Here is an example for parsing channels from a web service into a listview using xml parser.
json.java
package com.example.json;
import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import android.os.Bundle;
import android.app.ListActivity;
import android.util.Log;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;
public class Json extends ListActivity
{
private static String url = "http://www.yupptv.com/mobile/androidxml.aspx";
String[] names;
// JSON Node names
private static final String CHANNEL = "channel";
private static final String NAME = "name";
private static final String ID = "id";
private static final String TYPE = "type";
private static final String LANGUAGE = "language";
private static final String IMAGE = "image";
private static final String LINK = "link";
private static final String BANDWIDTH = "bandwidth";
private static final String CELLNAPID= "cellnapid";
private static final String TAG = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_json);
// Hashmap for ListView
ArrayList<HashMap<String, String>> channelist = new ArrayList<HashMap<String, String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(url);// getting XML
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(CHANNEL);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++)
{
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => valuez
map.put(NAME, parser.getValue(e,NAME ));
Log.i("name"+ NAME, "created");
map.put(ID, parser.getValue(e,ID));
map.put(TYPE,parser.getValue(e,TYPE ));
map.put(LANGUAGE,parser.getValue(e,LANGUAGE ));
map.put(IMAGE,parser.getValue(e,IMAGE));
map.put(LINK,parser.getValue(e,LINK ));
map.put(BANDWIDTH,parser.getValue(e,BANDWIDTH));
map.put(CELLNAPID, parser.getValue(e,CELLNAPID ));
channelist.add(map);
}
ListAdapter adapter = new SimpleAdapter(this, channelist,
R.layout.list_item,
new String[] { NAME, ID,TYPE,LANGUAGE,IMAGE,LINK,BANDWIDTH,CELLNAPID}, new int[] {
R.id.name, R.id.id,R.id.type,R.id.language,R.id.image,R.id.link,R.id.bandwidth,R.id.cellnapid });
setListAdapter(adapter);
}
}
xmlparser.java
package com.example.json;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import android.util.Log;
public class XMLParser {
public String getXmlFromUrl(String url) {
String xml =null ;
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
xml = EntityUtils.toString(httpEntity);
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
catch (ClientProtocolException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
// e.printStackTrace(err);
}
// return XML
return xml;
}
public Document getDomElement(String xml){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
// InputSource is = new InputSource();
// is.setCharacterStream(new StringReader(xml));
doc = db.parse("http://www.yupptv.com/mobile/androidxml.aspx");
} catch (ParserConfigurationException e) {
Log.e("Error: ", e.getMessage());
return null;
}
catch (SAXException e) {
Log.e("Error: ", e.getMessage());
return null;
} catch (IOException e) {
Log.e("Error: ", e.getMessage());
return null;
}
// return DOM
return doc;
}
public String getValue(Element item, String str)
{
NodeList n = item.getElementsByTagName(str);
return this.getElementValue(n.item(0));
}
public final String getElementValue( Node elem ) {
Node child;
if( elem != null){
if (elem.hasChildNodes()){
for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){
if( child.getNodeType() == Node.TEXT_NODE ){
return child.getNodeValue();
}
}
}
}
return "";
}
}
json.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</RelativeLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
/>
<TextView
android:id="@+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/language"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/bandwidth "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/cellnapid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
give permission in manifest.xml
<uses-permission android:name="android.permission.INTERNET"/>
Screen shot
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