android - 使用 XMLPull Parser 进行 RSS 链接解析

Question

我正在开发一个完全基于 RSS FEED 的应用程序，我想使用 XML Parser 解析 RSS 链接，我遵循了一些教程并使用 XMLPull Parser 实现代码，但是当我想解析http://feeds.pcworld.com /pcworld/latestnews这个链接，我得到了正确的响应，但是当我想解析http://www.pokerlistings.com/feed/news这个链接时，解析器没有响应我..我不知道为什么？

我花了 1 周时间解决这个问题.. 请帮助我。

这是我的代码

MainActivity.java

 package com.rajeshvijayakumar.xmlpullparser;

    import java.util.ArrayList;
    import java.util.List;

    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.content.Context;
    import android.os.AsyncTask;
    import android.os.Bundle;
    import android.os.Handler;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemClickListener;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;
    import android.widget.TextView;

    import com.rajeshvijayakumar.model.RSSFeed;
    import com.rajeshvijayakumar.parser.NewsFeedParser;

    public class MainActivity extends Activity implements OnItemClickListener {

        private ListView mRssListView;
        private NewsFeedParser mNewsFeeder;
        private List<RSSFeed> mRssFeedList;
        private RssAdapter mRssAdap;

        private static final String TOPSTORIES ="http://www.pokerlistings.com/feed/blogs";


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.rss_feed_view);

            mRssListView = (ListView) findViewById(R.id.rss_list_view);
            mRssFeedList = new ArrayList<RSSFeed>();
            new DoRssFeedTask().execute(TOPSTORIES);


            mRssListView.setOnItemClickListener(this);
        }

        private class RssAdapter extends ArrayAdapter<RSSFeed> {
            private List<RSSFeed> rssFeedLst;

            public RssAdapter(Context context, int textViewResourceId, List<RSSFeed> rssFeedLst) {
                super(context, textViewResourceId, rssFeedLst);
                this.rssFeedLst = rssFeedLst;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {

                View view = convertView;
                RssHolder rssHolder = null;
                if (convertView == null) {
                    view = View.inflate(MainActivity.this, R.layout.rss_list_item, null);
                    rssHolder = new RssHolder();
                    rssHolder.rssTitleView = (TextView) view.findViewById(R.id.rss_title_view);
                    view.setTag(rssHolder);
                } else {
                    rssHolder = (RssHolder) view.getTag();
                }
                RSSFeed rssFeed = rssFeedLst.get(position);
                rssHolder.rssTitleView.setText(rssFeed.getTitle());
                return view;
            }
        }

        static class RssHolder {
            public TextView rssTitleView;
        }

        public class DoRssFeedTask extends AsyncTask<String, Void, List<RSSFeed>> {
            ProgressDialog prog;
            String jsonStr = null;
            Handler innerHandler;

            @Override
            protected void onPreExecute() {

                prog = new ProgressDialog(MainActivity.this);
                prog.setMessage("Loading....");
                prog.show();
            }

            @Override
            protected List<RSSFeed> doInBackground(String... params) {


                for (String urlVal : params) {

                    mNewsFeeder = new NewsFeedParser(urlVal);




                }

                mRssFeedList = mNewsFeeder.parse();

                return mRssFeedList;
            }

            @Override
            protected void onPostExecute(List<RSSFeed> result) {
                prog.dismiss();
                runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        mRssAdap = new RssAdapter(MainActivity.this, R.layout.rss_list_item,
                                mRssFeedList);
                        int count = mRssAdap.getCount();
                        if (count != 0 && mRssAdap != null) {
                            mRssListView.setAdapter(mRssAdap);
                        }
                    }
                });
            }

            @Override
            protected void onProgressUpdate(Void... values) {
            }
        }

        @Override
        public void onItemClick(AdapterView<?> adapterView, View v, int position, long id) {
        }
    }

RSSFeed.java

 package com.rajeshvijayakumar.model;

    import java.io.Serializable;
    import java.util.Date;

    public class RSSFeed implements Serializable {

        private String title;
        private String link;
        private String description;
        private String category;
        private String pubDate;
        private String guid;
        private String feedburnerOrigLink;

        public RSSFeed() {
        }

        public RSSFeed(String title, String link, String description, String category, String pubDate,
                String guid, String feedburnerOrigLink) {
            this.title = title;
            this.link = link;
            this.description = description;
            this.category = category;
            this.pubDate = pubDate;
            this.guid = guid;
            this.feedburnerOrigLink = feedburnerOrigLink;
        }

        public String getTitle() {
            return title;
        }

        public String getLink() {
            return link;
        }

        public String getDescription() {
            return description;
        }

        public String getCategory() {
            return category;
        }

        public String getPubDate() {
            return pubDate;
        }

        public String getGuid() {
            return guid;
        }

        public String getFeedburnerOrigLink() {
            return feedburnerOrigLink;
        }


        public void setTitle(String title) {
            this.title = title;
        }

        public void setLink(String link) {
            this.link = link;
        }

        public void setDescription(String description) {
            this.description = description;
        }

        public void setCategory(String category) {
            this.category = category;
        }

        public void setPubDate(String pubDate) {
            this.pubDate = pubDate;
        }

        public void setGuid(String guid) {
            this.guid = guid;
        }

        public void setFeedburnerOrigLink(String feedburnerOrigLink) {
            this.feedburnerOrigLink = feedburnerOrigLink;
        }

    }

NewsFeedParser.java

package com.rajeshvijayakumar.parser;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;

import com.rajeshvijayakumar.model.RSSFeed;

public class NewsFeedParser {
    private InputStream urlStream;
    private XmlPullParserFactory factory;
    private XmlPullParser parser;

    private List<RSSFeed> rssFeedList;
    private RSSFeed rssFeed;

    private String urlString;
    private String tagName;

    private String title;
    private String link;
    private String description;
    private String category;
    private String pubDate;
    private String guid;
    private String feedburner;



    public static final String ITEM = "item";
    public static final String CHANNEL = "channel";

    public static final String TITLE = "title";
    public static final String LINK = "link";
    public static final String DESCRIPTION = "description";
    public static final String CATEGORY = "category";
    public static final String PUBLISHEDDATE = "pubDate";
    public static final String GUID = "guid";
    public static final String FEEDBURNERORIGLINK = "feedburner:origLink";


    public NewsFeedParser(String urlString) {

        this.urlString = urlString;
    }

    public static InputStream downloadUrl(String urlString) throws IOException {



        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.connect();
        InputStream stream = conn.getInputStream();
        return stream;
    }

    public List<RSSFeed> parse() {
        try {


            int count = 0;
            factory = XmlPullParserFactory.newInstance();
            parser = factory.newPullParser();
          //  urlStream = downloadUrl(urlString);

            URL url = new URL("http://www.pokerlistings.com/feed/blogs");   
            parser.setInput(url.openConnection().getInputStream(), "UTF_8");


           // parser.setInput(urlStream, null);

//            URL url = new URL("http://www.rssboard.org/files/sample-rss-2.xml");        
//            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
//            factory.setNamespaceAware(false);
//            XmlPullParser xpp = factory.newPullParser();
//            xpp.setInput(url.openConnection().getInputStream(), "UTF_8"); 



            int eventType = parser.getEventType();


            boolean done = false;
            rssFeed = new RSSFeed();
            rssFeedList = new ArrayList<RSSFeed>();
            while (eventType != XmlPullParser.END_DOCUMENT && !done) {
                tagName = parser.getName();

                switch (eventType) {
                    case XmlPullParser.START_DOCUMENT:


                        break;
                    case XmlPullParser.START_TAG:
                        if (tagName.equals(ITEM)) {
                            rssFeed = new RSSFeed();
                        }
                        if (tagName.equals(TITLE)) {
                            title = parser.nextText().toString();
                        }
                        if (tagName.equals(LINK)) {
                            link = parser.nextText().toString();
                        }
                        if (tagName.equals(DESCRIPTION)) {
                            description = parser.nextText().toString();
                        }
                        if (tagName.equals(CATEGORY)) {
                            category = parser.nextText().toString();
                        }
                        if (tagName.equals(PUBLISHEDDATE)) {
                            pubDate = parser.nextText().toString();
                        }
                        if (tagName.equals(GUID)) {
                            guid = parser.nextText().toString();
                        }
                        if (tagName.equals(FEEDBURNERORIGLINK)) {
                            feedburner = parser.nextText().toString();
                        }
                        break;
                    case XmlPullParser.END_TAG:


                        System.out.println(">>>>>>> NewsFeedParser END TAG");

                        if (tagName.equals(CHANNEL)) {
                            done = true;
                        } else if (tagName.equals(ITEM)) {

                            rssFeed = new RSSFeed(title, link, description, category, pubDate,
                                    guid,
                                    feedburner);
                            rssFeedList.add(rssFeed);
                        }
                        break;
                }

                eventType = parser.nextToken();
                //eventType = parser.next();
              //  eventType++;
                System.out.println(">>>>>>> NewsFeedParser parse method event type in ="+eventType);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return rssFeedList;

    }
}

提前致谢