隔离RSS Feed中的链接

Question

我是编程的新手，所以请放轻松我，我一直在搞一个简单的RSS阅读器，试图在用户点击文章时获取artview的链接在webview中打开。

我找到了控制和存储链接的字符串，但是当我尝试在toast中打印链接时，链接出现但整篇文章发布日期等...如何获得自己打印的链接一旦我将其链接到webview，我需要使用哪些命令将链接传递给webview，这里有一些我有的代码

RSSActivity

public class RssActivity extends ListActivity {
    private RssListAdapter adapter; 

        /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        List<JSONObject> jobs = new ArrayList<JSONObject>();
        try {
            jobs = RssReader.getLatestRssFeed();
        } catch (Exception e) {
            Log.e("RSS ERROR", "Error loading RSS Feed Stream >> " + e.getMessage() + " //" + e.toString());
        }

        adapter = new RssListAdapter(this,jobs);
        setListAdapter(adapter);
    }
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        // Get the item that was clicked
        Object o = this.getListAdapter().getItem(position);
        adapter.getItem(position).toString();
        String link = o.toString();


        Toast.makeText(this, "You selected: " + link, Toast.LENGTH_LONG)
                .show();


    }

}

Article.class

    public class Article {

    private long articleId;
    private long feedId;
    private String title;
    private String description;
    private String pubDate;
    private URL url;
    private String encodedContent;
    private String link;


    public void setArticleId(long articleId) {
        this.articleId = articleId;
    }
    /**
     * @return the feedId
     */
    public long getFeedId() {
        return feedId;
    }
    /**
     * @param feedId the feedId to set
     */
    public void setFeedId(long feedId) {
        this.feedId = feedId;
    }
    public String getLink() {
        return link;
    }
    /**
     * @param title the title to set
     */
    public void setLink(String link) {
        this.link = link;
    }
    /**
     * @return the title
     */
    public String getTitle() {
        return title;
    }
    /**
     * @param title the title to set
     */
    public void setTitle(String title) {
        this.title = title;
    }
    /**
     * @return the url
     */
    public URL getUrl() {
        return url;
    }
    /**
     * @param url the url to set
     */
    public void setUrl(URL url) {
        this.url = url;
    }
    /**
     * @param description the description to set
     */
    public void setDescription(String description) {
        this.description = description;

        //parse description for any image or video links
        if (description.contains("<img ")){
            String img  = description.substring(description.indexOf("<img "));
            String cleanUp = img.substring(0, img.indexOf(">")+1);

            int indexOf = img.indexOf("'");
            if (indexOf==-1){

            }


            this.description = this.description.replace(cleanUp, "");
        }
    }
    /**
     * @return the description
     */
    public String getDescription() {
        return description;
    }
    /**
     * @param pubDate the pubDate to set
     */
    public void setPubDate(String pubDate) {
        this.pubDate = pubDate;
    }
    /**
     * @return the pubDate
     */
    public String getPubDate() {
        return pubDate;
    }
    /**
     * @param encodedContent the encodedContent to set
     */
    public void setEncodedContent(String encodedContent) {
        this.encodedContent = encodedContent;
    }
    /**
     * @return the encodedContent
     */
    public String getEncodedContent() {
        return encodedContent;
    }
}

RSS处理程序

    public class RSSHandler extends DefaultHandler {

    // Feed and Article objects to use for temporary storage
    private Article currentArticle = new Article();
    private List<Article> articleList = new ArrayList<Article>();

    // Number of articles added so far
    private int articlesAdded = 0;

    // Number of articles to download
    private static final int ARTICLES_LIMIT = 15;

    //Current characters being accumulated
    StringBuffer chars = new StringBuffer();    

    public void startElement(String uri, String localName, String qName, Attributes atts) {
        chars = new StringBuffer();
    }

    public void endElement(String uri, String localName, String qName) throws SAXException {

        if (localName.equalsIgnoreCase("title"))
        {
            Log.d("LOGGING RSS XML", "Setting article title: " + chars.toString());
            currentArticle.setTitle(chars.toString());

        }
        else if (localName.equalsIgnoreCase("description"))
        {
            Log.d("LOGGING RSS XML", "Setting article description: " + chars.toString());
            currentArticle.setDescription(chars.toString());
        }
        else if (localName.equalsIgnoreCase("pubDate"))
        {
            Log.d("LOGGING RSS XML", "Setting article published date: " + chars.toString());
            currentArticle.setPubDate(chars.toString());
        }
        else if (localName.equalsIgnoreCase("encoded"))
        {
            Log.d("LOGGING RSS XML", "Setting article content: " + chars.toString());
            currentArticle.setEncodedContent(chars.toString());
        }
        else if (localName.equalsIgnoreCase("item"))
        {

        }
        else if (localName.equalsIgnoreCase("link"))
        {
            Log.d("LOGGING RSS XML", "Setting article link: " + chars.toString());
            currentArticle.setLink(chars.toString());
            try {
                Log.d("LOGGING RSS XML", "Setting article link url: " + chars.toString());
                currentArticle.setUrl(new URL(chars.toString()));
            } catch (MalformedURLException e) {
                Log.e("RSA Error", e.getMessage());
            }
        }

        // Check if looking for article, and if article is complete
        if (localName.equalsIgnoreCase("item")) {

            articleList.add(currentArticle);

            currentArticle = new Article();

            // Lets check if we've hit our limit on number of articles
            articlesAdded++;
            if (articlesAdded >= ARTICLES_LIMIT)
            {
                throw new SAXException();
            }
        }
    }

    public void characters(char ch[], int start, int length) {
        chars.append(new String(ch, start, length));
    }

    public List<Article> getLatestArticles(String feedUrl) {
        URL url = null;
        try {

            SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser sp = spf.newSAXParser();
            XMLReader xr = sp.getXMLReader();

            url = new URL(feedUrl);

            xr.setContentHandler(this);
            xr.parse(new InputSource(url.openStream()));


        } catch (IOException e) {
            Log.e("RSS Handler IO", e.getMessage() + " >> " + e.toString());
        } catch (SAXException e) {
            Log.e("RSS Handler SAX", e.toString());
        } catch (ParserConfigurationException e) {
            Log.e("RSS Handler Parser Config", e.toString());
        }

        return articleList;
    }

}

public class RssReader {

    private final static String BOLD_OPEN = "<B>";
    private final static String BOLD_CLOSE = "</B>";
    private final static String BREAK = "<BR>";
    private final static String ITALIC_OPEN = "<I>";
    private final static String ITALIC_CLOSE = "</I>";
    private final static String SMALL_OPEN = "<SMALL>";
    private final static String SMALL_CLOSE = "</SMALL>";
    private final static String WEB_LINK = "<A>";
    private final static String WEB_CLOSE = "<A/";

    public static List<JSONObject> getLatestRssFeed(){
        String feed = "http://newsrss.bbc.co.uk/rss/sportonline_uk_edition/football/eng_prem/rss.xml";

        RSSHandler rh = new RSSHandler();
        List<Article> articles =  rh.getLatestArticles(feed);
        Log.e("RSS ERROR", "Number of articles " + articles.size());
        return fillData(articles);
    }


    private static List<JSONObject> fillData(List<Article> articles) {

        List<JSONObject> items = new ArrayList<JSONObject>();
        for (Article article : articles) {
            JSONObject current = new JSONObject();
            try {
                buildJsonObject(article, current);
            } catch (JSONException e) {
                Log.e("RSS ERROR", "Error creating JSON Object from RSS feed");
            }
            items.add(current);
        }

        return items;
    }

    private static void buildJsonObject(Article article, JSONObject current) throws JSONException {
        String link = article.getLink();
        String title = article.getTitle();
        String description = article.getDescription();
        String date = article.getPubDate();


        StringBuffer sb = new StringBuffer();
        sb.append(BOLD_OPEN).append(title).append(BOLD_CLOSE);
        sb.append(BREAK);
        sb.append(description);
        sb.append(BREAK);
        sb.append(SMALL_OPEN).append(ITALIC_OPEN).append(date).append(ITALIC_CLOSE).append(SMALL_CLOSE);
        sb.append(BREAK);
        sb.append(BREAK);
        sb.append(BOLD_OPEN).append(WEB_LINK).append(link).append(BOLD_CLOSE).append(WEB_CLOSE);
        current.put("link", link);

        current.put("text", Html.fromHtml(sb.toString()));

    }
}

RssListAdapter

import java.util.List;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.text.Spanned;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class RssListAdapter extends ArrayAdapter<JSONObject> {

    public RssListAdapter(Activity activity, List<JSONObject> imageAndTexts) {
        super(activity, 0, imageAndTexts);
    }


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

        Activity activity = (Activity) getContext();
        LayoutInflater inflater = activity.getLayoutInflater();

        // Inflate the views from XML
        View rowView = inflater.inflate(R.layout.image_text_layout, null);
        JSONObject jsonImageText = getItem(position);

        //////////////////////////////////////////////////////////////////////////////////////////////////////
        //The next section we update at runtime the text - as provided by the JSON from our REST call
        ////////////////////////////////////////////////////////////////////////////////////////////////////
        TextView textView = (TextView) rowView.findViewById(R.id.job_text);

        try {
            Spanned text = (Spanned)jsonImageText.get("text");
            textView.setText(text);

        } catch (JSONException e) {
            textView.setText("JSON Exception");
        }

        return rowView;

    } 

}

Answer 1

Open URL in default browser Open URL with Android

如果您在某一时刻拥有URL或URI对象，则上述链接中的一个解释可能会让您继续前进。

- 编辑：

protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    // Get the item that was clicked
    Object o = this.getListAdapter().getItem(position);
    adapter.getItem(position).toString();
    String link = o.toString();
    Toast.makeText(this, "You selected: " + link, Toast.LENGTH_LONG)
            .show();
}

猜测这是显示链接的代码，但是如果你没有提供我们getListAdapter（）方法等的内容，那么我担心你很难帮助你。

Answer 2

试试这个

protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        // Get the item that was clicked
        JSONObject o = (JSONObject) this.getListAdapter().getItem(position);
        adapter.getItem(position).toString();
        String link = o.getString("NameOfLinkInJsonObject");


        Toast.makeText(this, "You selected: " + link, Toast.LENGTH_LONG)
                .show();

        mMyWebView.loadUrl(link);
    }

请注意，您需要修复“NameOfLinkInJsonObject”。

在您的活动中添加一个类似的字段

private WebView mMyWebView;

在onCreate方法中添加

mMyWebView = (WebView) findViewById(R.id.webViewId);

您必须将R.id.webViewId更改为您的网络视图的相应ID。