XML Parsing in Android

                       XML Parsing in Android

Xml stands for extensible markup language.There are  types of parsing methods in android

1 SaxPullparser

2 DOM parser

Here we are using SaxPullparser ,because it is more efficient that any other parser in android.

Following is a example for XML parsing using  SaxPullparser 

CustomXML.java

package fortyonepost.com.cx;

import java.io.IOException;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import teste.com.teste.R;

import android.app.Activity;

import android.content.res.Resources;

import android.content.res.XmlResourceParser;

import android.os.Bundle;

import android.util.Log;

import android.widget.Toast;

public class CustomXML extends Activity 

{

//this object will store a reference to the Activity's resources

private Resources resources;

//this integer will store the XMLResourceParser events

private int event;

//a boolean that will tell if it's the tag we are looking for

private boolean isCorrectTag = false;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) 

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        //get the application's resources

        resources = this.getResources();

        

        try 

        {

         GetAttributes("tutorial");

         GetAttributes("level1");

} 

        catch (XmlPullParserException e) 

{

         //Display a toast message.

Toast.makeText(this, "Could not retrieve the current parser event", Toast.LENGTH_SHORT);

} 

        catch (IOException e) 

{

         //Display a toast message.

Toast.makeText(this, "Could not read XML file", Toast.LENGTH_SHORT);

}

    }

    

    public void GetAttributes(String tagName) throws XmlPullParserException, IOException

{

     //get a XmlResourceParser object to read contents of the 'custom.xml' file

XmlResourceParser parser = resources.getXml(R.xml.custom);

//get the initial parser event

event = parser.getEventType();

//while haven't reached the end of the XML file 

    while (event != XmlPullParser.END_DOCUMENT) 

    {

     //get the type of the event

     event = parser.getEventType();

    

     //if parser finds a new tag and its name equals 'tagName'

            if (event == XmlPullParser.START_TAG && parser.getName().contentEquals(tagName)) 

            {

             //print the attribute values at LogCat

             //print the ID

             Log.i("CustomXML", "id:" + parser.getIdAttribute());

            

             //print the difficulty

             float difficulty = parser.getAttributeFloatValue(null, "difficulty", 0.0f);

             Log.i("CustomXML", "difficulty:" + Float.toString(difficulty));

            

             //print the number of enemies

             int enemies = parser.getAttributeIntValue(null, "enemies", 0);

             Log.i("CustomXML", "enemies:" + Integer.toString(enemies));

             //Found the tag, set the boolean to true

             isCorrectTag = true;

            } 

            else if (event == XmlPullParser.TEXT && isCorrectTag)

            {

             //Print the tag's content

             Log.i("CustomXML", parser.getText());

             //set isCorrectTag to false;

             isCorrectTag = false;

             //break the loop, we already found what we were looking for

             break;

            }

            //go to the next tag

            parser.next();

    }

    //Release resources associated with the parser

    parser.close();

}

}

place a xml file in res-xm1-custom.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

<tutorial id="level" difficulty="1.5" enemies="3">The tutorial.</tutorial>

<level1 id="level" difficulty="2.6" enemies="10">The first level.</level1>

</resources>

check the logcat in your emulator for output  

 

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