Read Or Parse XML File From Web Server in Android

To Day I will show you How to read or Parse Xml File Hosted on Web Server or Hosting Server using Android .
In this tutorial we Will Talk about How to Parse Xml file and How to Bind With List View in Android.

In This Tutorials We will be Using .
1) HTTP Request to get XML File from Web Server or Hosting Server.
2) Read Or access XML Data .



3) Bind the XML Data To List View.


So Lets Start With Http Request .

Before This I have already uploaded a detailed Tutorial  On XML to Web server or Hosting Server With the URL
(http://p-xr.com/xml/). It is recommended to understand that tutorial first. How to Upload XML File FREE On Web Server .

My uploaded XML File Contains The Following Data .

  
   1
   Mark
   6958
  
  
   2
   Wesley
   4039
  
  
   3
   Roy
   3809
  
  
   4
   Mike
   1980
  
  
   5
   Tina
   24
  
  
   6
   Ike
   3
  

If The Above Data Looks like Text then go to this link (http://p-xr.com/xml/) and right click to view Source code where you will be able to See Actual XML data.

In the Next step We simply Make a new Method Which takes a String as Aurgument and Returns back a String Value. This method is Actually Downloads or gets the Xml data through
Http Request.Code is given below :-

public static String getXML(String URl){
String line = null;
try {

 DefaultHttpClient httpClient = new DefaultHttpClient();
//WithoutAurgument HttpPost httpPost = new HttpPost("http://p-xr.com/xml");
        HttpPost httpPost = new HttpPost("URl");
 HttpResponse httpResponse = httpClient.execute(httpPost);
 HttpEntity httpEntity = httpResponse.getEntity();
 line = EntityUtils.toString(httpEntity);
 }
catch (UnsupportedEncodingException e)
{
line = "Can't connect to server";
}
catch (MalformedURLException e)
{
line = "Can't connect to server";
}
catch (IOException e) 
{
line = "Can't connect to server";
}
return line;

}

After Getting Xml Data we have to Parse it and Since Data is in XML format we will Have parse it to a Document.
Here We pass String (Argument) having Xml Data and It returns Back a dcoument.

See Code is Below

public Document XMLfromString(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(is); 
}
 catch (ParserConfigurationException e)
 {
System.out.println("XML parse error: " + e.getMessage());
return null;
  
}
 catch (SAXException e) 
{
System.out.println("Wrong XML file structure: " + e.getMessage());
  return null;
}
 catch (IOException e)
 {
System.out.println("I/O exeption: " + e.getMessage());
return null;
}

 return doc;
}

So Till now We Get Data From XML hosted on WebServer and Structured XML file data
into Document File , Now We Bind the Data in List View

For Binding Data In ListView we will have to do the Following
1) Make An Activity Class
2)Extends this Activity Class to a ListActivity
3)A custom ListView with 2 lines in each list item
4)implements a on ItemClick method of ListView

The Full code of Activity Is Following

public class Main extends ListActivity {
  /** Called when the activity is first created. */
    @Override
 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listplaceholder);

//Needed for the listItems
 ArrayList> mylist 
= new ArrayList>();

    //Get the xml string from the server
        String xml = XMLfunctions.getXML();
        Document doc = XMLfunctions.XMLfromString(xml);

        int numResults = XMLfunctions.numResults(doc);

        if((numResults <= 0)){
     Toast.makeText(Main.this, 
"Geen resultaten gevonden", Toast.LENGTH_LONG).show();
        finish();
        }

NodeList nodes = doc.getElementsByTagName("result");

  //fill in the list items from the XML document
for (int i = 0; i < nodes.getLength(); i++) {
HashMap map = new HashMap(); 

      Element e = (Element)nodes.item(i);
      map.put("id", XMLfunctions.getValue(e, "id"));
      map.put("name", "Naam:" + XMLfunctions.getValue(e, "name"));
      map.put("Score", "Score: " + XMLfunctions.getValue(e, "score"));
      mylist.add(map);
  }  

  //Make a new listadapter
 ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main,
                      new String[] { "name", "Score" },
                      new int[] { R.id.item_title, R.id.item_subtitle });

        setListAdapter(adapter);

 //Get the listView ( from: ListActivity )
        final ListView lv = getListView();
        lv.setTextFilterEnabled(true);
        lv.setOnItemClickListener(new OnItemClickListener() {
       public void onItemClick(AdapterView parent, 
View view, int position, long id) {
          @SuppressWarnings("unchecked")
HashMap o = 
(HashMap) lv.getItemAtPosition(position);
        Toast.makeText(Main.this,
 "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); 

 }
});
    }
}

Source 1 for Android 4.0
Download Code From HERE

Source 2For Android 2.2 (Recommended)
Download Code From HERE

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