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我是編程新手，所以請在我身上輕鬆一下，我一直在用一個簡單的RSS閱讀器搞砸，試圖獲得artice的鏈接，以在用戶點擊時在webview中打開文章。隔離RSS Feed中的鏈接
我找到了控制和存儲鏈接的字符串，但是當我嘗試打印鏈接時，鏈接出現了，但整篇文章的發佈日期等...我如何獲得打印鏈接自己做什麼，命令我需要使用通過鏈接到網頁視圖一旦我已經分離了，這裏是一些代碼我有
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處理器
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;
}
}
感謝您的回覆，在行JSONObeject o = this.getlistAdapter我得到的錯誤無法從對象轉換爲JSONObject在webview方法我得到不能靜態引用非靜態webview.loadurl（鏈接）; – JonniBravo 2011-06-07 07:44:04
我編輯我的答案是更確切一點。我的第一個剪輯不是爲了複製粘貼。請記住，您需要將NameOfLinkInJsonObject更改爲包含該鏈接的JSON對象中的字段名稱。 – 2011-06-07 14:50:13
謝謝賈斯汀我相信我將能夠得到這個工作我很感激 – JonniBravo 2011-06-08 16:10:25