我有一个简单的RSS阅读器，显示来自给定Feed的项目，我遇到的问题是我不知道如何获取新闻项目的URL，以便当用户点击它在webview，我知道如何将一个字符串传递给另一个类打开一个webview等...但我不知道如何获取该URL以便我可以打开该项目。下面是文章类;
public static List<JSONObject> getLatestRssFeed(){
String feed = "http://globoesporte.globo.com/dynamo/futebol/times/vasco/rss2.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 title = article.getTitle();
String description = article.getDescription();
String date = article.getPubDate();
String imgLink = article.getImgLink();
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);
current.put("text", Html.fromHtml(sb.toString()));
current.put("imageLink", imgLink);
}
}
这是rsshandler类;
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();
/*
* This method is called everytime a start element is found (an opening XML marker)
* here we always reset the characters StringBuffer as we are only currently interested
* in the the text values stored at leaf nodes
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String uri, String localName, String qName, Attributes atts) {
chars = new StringBuffer();
}
/*
* This method is called everytime an end element is found (a closing XML marker)
* here we check what element is being closed, if it is a relevant leaf node that we are
* checking, such as Title, then we get the characters we have accumulated in the StringBuffer
* and set the current Article's title to the value
*
* If this is closing the "Item", it means it is the end of the article, so we add that to the list
* and then reset our Article object for the next one on the stream
*
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
*/
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"))
{
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();
}
}
}
/*
* This method is called when characters are found in between XML markers, however, there is no
* guarante that this will be called at the end of the node, or that it will be called only once
* , so we just accumulate these and then deal with them in endElement() to be sure we have all the
* text
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#characters(char[], int, int)
*/
public void characters(char ch[], int start, int length) {
chars.append(new String(ch, start, length));
}
/**
* This is the entry point to the parser and creates the feed to be parsed
*
* @param feedUrl
* @return
*/
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;
}
}
这是文章类;
public class Article {
private long articleId;
private long feedId;
private String title;
private String description;
private String imgLink;
private String pubDate;
private URL url;
private String encodedContent;
/**
* @return the articleId
*/
public long getArticleId() {
return articleId;
}
/**
* @param articleId the articleId to set
*/
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;
}
/**
* @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);
img = img.substring(img.indexOf("src=") + 5);
int indexOf = img.indexOf("'");
if (indexOf==-1){
indexOf = img.indexOf("\"");
}
img = img.substring(0, indexOf);
setImgLink(img);
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;
}
/**
* @param imgLink the imgLink to set
*/
public void setImgLink(String imgLink) {
this.imgLink = imgLink;
}
/**
* @return the imgLink
*/
public String getImgLink() {
return imgLink;
}
}
答案 0 :(得分：0)
谢谢Yeradis，我只是将其添加到代码中;
在Handler类中：
else if (localName.equalsIgnoreCase("link"))
{
Log.d("LOGGING RSS XML", "Setting article link: " + chars.toString());
currentArticle.setLink(chars.toString());
在文章类中：
private String link;
public String getLink() {
return link;
}
/**
* @param title the title to set
*/
public void setLink(String link) {
this.link = link;
}
并在Reader类中
String link = article.getLink();
current.put("link", link);