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我需要解析这个 xml 文件并需要在列表视图中显示，但是在运行这段代码时遇到了问题。任何人请帮我解决这个问题提前谢谢你

这是来自源http://purl.org/dc/elements/1.1/ “version="2.0"的 XML 文件

<rss xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
  <channel>
    <title>MobileNations</title>
    <description>
      Mobile Nations brings to you the very best of Android Central, CrackBerry.com, PreCentral.net, TiPb.com, and WPCentral
    </description>
    <link>http://www.mobilenations.com/</link>
    <language>en-us</language>
    <lastBuildDate>Wed, 07 Aug 2013 06:15:01 -0400</lastBuildDate>
    <pubDate>Wed, 07 Aug 2013 06:15:01 -0400</pubDate>
    <item>
      <title>
        AT&T activates new 4G LTE markets, expands coverage in others
      </title>
      <description>
        <p class="rtecenter"><img alt="AT&amp;T" class="lightbox2 imagecache-w680h550 aligncenter" src="http://cdn.androidcentral.com/sites/androidcentral.com/files/imagecache/w680h550/postimages/108579/att-store-2.jpg" /></p> <h3> Six new markets, expanded coverage in Washington, D.C. and San Francisco areas</h3> <p><a href="http://www.androidcentral.com/tags/att" title="AT&amp;T">AT&amp;T</a> sends word that it&#39;s switched on 4G LTE service in six new markets, while expanding coverage in two major cities.</p> <p>From today, AT&amp;T LTE&nbsp;should be available in&nbsp;&mdash;</p> <p><a href="http://www.androidcentral.com/att-activates-new-4g-lte-markets-expands-coverage-others" target="_blank">read more</a></p>
      </description>
      <link>
        http://www.androidcentral.com/att-activates-new-4g-lte-markets-expands-coverage-others
      </link>
      <pubDate>Wed, 07 Aug 2013 09:48:24 +0000</pubDate>
      <category domain="http://www.androidcentral.com/articles/news">News</category>
      <category domain="http://www.androidcentral.com/tags/4g">4g</category>
      <category domain="http://www.androidcentral.com/tags/att-0">at&t</category>
      <category domain="http://www.androidcentral.com/tags/lte">lte</category>
      <guid isPermaLink="false">32622 at http://www.androidcentral.com</guid>
      <comments>
        http://www.androidcentral.com/att-activates-new-4g-lte-markets-expands-coverage-others#comments
      </comments>
      <dc:creator>Alex Dobie</dc:creator>
    </item>

我的 DOM 解析器代码是

package com.wfwf.everestnewsapp.parser;

import java.net.MalformedURLException;
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.jsoup.Jsoup;
import org.jsoup.select.Elements;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

import android.util.Log;

public class DOMParser {

    private RSSFeed _feed = new RSSFeed();

    public RSSFeed parseXml(String xml) {

        URL url = null;
        try {
            url = new URL(xml);
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
        }

        try {
            // Create required instances
            DocumentBuilderFactory dbf;
            dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();

            // Parse the xml
            Document doc = db.parse(new InputSource(url.openStream()));
            doc.getDocumentElement().normalize();

            // Get all <item> tags.
            NodeList nl = doc.getElementsByTagName("item");
            int length = nl.getLength();

            Log.i("this is the test message"+length, xml);
            for (int i = 0; i < length; i++) {
                Node currentNode = nl.item(i);
                RSSItem _item = new RSSItem();

                NodeList nchild = currentNode.getChildNodes();
                int clength = nchild.getLength();

                Log.i("this is the test message total child nodes"+clength, xml);
                // Get the required elements from each Item
                // Ishwor changed the code j=0 and j= j+1
                for (int j = 0; j < clength; j = j + 1) {
                    Log.i("first child node name is"+nchild.item(j).getNodeName(), xml);

                    Node thisNode = nchild.item(j);
                    String theString = null;


                    //ishwor changed as
                    if (thisNode != null && thisNode.getFirstChild() != null) {
                        theString = thisNode.getFirstChild().getNodeValue();
                    }
                    if (theString != null) {

                        String nodeName = thisNode.getNodeName();



                        /*


                    String nodeName = thisNode.getNodeName();

                    //theString = nchild.item(j).getFirstChild().getNodeValue();

                    if(nchild.item(j).getFirstChild().getNodeValue()!=null){
                    //if (theString != null) {
                        //String nodeName = thisNode.getNodeName();


                         */
                        if ("title".equals(nodeName)) {
                            // Node name is equals to 'title' so set the Node
                            // value to the Title in the RSSItem.
                            _item.setTitle(theString);

                            Log.i("this is the test message"+theString, xml);

                        }

                        else if ("description".equals(nodeName)) {
                            _item.setDescription(theString);

                            Log.i("this is the test message"+theString, xml);

                            // Parse the html description to get the image url
                            String html = theString;
                            org.jsoup.nodes.Document docHtml = Jsoup.parse(html);
                            Elements imgEle = docHtml.select("img");
                            _item.setImage(imgEle.attr("src"));
                        }

                        else if ("pubDate".equals(nodeName)) {

                            // We replace the plus and zero's in the date with
                            // empty string
                            String formatedDate = theString.replace(" +0000",
                                    "");
                            _item.setDate(formatedDate);
                        }

                    }
                }

                // add item to the list
                _feed.addItem(_item);
            }

        } catch (Exception e) {
        }

        // Return the final feed once all the Items are added to the RSSFeed
        // Object(_feed).
        return _feed;
    }

}

我的日志猫错误是

08-08 12:52:55.059: W/dalvikvm(3484): threadid=11: thread exiting with uncaught exception (group=0x41a692a0)
08-08 12:52:55.064: E/AndroidRuntime(3484): FATAL EXCEPTION: AsyncTask #1
08-08 12:52:55.064: E/AndroidRuntime(3484): java.lang.RuntimeException: An error occured while executing doInBackground()
08-08 12:52:55.064: E/AndroidRuntime(3484):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.lang.Thread.run(Thread.java:856)
08-08 12:52:55.064: E/AndroidRuntime(3484): Caused by: java.lang.NoClassDefFoundError: org.jsoup.Jsoup
08-08 12:52:55.064: E/AndroidRuntime(3484):     at com.wfwf.everestnewsapp.parser.DOMParser.parseXml(DOMParser.java:102)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at com.wfwf.everestnewsapp.Splash$AsyncLoadXMLFeed.doInBackground(Splash.java:131)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at com.wfwf.everestnewsapp.Splash$AsyncLoadXMLFeed.doInBackground(Splash.java:1)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-08 12:52:55.064: E/AndroidRuntime(3484):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)

08-08 12:52:55.064: E/AndroidRuntime(3484):     ... 5 more
4

1 回答 1

0

试试这个例子...

    import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class XMLParsingDOMExample extends Activity {

    ArrayList<String> title;
    ArrayList<String> description;
    ArrayList<String> pubDate;

    ItemAdapter adapter1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ListView list = (ListView) findViewById(R.id.list);
        title = new ArrayList<String>();
        description = new ArrayList<String>();  
        pubDate = new ArrayList<String>();  

        try {

            URL url = new URL(
                    "Your URL");
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(new InputSource(url.openStream()));
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("item");
            for (int i = 0; i < nodeList.getLength(); i++) {

                Node node = nodeList.item(i);       

                Element fstElmnt = (Element) node;
                NodeList nameList = fstElmnt.getElementsByTagName("title");
                Element nameElement = (Element) nameList.item(0);
                nameList = nameElement.getChildNodes();         
                Log.v("title--", ""+ ((Node) nameList.item(0)).getNodeValue());
                title.add(""+ ((Node) nameList.item(0)).getNodeValue());

                NodeList websiteList = fstElmnt.getElementsByTagName("description");
                Element websiteElement = (Element) websiteList.item(0);
                websiteList = websiteElement.getChildNodes();
                Log.v("description--", ""+ ((Node) websiteList.item(0)).getNodeValue());            
                description.add(""+ ((Node) websiteList.item(0)).getNodeValue());   

                NodeList websiteList1 = fstElmnt.getElementsByTagName("pubDate");
                Element websiteElement1 = (Element) websiteList1.item(0);
                websiteList1 = websiteElement1.getChildNodes();

                pubDate.add(""+ ((Node) websiteList1.item(0)).getNodeValue());  

            }
        } catch (Exception e) {
            System.out.println("XML Pasing Excpetion = " + e);
        }

        adapter1 = new ItemAdapter(this);
        list.setAdapter(adapter1);
    }


    class ItemAdapter extends BaseAdapter {

        final LayoutInflater mInflater;

        private class ViewHolder {
            public TextView title_text;
            public TextView des_text;
            public TextView date_text;
        }

        public ItemAdapter(Context context) {
            // TODO Auto-generated constructor stub
            super();
            mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);     
        }

        //@Override
        public int getCount() {
            return title.size();
        }

        //@Override
        public Object getItem(int position) {
            return position;
        }

        //@Override
        public long getItemId(int position) {
            return position;
        }

        //@Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            View view = convertView;
            final ViewHolder holder;
            if (convertView == null) {
                view = mInflater.inflate(R.layout.mainpage_listitem_activity, parent, false);
                holder = new ViewHolder();
                holder.title_text = (TextView) view.findViewById(R.id.title_text);
                holder.des_text = (TextView) view.findViewById(R.id.des_text);
                holder.date_text = (TextView) view.findViewById(R.id.date_text);

                view.setTag(holder);
            } else {
                holder = (ViewHolder) view.getTag();
            }

            holder.title_text.setText(""+title.get(position));

            holder.des_text.setText(""+Html.fromHtml(description.get(position)));
            holder.date_text.setText(""+pubDate.get(position));         

        return view;
        }
    }
}
于 2013-08-09T05:04:32.653 回答