframework.xml.stream.StreamProvider.provide
VFY: unable to resolve virtual method 14454: Ljavax/xml/stream/XMLInputFactory;.createXMLEventReader (Ljava/io/Reader;)Ljavax/xml/stream/XMLEventReader;

Is this because I don't use stax-1.2.0.jar , stax-api-1.0.1.jar , xpp3-1.1.3_8.jar ?

For the ones having the same problem as @ArcturusArc (just above me), you don't really need to worry about those messages.. if you want to know why, here you have a good reading https://robertmassaioli.wordpress.com/2011/04/21/simple-xml-in-android-1-5-and-up/ .

The first time I used this SimpleXMLRequest class I was getting those messages too, and I though that they were the reason why I wasn't getting the serialized object I wanted from the request. Anyway, I was wrong, I just forgot to define some attributes in my POJO's, so please make sure your POJO's are well defined too.

A quick note to itsalif.. This class works very well, thanks for sharing!

Hi,
how can I send xml data using volley?

How to send xml request in volley as mentioned in above picture ?

Hello ,
I have following response

<APIGetCitiesResponse xmlns="http://tempuri.org/">
    <APIGetCitiesResult xmlns:a="http://schemas.datacontract.org/2004/07/CRS2011AgentApi" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
        <a:CityPair>
            <a:FromCityID>1</a:FromCityID>
            <a:FromCityName>Ahmedabad</a:FromCityName>
            <a:ToCityID>10</a:ToCityID>
            <a:ToCityName>Amreli</a:ToCityName>
        </a:CityPair>
        <a:CityPair>
            <a:FromCityID>1</a:FromCityID>
            <a:FromCityName>Ahmedabad</a:FromCityName>
            <a:ToCityID>57</a:ToCityID>
            <a:ToCityName>Ankleshwar</a:ToCityName>
        </a:CityPair>
</APIGetCitiesResult>
</APIGetCitiesResponse>

How to handle it ??

Can anybody help me out??.. its urgent : (

how to send POST request with XML parameter? TIA