Android xml parsing [closed]

Answer 1

1. Getting XML content by making HTTP Request

   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();
       }
       // return XML
       return xml;
   }
   

2. Parsing XML content and getting DOM element

   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(is);
   
           } 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;
       }
   

3. Get each xml child element value by passing element node name

   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 "";
   }
   

Answer 2

You can check out this post...

They would have nicely discussed all 3 kinds of parsers available in Android along with code samples

http://www.ibm.com/developerworks/opensource/library/x-android/index.html

Answer 3

You parse XML on Android just like you would do it in regular Java. You have both org.w3c.dom and org.xml.sax packages available in Android. Use the one that best fits your needs, there are plenty of tutorials for both of them available on the Internet.