怎麼辦使用SAX解析器解析嵌套在Android中

Question

我有這樣一個xml：

<channel> 
    <item> 
     <link>http://uopnews.unipune.ac.in/Lists/Calendar/DispForm.aspx?ID=14</link> 
     <description><![CDATA[<div><b>Location:</b> PUMBA Auditorium - University of Pune</div> <div><b>Start Time:</b> 5/15/2012 11:00 AM</div> 
<div><b>End Time:</b> 5/15/2012 2:00 PM</div> 
<div><b>Description:</b> <div>General B. C. Joshi Memorial Lecture 2012- Perspective on War in the 21st Century - By Lt. Gen. A. K. Singh</div></div> 
<div><b>Attachments:</b> <a href="http://uopnews.unipune.ac.in/Lists/Calendar/Attachments/14/bcjoshi2012[1].pdf">http://uopnews.unipune.ac.in/Lists/Calendar/Attachments/14/bcjoshi2012[1].pdf</a><br><a href=""></a></div> 
]]></description> 
    </item> 
</channel> 

我可以使用SAX解析器，這裏是我SAXhandler類高達描述標籤解析。

import java.net.URL; 
import java.util.ArrayList; 
import java.util.HashMap; 

import javax.xml.parsers.SAXParser; 
import javax.xml.parsers.SAXParserFactory; 

import org.xml.sax.Attributes; 
import org.xml.sax.InputSource; 
import org.xml.sax.SAXException; 
import org.xml.sax.XMLReader; 
import org.xml.sax.helpers.DefaultHandler; 

import android.R.string; 
import android.util.Log; 

public class XMLParsingHandler extends DefaultHandler { 
    private static final String NEW_DATA_SET = "image"; 
    private String currentValue = ""; 
    private String currentTag = ""; 
    private HashMap<String, Object> root; 
    private HashMap<String, String> child; 
    private String[] tagArray = null; 
    private ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>(); 
    private String describe; 

    public XMLParsingHandler(String[] tagArray) { 
     this.tagArray = tagArray; 
    } 

    public void parseContent(String urlStr) { 
     try { 
      URL url = new URL(urlStr); 
      SAXParserFactory saxParserFactory = SAXParserFactory.newInstance(); 
      SAXParser saxParser = saxParserFactory.newSAXParser(); 
      XMLReader xmlReader = saxParser.getXMLReader(); 
      xmlReader.setContentHandler(this); 
      xmlReader.parse(new InputSource(url.openStream())); 
      Log.d("PRASER", "Afer parsering done" + arraylist); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    public void startDocument() throws SAXException { 
     super.startDocument(); 
     root = new HashMap<String, Object>(); 
     System.out.println("root=" + root); 
    } 

    @Override 
    public void startElement(String uri, String localName, String qName, 
      Attributes attributes) throws SAXException { 
     super.startElement(uri, localName, qName, attributes); 
     Log.d("tag", "StartElement started here"); 
     currentTag = localName; 
     Log.d("start", "in start doc current atg---------: " + currentTag); 
     if (localName.equals(NEW_DATA_SET)) { 
      child = new HashMap<String, String>(); 
      currentValue = new String(); 
     } 

      describe=new String(); 

    } 

    @Override 
    public void characters(char[] ch, int start, int length) 
      throws SAXException { 
     super.characters(ch, start, length); 


     currentValue = new String(ch, start, length); 
     Log.d("other", "in CHARACTER : CurrentValue=---------" + currentValue 
       + " currentTag-------" + currentTag); 
     if(currentTag.equals("description")) { 
      String str=  new String(ch, start, length); 
      //describe=new String(); 
      describe=describe+""+currentValue; 
      Log.d("describe", "in CHARACTER : describe=---------" + describe); 

     } 
    } 

    @Override 
    public void endElement(String uri, String localName, String qName) 
      throws SAXException { 
     super.endElement(uri, localName, qName); 
     Log.d("end", "currentTag:"+currentTag+"------currentValue"+currentValue); 
     if(child!=null) 
     { 
     for (int i = 0; i < tagArray.length; i++) { 
      if (currentTag.equals("description")){ 
       child.put(currentTag, currentValue); 
      } 
      if (currentTag.equals(tagArray[i])) 
      { 
       child.put(currentTag, currentValue); 
       Log.d("tagarray","currentTag="+ currentTag+"currentValue:"+currentValue); 

       currentValue=null; 
       currentValue=new String(); 
       currentTag=null; 
       currentTag=new String(); 
      } 

     } 

     if (localName.equals(tagArray[tagArray.length - 1])) { 
      arraylist.add(child); 
      child=null; 
      child=new HashMap<String, String>(); 
     } 


     } 
    } 

    @Override 
    public void endDocument() throws SAXException { 
     super.endDocument(); 
     Log.d("tag", "in end doc"); 

    } 


    public ArrayList<HashMap<String, String>> getArraylist() { 
     return arraylist; 
    } 


    public void setArraylist(ArrayList<HashMap<String, String>> arraylist) { 
     this.arraylist = arraylist; 
    } 
    @Override 
    public String toString() { 
     return arraylist.toString(); 
    } 

} 

，我稱它是這樣的：

userMap = new HashMap<String, String>(); 

     XMLParsingHandler x = new XMLParsingHandler(tagArray); 
     x.parseContent(url); 
     System.out.println("Element FOund"); 
     userMap = x.getArraylist().get(0); 
     System.out.println("Map " + userMap); 

這裏我只中userMap打印VALU高達描述標籤只顯示空值之後。我需要描述中的所有數據。有什麼辦法嗎？

Answer 1

找到下面的SAX解析器代碼

public class IndianNewsHandler implements ContentHandler { 
private String value = ""; 
private Item item = null; 
private TextView tvRef = null; 
private Activity myActivity = null; 

private static IndianNewsHandler mIndianNewsHandler; 

public static IndianNewsHandler getInstance() { 
    if (mIndianNewsHandler == null) { 
     mIndianNewsHandler = new IndianNewsHandler(); 
    } 
    return mIndianNewsHandler; 
} 

private IndianNewsHandler() { 

} 

private ArrayList<Item> content = new ArrayList<Item>(); 
// private ArrayList<String> myList = new ArrayList<String>(); 
private boolean STATUS_PARSE = true; 
private boolean ITEM_STATUS = false; 

public ArrayList<Item> getData() { 
    return content; 
} 

public void startElement(String namespaceURI, String localName, 
     String qName, Attributes atts) throws SAXException { 

    if (STATUS_PARSE) { 
     this.value = localName; 

     if (localName.equals("item")) { 

      item = new Item(); 
      ITEM_STATUS = true; 
     } 

    } 
} 

public void characters(char[] text, int start, int length) 
     throws SAXException { 
    if (STATUS_PARSE && ITEM_STATUS) { 
     StringBuffer buffer = new StringBuffer(); 
     buffer.append(text, 0, length); 

     if (buffer != null) { 

      if (this.value.equals("title")) { 
       System.out.println("I am in title" 
         + buffer.toString().trim()); 
       if (buffer.toString().trim().length() > 1) 
        item.setTitle(buffer.toString().trim()); 

      } else if (value.equals("description")) 

      { 

       String url = buffer.toString().trim(); 

       try { 

        if (url.contains("img src=")) { 
         final String url_string = url.split("img src=")[1] 
           .split(">")[0].replace("'", ""); 
         System.out.println("FInal URL :" + url_string); 
         if (url_string != null) { 
          //here i am creating async task for convert image 
          new CovertingImageToByte(url_string).execute(); 


          if (buffer.toString().trim().length() > 1) { 
           String des = buffer.toString().split(">")[1]; 
           item.setDes(des); 
          } 
         } 
        } 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
      } 
     } 

    } 
} 
class CovertingImageToByte extends AsyncTask<String,Integer, String>{ 
    String imageUrl; 
    public CovertingImageToByte(String urlString) { 
     this.imageUrl=urlString; 
    } 

    @Override 
    protected String doInBackground(String... params) { 
     try { 
      InputStream is = new URL(imageUrl) 
        .openStream(); 

      Bitmap bitmap = BitmapFactory 
        .decodeStream(is); 
      byte[] mybyt = null; 
      ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
      bitmap.compress(CompressFormat.PNG, 
        0, stream); 
      mybyt = stream.toByteArray(); 

      System.out.println("test" 
        + mybyt.length); 

      item.setImg(mybyt); 
      // System.out.println("Finallly List123 size ::::::::::"+content.get(0).getImg().length); 

     } catch (MalformedURLException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
       return null; 
    } 

} 

public void endElement(String namespaceURI, String localName, String qName) 
     throws SAXException { 
    if (STATUS_PARSE) { 
     if (localName.equals("item")) { 
      content.add(item); 
     } 

     if (content.size() >= 15) { 
      STATUS_PARSE = false; 
     } 
    } 

} 

@Override 
// do nothing methods 
public void setDocumentLocator(Locator locator) { 
} 

public void startDocument() throws SAXException { 
} 

public void endDocument() throws SAXException { 
    System.out.println("Finallly List size ::::::::::" + content.get(1)); 
} 

public void startPrefixMapping(String prefix, String uri) 
     throws SAXException { 
} 

public void endPrefixMapping(String prefix) throws SAXException { 
} 

public void skippedEntity(String name) throws SAXException { 
} 

public void ignorableWhitespace(char[] text, int start, int length) 
     throws SAXException { 
} 

public void processingInstruction(String target, String data) 
     throws SAXException { 
} 

}