Parsing XML from the Net - Using the SAXParser

jhandal7 · by **jhandal7** » Tue Apr 07, 2009 2:33 am

[b] bstubbs wrote:
Artur79, did you ever figure out how to solve the missing string?

I'm getting the same results:

Quote:

ExtractedString =
ExtractedInt = 1337

Anyone else getting this, found a solution? Thanks

Hi
I meet the same proplem.

Chnage the xml file from
XML:
<mytag>
anddev.org rulez =)
</mytag>

to
XML:
<mytag>anddev.org rulez =)</mytag>

That works.

Damn, had the same problem. After changing to inline as you said, it works. It is weird imo, valid xml is valid xml.
_________________
---
Dariusz Dwornikowski

[u]I am using SDK 1.0,this code need upgrade?

thanks

songotho · by **songotho** » Thu Apr 09, 2009 10:05 am

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

<Test>
<Student>
<Name>Jane</Name>
<Address>ABC</Adress>
<Age>20</Age>
</Student>
<School>
<Name>NTUST</Name>
<Adress>123</Adress>
</School>
</Test>
 
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

I have the same question with SeraphimSerapis
When I get the data in xml file: Gphone always gets the last data:
For example:
This is the information of student:
Name: NTUST
Adress: 123
Age:

So I want to get the data of student in xml file. How can I get it?
This is the information of student:
Name: Jane
Adress: ABC
Age: 20

Thanks,

-Alex

padde · by **padde** » Thu Apr 09, 2009 10:29 am

Well.. when you read the <Student> tag set a bool to true and on reading ending tag </student> set it false..
same with school tag. In the <name> tag reading case check which bool is set student or school and copy the
value of name to different variable or so.. according to the bool states.
Maybe there is a smarter solution to this.. but thats the way i solved those issues and it works like a charm for me.

Greets
Padde

songotho · by **songotho** » Thu Apr 09, 2009 2:57 pm

Thanks for your answer so if can, would you modify some code below:

Code: Select all: public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { if (localName.equals("Student")) { this.in_student = true; } if (localName.equals("Name")) { this.in_name = true; } if (localName.equals("Address")) { this.in_address = true; } if (localName.equals("Age")) { this.in_age = true; } } public void endElement(String namespaceURI, String localName, String qName) throws SAXException { if (localName.equals("Student")) { this.in_student = false; } if (localName.equals("Name")) { this.in_name = false; } if (localName.equals("Address")) { this.in_address = false; } if (localName.equals("Age")) { this.in_age = false; } } public void characters(char ch[], int start, int length) { if(this.in_race_name){ myParsedExampleDataSet.setName(new String(ch, start, length)); } if(this.in_name){ myParsedExampleDataSet.setAddress(new String(ch, start, length)); } if(this.in_price){ myParsedExampleDataSet.setAge(new String(ch, start, length)); } }

I tried it so it's error.

Thanks,

--Alex

padde · by **padde** » Thu Apr 09, 2009 6:47 pm

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Using java Syntax Highlighting

 
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
 
        if (localName.equals("Student")) {
 
           this.in_student = true;
 
        }
 
        if (localName.equals("School")) {
 
           this.in_school = true;
 
        }
 
        if (localName.equals("Name")) {
 
           this.in_name = true;
 
        }
 
        if (localName.equals("Address")) {   
 
           this.in_address = true;
 
        }
 
        if (localName.equals("Age")) {
 
           this.in_age = true;
 
        }       
 
    }
 
    public void endElement(String namespaceURI, String localName, String qName)
 
              throws SAXException {
 
        if (localName.equals("Student")) {
 
           this.in_student = false;
 
        }
 
        if (localName.equals("School")) {
 
           this.in_school = false;
 
        }
 
        if (localName.equals("Name")) {
 
           this.in_name = false;
 
        }
 
        if (localName.equals("Address")) {   
 
           this.in_address = false;
 
        }
 
        if (localName.equals("Age")) {
 
           this.in_age = false;
 
        }
 
    }
 
    public void characters(char ch[], int start, int length) {
 
        if(this.in_student) {
 
                // do stuff for student
 
                if(this.in_name){
 
                    myParsedExampleDataSet.setStudentName(new String(ch, start, length));
 
                }
 
                if(this.in_address){
 
                    myParsedExampleDataSet.setStudentAddress(new String(ch, start, length));
 
                }
 
                if(this.in_age) {
 
                    myParsedExampleDataSet.setStudentAge(new String(ch, start, length));
 
                }
 
        }
 
        if(this.in_school) {
 
                // do stuff for school
 
                if(this.in_name){
 
                    myParsedExampleDataSet.setSchoolName(new String(ch, start, length));
 
                }
 
                if(this.in_address){
 
                   myParsedExampleDataSet.setSchoolAddress(new String(ch, start, length));
 
                }            
 
        }
 
    }
 
Parsed in 0.016 seconds,  using GeSHi 1.0.8.4

somethin like that should do the trick...

Greets
Padde

songotho · by **songotho** » Thu Apr 09, 2009 10:25 pm

Thank padde about some codes. I'd like to work with xml file and I think that you have some experiences about xml. Would I ask you one more question:
If the xml file is not element, it is attribute. How can I do it?
For example:
<Test>
<Student>
<Name displayname = "Jane"></Name>
<Address displayname = "ABC"></Adress>
<Age value = "20"></Age>
</Student>
<School>
<Name displayname = "NTUST"></Name>
<Adress displayname = "123"></Adress>
</School>
</Test>

Thanks,

--Alex.

padde · by **padde** » Thu Apr 09, 2009 11:59 pm

something like this...

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Using java Syntax Highlighting

 
public void startElement(String namespaceURI, String localName, 
 
                                    String qName, Attributes atts) throws SAXException 
 
{
 
        if (localName.equals("Student")) {
 
           this.in_student = true;
 
        }
 
        if (localName.equals("School")) {
 
           this.in_school = true;
 
        }
 
        if (localName.equals("Name")) {
 
           if(this.in_student)
 
               myParsedExampleDataSet.setStudentName(atts.getValue("displayname")));
 
           if(this.in_school)
 
               myParsedExampleDataSet.setSchoolName(atts.getValue("displayname")));
 
        }
 
        if (localName.equals("Address")) {  
 
           if(this.in_student)
 
               myParsedExampleDataSet.setStudentAddress(atts.getValue("displayname")));
 
           if(this.in_school)
 
               myParsedExampleDataSet.setSchoolAddress(atts.getValue("displayname")));
 
        }
 
        if (localName.equals("Age")) {
 
           if(this.in_student)
 
               myParsedExampleDataSet.setStudentAge(atts.getValue("value")));
 
        }      
 
    }
 
    public void endElement(String namespaceURI, String localName, String qName)
 
              throws SAXException {
 
        if (localName.equals("Student")) {
 
           this.in_student = false;
 
        }
 
        if (localName.equals("School")) {
 
           this.in_school = false;
 
        }
 
    }
 
    public void characters(char ch[], int start, int length) { }
 
} 
 
Parsed in 0.014 seconds,  using GeSHi 1.0.8.4

Greets
Padde

songotho · by **songotho** » Fri Apr 10, 2009 5:12 am

Thanks padde about more codes. So I tried with your codes:

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Using java Syntax Highlighting

public void startElement(String namespaceURI, String localName,
                                    String qName, Attributes atts) throws SAXException
{
        if (localName.equals("Student")) {
           this.in_student = true;
        }
        if (localName.equals("School")) {
           this.in_school = true;
        }
        if (localName.equals("Name")) {
           if(this.in_student)
               myParsedExampleDataSet.setStudentName(atts.getValue("displayname")));
           if(this.in_school)
               myParsedExampleDataSet.setSchoolName(atts.getValue("displayname")));
        }
        if (localName.equals("Address")) {  
           if(this.in_student)
               myParsedExampleDataSet.setStudentAddress(atts.getValue("displayname")));
           if(this.in_school)
               myParsedExampleDataSet.setSchoolAddress(atts.getValue("displayname")));
        }
        if (localName.equals("Age")) {
           if(this.in_student)
               myParsedExampleDataSet.setStudentAge(atts.getValue("value")));
        }      
    }
   
    public void endElement(String namespaceURI, String localName, String qName)
              throws SAXException {
        if (localName.equals("Student")) {
           this.in_student = false;
        }
        if (localName.equals("School")) {
           this.in_school = false;
        }
    }
   
    public void characters(char ch[], int start, int length) { }
} 
 
Parsed in 0.014 seconds,  using GeSHi 1.0.8.4

And this is my ParsedExampleDataSet:

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Using java Syntax Highlighting

public class ParsedExampleDataSet {
        
    private String Name=null;
    private String Address=null;
    private String Age=null;
        
     private String extractedString = null;
     private int extractedInt = 0;
 
     public String getExtractedString() {
          return extractedString;
     }
     public void setExtractedString(String extractedString) {
          this.extractedString = extractedString;
     }
     public int getExtractedInt() {
          return extractedInt;
     }
     public void setExtractedInt(int extractedInt) {
          this.extractedInt = extractedInt;
     }
     public String toString(){
          return "ExtractedString = " + this.extractedString
                    + "nExtractedInt = " + this.extractedInt;
     }
     
//  ***********************************
    public String getStudentName(){
        return Name;     
       }
    public void setStudentName(String name){
        this.Name=name;
       }
   public String getSchoolName(){
        return Name;     
        }
   public void setSchoolName(String name){
        this.Name=name;
        }
   public String getStudentAddress(){
        return Address;     
        }
    public void setStudentAddress(String address){
        this.Address=address;
        }
    public String getSchoolAddress(){
        return Address;
        }
    public void setSchoolAddress(String address){
        this.Address=address;
        }
    public String getStudentAge(){
        return Age;
        }
    public void setStudentAge(String age){
        this.Age=age;
        }
    
    public String toString1(){        
        return  "Student's Name: " + getStudentName() + "n" +
                        "Student's Address: " + getStudentAddress() + "n" +
                        "Student's Age: " + getStudentAge() + "nn" +
        
                        "School's Name: " + getSchoolName() + "n" +
                        "School's Address: " + getSchoolAddress();
    } 
}
 
Parsed in 0.015 seconds,  using GeSHi 1.0.8.4

And this is output:
Student's Name: null
Student's Address: null
Student's Age:null

School's Name: null
School's Address:null

Thanks,

--Alex.

padde · by **padde** » Fri Apr 10, 2009 11:53 am

This sample code parse...

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Using java Syntax Highlighting

package de.XMLparser;
 
import java.io.IOException;
import java.io.InputStream;
import java.util.Vector;
 
import javax.xml.parsers.ParserConfigurationException;
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.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
 
class ParsedExampleDataSet {
    private String schoolname;
    private String studentname;
    private String studentage;
    private String studentaddress;
    private String schooladdress;
 
    public String toString() {
        return "Student's Name: " + studentname + "n" + "Student's Address: "
                + studentaddress + "n" + "Student's Age: " + studentage
                + "nn" + "School's Name: " + schoolname + "n"
                + "School's Address: " + schooladdress;
    } 
    
    public String getSchoolName() { return schoolname; }
    public void setSchoolName(String schoolname) { this.schoolname = schoolname; }
    public String getStudentName() { return studentname; }
    public void setStudentName(String studentname) { this.studentname = studentname; }
    public String getStudentAge() { return studentage; }
    public void setStudentAge(String studentage) { this.studentage = studentage; }
    public String getStudentAddress() { return studentaddress; }
    public String getSchoolAddress() { return schooladdress; }
    public void setStudentAddress(String studentaddress) { 
        this.studentaddress = studentaddress; 
    }
    public void setSchoolAddress(String schooladress) { 
        this.schooladdress = schooladress; 
    }
}
 
class ContentHandler extends DefaultHandler {
    private enum Tags {
        Test, Name, Age, School, Student, Address, Entry
    }
    
    private boolean in_schoolTag = false; 
    private boolean in_studentTag = false; 
    
    private ParsedExampleDataSet DataSet;
    private Vector<ParsedExampleDataSet> MyParsedExampleDataSets;
    
    
    public ContentHandler() {
        super();
        this.MyParsedExampleDataSets = new Vector<ParsedExampleDataSet>();
    }
 
    public Vector<ParsedExampleDataSet> getParsedExampleDataSets() { 
        return this.MyParsedExampleDataSets; 
    }
    
    public void startDocument() throws SAXException { } 
    public void endDocument() throws SAXException { } 
 
    public void startElement(String n, String l, String q, Attributes a) {
         switch(Tags.valueOf(l)) {
             case School:
                 in_schoolTag = true;
                 break;
             case Student:
                 in_studentTag = true;
                 break;
             case Address:
                 if(in_studentTag) 
                     DataSet.setStudentAddress(a.getValue("displayname"));
                 if(in_schoolTag) 
                     DataSet.setSchoolAddress(a.getValue("displayname"));
                 break;
             case Age:
                 DataSet.setStudentAge(a.getValue("value"));
                 break;
             case Name:
                 if(in_studentTag) 
                     DataSet.setStudentName(a.getValue("displayname"));
                 if(in_schoolTag) 
                     DataSet.setSchoolName(a.getValue("displayname"));
                 break;
             case Entry:
                 DataSet = new ParsedExampleDataSet();
                 break;
         }
    } 
      
    public void endElement(String n, String l, String q) {
        switch(Tags.valueOf(l)) {
            case School:
                in_schoolTag = false;
                break;
            case Student:
                in_studentTag = false;
                break;
            case Entry:
                MyParsedExampleDataSets.add(DataSet);
                break;
        }
    }
     
    public void characters(char ch[], int start, int length) { } 
}
 
public class XMLparserSample extends Activity {
    private TextView myTextView;
    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.main);
        
        Vector<ParsedExampleDataSet> test = read(getResources().openRawResource(R.raw.sample));
        
        String text = "";
        for(int i=0; i < test.size(); i++)
            text += test.get(i).toString()+"n-------------------------n";
        
        myTextView = (TextView) findViewById(R.id.textview);        
        myTextView.setText(text);
    }
    
    public Vector<ParsedExampleDataSet> read(InputStream in) {
        SAXParserFactory spf = SAXParserFactory.newInstance(); 
        SAXParser sp;
        try {
            sp = spf.newSAXParser();
            XMLReader xr = sp.getXMLReader(); 
            ContentHandler ch = new ContentHandler(); 
            xr.setContentHandler(ch); 
            xr.parse(new InputSource(in)); 
            return ch.getParsedExampleDataSets();                
        } catch (ParserConfigurationException e) {
        } catch (SAXException e) {
        } catch (IOException e) {}
        return null;
    }    
}
 
Parsed in 0.021 seconds,  using GeSHi 1.0.8.4

...this sample.xml in the res/raw folder...

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

<?xml version="1.0"?> 
<Test>
    <Entry>
        <Student>
            <Name displayname = "Jane"/>
            <Address displayname = "ABC"/>
            <Age value = "20"/>
        </Student>
        <School>
            <Name displayname = "NTUST"/>
            <Address displayname = "123"/>
        </School>
    </Entry>
    <Entry>
        <Student>
            <Name displayname = "Jane2"/>
            <Address displayname = "ABCD"/>
            <Age value = "21"/>
        </Student>
        <School>
            <Name displayname = "NTUST2"/>
            <Address displayname = "1234"/>
        </School>
    </Entry>
</Test> 
 
Parsed in 0.002 seconds,  using GeSHi 1.0.8.4

... and shows the results in the TextView of this main.xml in res/layout

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
>
<TextView  
    android:id="@+id/textview"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
/>
</LinearLayout>
 
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

Greets
Padde

songotho · by **songotho** » Sun Apr 12, 2009 9:11 am

I'm very thank you about this tutorial, thank padde about xml. Maybe would I contact you to ask sth about xml again?

Thanks,

--Alex

padde · by **padde** » Sun Apr 12, 2009 1:15 pm

Sure.. no problem

songotho · by **songotho** » Tue Apr 14, 2009 8:41 am

Hi pedde,

I have tried with xml:

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

<?xml version="1.0"?>
<Test>
  <Tag1>
    <Student>
        <Name displayname = "Jane"></Name>
        <Address displayname = "ABC"></Address>
        <Age value = "20"></Age>
    </Student>
    <School>
        <Name displayname = "NTUST"></Name>
        <Address displayname = "123"></Address>
    </School>
  </Tag1>
  <Tag2>
     ..........................
  </Tag2>
</Test>
 
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

So this function can't get data Enum<Enum<T>>.
When I get data with the xml above, my output is null.
How can I do with multiple tags? Would you tell me about it?

Thanks,

--Alex.

padde · by **padde** » Tue Apr 14, 2009 10:10 am

I edited my above example to cover your new needs.

Greets
Padde

songotho · by **songotho** » Tue Apr 14, 2009 3:09 pm

Hi pedde,

Thanks about your edited codes so if you use difference tags: Entry1, Entry 2, .... and get data in only Entry1, the function always get data in last Entry.

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

 
<?xml version="1.0"?>
 
<Test>
 
    <Entry1>
 
        <Student>
 
            <Name displayname = "Jane"/>
 
            <Address displayname = "ABC"/>
 
            <Age value = "20"/>
 
        </Student>
 
        <School>
 
            <Name displayname = "NTUST"/>
 
            <Address displayname = "123"/>
 
        </School>
 
    </Entry1>
 
    <Entry2>
 
        <Student>
 
            <Name displayname = "Jane2"/>
 
            <Address displayname = "ABCD"/>
 
            <Age value = "21"/>
 
        </Student>
 
        <School>
 
            <Name displayname = "NTUST2"/>
 
            <Address displayname = "1234"/>
 
        </School>
 
    </Entry2>
 
</Test> 
 
Parsed in 0.002 seconds,  using GeSHi 1.0.8.4

Thanks,
--Alex

padde · by **padde** » Tue Apr 14, 2009 4:32 pm

The tag is named "Entry" not Entry plus a number.
Why you want to number those tags?

Greets
PAdde <- notice the capital A

Parsing XML from the Net - Using the SAXParser

Same problem like dariusz

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