Friday, March 29, 2013

XmlPullParsers sample Code

Book.java


package com.eaxmple.xmlpullparser.classess;

public class Book {
public String bookId;
public String author;
public String title;
public String genre;
public String publish_date;
public String desc;
public double price;
}


BookParser.java


package com.eaxmple.xmlpullparser.parsers;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;

import android.content.Context;
import android.util.Log;

import com.eaxmple.xmlpullparser.classess.Book;

public class BookParser {
List<Book> mBooksList;
String mXmlFilePath;
Context mContext;
XmlPullParser xpp;
Book tempBook;

public BookParser(Context context,String filePath){
mBooksList=new ArrayList<Book>();
mContext=context;
mXmlFilePath=filePath;
}

public List<Book> parse() throws Exception{
InputStream istr = mContext.getAssets().open(mXmlFilePath);
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
xpp = factory.newPullParser();
xpp.setInput(istr, "UTF-8");
int eventType = xpp.getEventType();

        while (eventType != XmlPullParser.END_DOCUMENT)
        {
          if(eventType == XmlPullParser.START_TAG)
        {
         
           String startTag=xpp.getName();
        if(startTag.equals("book"))
        {
        tempBook=new Book();
        Map<String,String> attributes = getAttributes(xpp);
        tempBook.bookId=attributes.get("id");
        }
        else if(startTag.equals("author"))
        {
        tempBook.author=xpp.nextText();
        }
        else if(startTag.equals("title"))
        {
        tempBook.title=xpp.nextText();
        }
        else if(startTag.equals("genre"))
        {
        tempBook.genre=xpp.nextText();
        }
        else if(startTag.equals("price"))
        {
        tempBook.price=Double.parseDouble(xpp.nextText());
        }
        else if(startTag.equals("publish_date"))
        {
        tempBook.publish_date=xpp.nextText();
        }
        else if(startTag.equals("description"))
        {
        tempBook.desc=xpp.nextText();
        }
        }
        else if(eventType == XmlPullParser.END_TAG)
        {
        String endTag=xpp.getName();
        System.out.println("End Tag "+endTag);
        if(endTag.equals("book"))
        {
        mBooksList.add(tempBook);
        }
        }
        eventType = xpp.next();
        }
       return mBooksList;
}

private Map<String,String>  getAttributes(XmlPullParser parser) throws Exception {
   Map<String,String> attrs=null;
   int acount=parser.getAttributeCount();
   if(acount != -1) {
       attrs = new HashMap<String,String>(acount);
       for(int x=0;x<acount;x++) {
           attrs.put(parser.getAttributeName(x), parser.getAttributeValue(x));
       }
   }
   else {
       throw new Exception("Required entity attributes missing");
   }
   return attrs;
}

}

MainActivity.java

package com.example.xmlpullparser;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.eaxmple.xmlpullparser.classess.Book;
import com.eaxmple.xmlpullparser.parsers.BookParser;

public class MainActivity extends Activity {
ArrayList<Book> books;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BookParser bookParser=new BookParser(this,"xml/books.xml");
try {
books=(ArrayList<Book>) bookParser.parse();
System.out.println(books.size());
Toast.makeText(getApplicationContext(), "count is"+books.size(), Toast.LENGTH_LONG).show();
for(int i=0;i<books.size()-1;i++)
{
Log.e("xmlPullparser","book id="+books.get(i).bookId+" book name="+books.get(i).title);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

Assest/xml/books.xml

<?xml version="1.0"?>
<catalog>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications 
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies, 
      an evil sorceress, and her own childhood to become queen 
      of the world.</description>
   </book>
   <book id="bk103">
      <author>Corets, Eva</author>
      <title>Maeve Ascendant</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-11-17</publish_date>
      <description>After the collapse of a nanotechnology 
      society in England, the young survivors lay the 
      foundation for a new society.</description>
   </book>
   <book id="bk104">
      <author>Corets, Eva</author>
      <title>Oberon's Legacy</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-03-10</publish_date>
      <description>In post-apocalypse England, the mysterious 
      agent known only as Oberon helps to create a new life 
      for the inhabitants of London. Sequel to Maeve 
      Ascendant.</description>
   </book>
   <book id="bk105">
      <author>Corets, Eva</author>
      <title>The Sundered Grail</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-09-10</publish_date>
      <description>The two daughters of Maeve, half-sisters, 
      battle one another for control of England. Sequel to 
      Oberon's Legacy.</description>
   </book>
   <book id="bk106">
      <author>Randall, Cynthia</author>
      <title>Lover Birds</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-09-02</publish_date>
      <description>When Carla meets Paul at an ornithology 
      conference, tempers fly as feathers get ruffled.</description>
   </book>
   <book id="bk107">
      <author>Thurman, Paula</author>
      <title>Splish Splash</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>A deep sea diver finds true love twenty 
      thousand leagues beneath the sea.</description>
   </book>
   <book id="bk108">
      <author>Knorr, Stefan</author>
      <title>Creepy Crawlies</title>
      <genre>Horror</genre>
      <price>4.95</price>
      <publish_date>2000-12-06</publish_date>
      <description>An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.</description>
   </book>
   <book id="bk109">
      <author>Kress, Peter</author>
      <title>Paradox Lost</title>
      <genre>Science Fiction</genre>
      <price>6.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>After an inadvertant trip through a Heisenberg
      Uncertainty Device, James Salway discovers the problems 
      of being quantum.</description>
   </book>
   <book id="bk110">
      <author>O'Brien, Tim</author>
      <title>Microsoft .NET: The Programming Bible</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-09</publish_date>
      <description>Microsoft's .NET initiative is explored in 
      detail in this deep programmer's reference.</description>
   </book>
   <book id="bk111">
      <author>O'Brien, Tim</author>
      <title>MSXML3: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-01</publish_date>
      <description>The Microsoft MSXML3 parser is covered in 
      detail, with attention to XML DOM interfaces, XSLT processing, 
      SAX and more.</description>
   </book>
   <book id="bk112">
      <author>Galos, Mike</author>
      <title>Visual Studio 7: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>49.95</price>
      <publish_date>2001-04-16</publish_date>
      <description>Microsoft Visual Studio 7 is explored in depth,
      looking at how Visual Basic, Visual C++, C#, and ASP+ are 
      integrated into a comprehensive development 
      environment.</description>
   </book>
</catalog>