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POAndroid DOM parser, get first item in list
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  1. POAndroid DOM parser, get first item in list
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    copied!<p>I am simply trying to get only the first <code>&lt;song&gt;</code> in my list; the code I am using works fine, but only gets the LAST entry of similar tags (<code>&lt;song&gt;</code>) in my list. Here's my XML:</p> <pre><code> &lt;songs id="stationid"&gt; &lt;song&gt; &lt;title&gt; &lt;![CDATA[ Last Breath ]]&gt; &lt;/title&gt; &lt;artist&gt; &lt;![CDATA[ Xela ]]&gt; &lt;/artist&gt; &lt;album&gt; &lt;![CDATA[ For Frosty Mornings And Summer Nights ]]&gt; &lt;/album&gt; &lt;albumart&gt; &lt;![CDATA[ ]]&gt; &lt;/albumart&gt; &lt;date&gt;1344536317&lt;/date&gt; &lt;/song&gt; &lt;song&gt; &lt;title&gt; &lt;![CDATA[ Turn On Switch Off (Starring Valerie Trebeljahr) ]]&gt; &lt;/title&gt; &lt;artist&gt; &lt;![CDATA[ Static ]]&gt; &lt;/artist&gt; &lt;album&gt; &lt;![CDATA[ Flavour Has No Name ]]&gt; &lt;/album&gt; &lt;albumart&gt; &lt;![CDATA[ ]]&gt; &lt;/albumart&gt; &lt;date&gt;1344536000&lt;/date&gt; &lt;/song&gt; &lt;song&gt; &lt;title&gt; &lt;![CDATA[ Aim Low ]]&gt; &lt;/title&gt; &lt;artist&gt; &lt;![CDATA[ Sheik &amp; Beige ]]&gt; &lt;/artist&gt; &lt;album&gt; &lt;![CDATA[ Sty Wars - A Collection of Por ]]&gt; &lt;/album&gt; &lt;albumart&gt; &lt;![CDATA[ ]]&gt; &lt;/albumart&gt; &lt;date&gt;1344531485&lt;/date&gt; &lt;/song&gt; &lt;/songs&gt; </code></pre> <p>and my code: (I want to retrieve the first list item only, as the feed is updated as the song changes and I want the currently playing song which is always at the top of the list)</p> <pre><code> package com.example.networking; import android.app.Activity; import android.os.Bundle; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import android.util.Log; import android.widget.ImageView; import android.widget.Toast; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import java.io.InputStreamReader; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class NetworkingActivity extends Activity { private InputStream OpenHttpConnection(String urlString) throws IOException { InputStream in = null; int response = -1; URL url = new URL(urlString); URLConnection conn = url.openConnection(); if (!(conn instanceof HttpURLConnection)) throw new IOException("Not an HTTP connection"); try{ HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction(false); httpConn.setInstanceFollowRedirects(true); httpConn.setRequestMethod("GET"); httpConn.connect(); response = httpConn.getResponseCode(); if (response == HttpURLConnection.HTTP_OK) { in = httpConn.getInputStream(); } } catch (Exception ex) { Log.d("Networking", ex.getLocalizedMessage()); throw new IOException("Error connecting"); } return in; } private String WordDefinition(String word) { InputStream in = null; String strDefinition = ""; try { in = OpenHttpConnection( "http://api.somafm.com/songs/groovesalad.xml"); Document doc = null; DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db; try { db = dbf.newDocumentBuilder(); doc = db.parse(in); } catch (ParserConfigurationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } doc.getDocumentElement().normalize(); //---retrieve all the &lt;song&gt; elements--- NodeList definitionElements = doc.getElementsByTagName("song"); //---iterate through each &lt;song&gt; elements--- for (int i = 0; i &lt; definitionElements.getLength(); i++) { Node itemNode = definitionElements.item(i); if (itemNode.getNodeType() == Node.ELEMENT_NODE) { //---convert the song node into an Element--- Element definitionElement = (Element) itemNode; //---get all the &lt;artist&gt; elements under // the &lt;song&gt; element--- NodeList wordDefinitionElements = (definitionElement).getElementsByTagName( "artist"); strDefinition = ""; //---iterate through each &lt;artist&gt; elements--- for (int j = 0; j &lt; wordDefinitionElements.getLength(); j++) { //---convert an &lt;artist&gt; node into an Element--- Element wordDefinitionElement = (Element) wordDefinitionElements.item(j); //---get all the child nodes under the // &lt;artist&gt; element--- NodeList textNodes = ((Node) wordDefinitionElement).getChildNodes(); strDefinition += ((Node) textNodes.item(0)).getNodeValue() + ". \n"; } } } } catch (IOException e1) { Log.d("NetworkingActivity", e1.getLocalizedMessage()); } //---return the definitions of the word--- return strDefinition; } private class AccessWebServiceTask extends AsyncTask&lt;String, Void, String&gt; { protected String doInBackground(String... urls) { return WordDefinition(urls[0]); } protected void onPostExecute(String result) { Toast.makeText(getBaseContext(), result, Toast.LENGTH_LONG).show(); } } /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //---access a Web Service using GET--- new AccessWebServiceTask().execute("apple"); } } </code></pre> <p>Thank you if anyone can help me!</p>
 

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