Android XML Parsing omitting “&”

问题

The problem again is that though i have succesfully implemented a SAX parser in my code... It is behaving wierdly. It jus skips the enteries after the & and goes to the next entry. Just wanted to know whether this is the typical working of SAX parser or m i implementing it wrongly???

I have implemented org.xml.sax.ContentHandler and have provided the following coding inside...

`

public void characters(char[] ch, int start, int length)
         {
             if(lastName.equals("id"))
             {
                 String id = String.copyValueOf(ch, start, length);
                 CustomList.idvector.add(id);
             }
             else if(lastName.equals("subcategory"))
             {
                String subcategory = String.copyValueOf(ch, start, length);
                 CustomList.subcategoryvector.add(subcategory);
             }
             else if(lastName.equals("photo"))
             {
                 String photo = String.copyValueOf(ch, start, length);
                 CustomList.photovector.add(photo);
             }
             else if(lastName.equals("name"))
             {
                 String name = String.copyValueOf(ch, start, length);
                 CustomList.namevector.add(name);
             }
         }

`

There are elements with tags ,,,... and m taking those info into a vector... is this correct???

Now again problem is that i cant parse special character like "$" and such... is there any way we can catch these characters??

回答1:

Not quite sure exactly what you're seeing, if this doesn't help deal with your problem maybe you could provide some sample input and output.

& is an XML entity reference and means &.

By default, SAX will do the conversion for you, so if your source XML says hello&goodbye you should see hello&goodbye.

It may also be that SAX is breaking up the calls to the characters() method because of the entity reference. You may need to concatenate multiple calls to characters() together whilst still inside the same tag.

回答2:

This worked 4 me guys... Thanx Brabster...

public void characters(char[] ch, int start, int length)
             {
                 if(lastName.equals("id") && (lastName != lastElementTraversed))
                 {
                     String s = new String(ch, start, length);
                     if (appendedid == null) 
                     {
                         appendedid = new StringBuffer(s);
                     } else {
                          appendedid.append(s);
                     }

                 }
            else if(lastName.equals("subcategory")&& (lastName !=lastElementTraversed))
                 {
                     String s = new String(ch, start, length);
                     if (appendedsub == null) {
                         appendedsub = new StringBuffer(s);
                      } else {
                          appendedsub.append(s);
                      }
                     //lastElementTraversed = lastName;
                 }
            else if(lastName.equals("photo")&& (lastName != lastElementTraversed))
                 {
                     String s = new String(ch, start, length);
                      if (appendedphoto == null) {
                          appendedphoto = new StringBuffer(s);
                      } else {
                          appendedphoto.append(s);
                      }
                      //lastElementTraversed = lastName;
                 }
            else if(lastName.equals("name") && (lastName != lastElementTraversed))
                 {
                     String s = new String(ch, start, length);
                      if (appendedname == null) {
                          appendedname = new StringBuffer(s);
                      } else {
                          appendedname.append(s);
                      } 
                      //lastElementTraversed = lastName;
                 }
             }
    public void startElement(String uri, String localName, String qName, Attributes atts)
            {
                lastName = localName;
                appendedid=null;
                appendedsub=null;
                appendedphoto=null;
                appendedname=null;

            }

             public void endElement(String uri, String localName, String qName)
             {
                 lastElementTraversed = localName;
                 if(localName.equals("category"))
                    {
                        appendedid=null;
                        appendedsub=null;
                        appendedphoto=null;
                        appendedname=null;

                    }

                     if(appendedid!=null)
                     CustomList.idvector.add(appendedid.toString());
                     if(appendedsub!=null)
                     CustomList.subcategoryvector.add(appendedsub.toString());
                     if(appendedphoto!=null)
                     CustomList.photovector.add(appendedphoto.toString());
                     if(appendedname!=null)
                     CustomList.namevector.add(appendedname.toString());

             }
        }

来源：https://stackoverflow.com/questions/1973483/android-xml-parsing-omitting-amp