Snippet code for parsing KML file from Google Maps

KML Snippet

 /**
     * Retrieve navigation data set from either remote URL or String
     * @param url
     * @return navigation set
     */
    public static NavigationDataSet GetNavigationDataSet(String url) {

        NavigationDataSet navigationDataSet = null;
        try
            { 
        	if(LOG_LEVEL <= Log.DEBUG)Log.d(TAG, "url[" + url + "]");
            final URL aUrl = new URL(url); 
            if(LOG_LEVEL <= Log.DEBUG)Log.d(TAG, "Connecting...");
            final URLConnection conn = aUrl.openConnection();
//            conn.setReadTimeout(15 * 1000);  // timeout for reading the google maps data: 15 secs
            conn.connect();
            
            if(LOG_LEVEL <= Log.DEBUG)Log.d(TAG, "Connected...");
            /* Get a SAXParser from the SAXPArserFactory. */
            SAXParserFactory spf = SAXParserFactory.newInstance(); 
            SAXParser sp = spf.newSAXParser(); 

            /* Get the XMLReader of the SAXParser we created. */
            XMLReader xr = sp.getXMLReader();

            /* Create a new ContentHandler and apply it to the XML-Reader*/ 
            NavigationSaxHandler navSax2Handler = new NavigationSaxHandler(); 
            xr.setContentHandler(navSax2Handler); 
            
            if(LOG_LEVEL <= Log.DEBUG)Log.d(TAG, "Parse Stream");
            /* Parse the xml-data from our URL. */ 
            xr.parse(new InputSource(aUrl.openStream()));
            
            if(LOG_LEVEL <= Log.DEBUG)Log.d(TAG, "Get data frm Parser");
            /* Our NavigationSaxHandler now provides the parsed data to us. */ 
            navigationDataSet = navSax2Handler.getParsedData(); 

        } catch (Exception e) {
        	if(LOG_LEVEL <= Log.ERROR)Log.e(TAG, "error getting route info", e);
            navigationDataSet = null;
        }   

        return navigationDataSet;
    }

NavigationDataSet.java

/*
 * Copyright (c)2012 Poohdish Rattanavijai
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.robgthai.lib.vo;

import java.util.ArrayList;
import java.util.Iterator;

/**
 * Class representing Navigation path used in Google Maps
 * @author poohdishr
 *
 */
public class NavigationDataSet { 

	private ArrayList<Placemark> placemarks = new ArrayList<Placemark>();
	private Placemark currentPlacemark;
	private Placemark routePlacemark;

	public String toString() {
		String s= "";
		for (Iterator<Placemark> iter=placemarks.iterator();iter.hasNext();) {
			Placemark p = (Placemark)iter.next();
			s += p.getTitle() + "\n" + p.getDescription() + "\n\n";
		}
		return s;
	}

	public void addCurrentPlacemark() {
		placemarks.add(currentPlacemark);
	}

	public ArrayList<Placemark> getPlacemarks() {
		return placemarks;
	}

	public void setPlacemarks(ArrayList<Placemark> placemarks) {
		this.placemarks = placemarks;
	}

	public Placemark getCurrentPlacemark() {
		return currentPlacemark;
	}

	public void setCurrentPlacemark(Placemark currentPlacemark) {
		this.currentPlacemark = currentPlacemark;
	}

	public Placemark getRoutePlacemark() {
		return routePlacemark;
	}

	public void setRoutePlacemark(Placemark routePlacemark) {
		this.routePlacemark = routePlacemark;
	}

}

NavigationSaxHandler.java

/*
 * Copyright (c)2012 Poohdish Rattanavijai
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.robgthai.lib.util;

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

import com.robgthai.lib.vo.NavigationDataSet;
import com.robgthai.lib.vo.Placemark;


@SuppressWarnings("unused")
public class NavigationSaxHandler extends DefaultHandler{ 
//	private static final String TAG = NavigationSaxHandler.class.getSimpleName();

	// =========================================================== 
	// Fields 
	// =========================================================== 

	private boolean in_kmltag = false; 
	private boolean in_placemarktag = false; 
	private boolean in_nametag = false;
	private boolean in_descriptiontag = false;
	private boolean in_geometrycollectiontag = false;
	private boolean in_linestringtag = false;
	private boolean in_pointtag = false;
	private boolean in_coordinatestag = false;

	private StringBuffer buffer;

	private NavigationDataSet navigationDataSet = new NavigationDataSet(); 

	// =========================================================== 
	// Getter & Setter 
	// =========================================================== 

	public NavigationDataSet getParsedData() {
		navigationDataSet.getCurrentPlacemark().setCoordinates(buffer.toString().trim());
		return this.navigationDataSet; 
	} 

	// =========================================================== 
	// Methods 
	// =========================================================== 
	@Override 
	public void startDocument() throws SAXException { 
		this.navigationDataSet = new NavigationDataSet(); 
	} 

	@Override 
	public void endDocument() throws SAXException { 
		// Nothing to do
	} 

	/** Gets be called on opening tags like: 
	 * <tag> 
	 * Can provide attribute(s), when xml was like: 
	 * <tag attribute="attributeValue">*/ 
	@Override 
	public void startElement(String namespaceURI, String localName, 
			String qName, Attributes atts) throws SAXException { 
		if (localName.equals("kml")) { 
			this.in_kmltag = true;
		} else if (localName.equals("Placemark")) { 
			this.in_placemarktag = true; 
//			Log.d(TAG, "startElement localName[" + localName + "] qName[" + qName + "]");
			navigationDataSet.setCurrentPlacemark(new Placemark());
		} else if (localName.equals("name")) { 
			this.in_nametag = true;
		} else if (localName.equals("description")) { 
			this.in_descriptiontag = true;
		} else if (localName.equals("GeometryCollection")) { 
			this.in_geometrycollectiontag = true;
		} else if (localName.equals("LineString")) { 
			this.in_linestringtag = true;              
		} else if (localName.equals("point")) { 
			this.in_pointtag = true;          
		} else if (localName.equals("coordinates")) {
			buffer = new StringBuffer();
			this.in_coordinatestag = true;                        
		}
	} 

	/** Gets be called on closing tags like: 
	 * </tag> */ 
	@Override 
	public void endElement(String namespaceURI, String localName, String qName) 
			throws SAXException { 
		if (localName.equals("kml")) {
			this.in_kmltag = false; 
		} else if (localName.equals("Placemark")) { 
			this.in_placemarktag = false;

//			Log.d(TAG, "endElement localName[" + localName + "] qName[" + qName + "] Route[" + navigationDataSet.getCurrentPlacemark().getTitle() + "]");
			if ("Route".equals(navigationDataSet.getCurrentPlacemark().getTitle())) 
				navigationDataSet.setRoutePlacemark(navigationDataSet.getCurrentPlacemark());
			else navigationDataSet.addCurrentPlacemark();

		} else if (localName.equals("name")) { 
			this.in_nametag = false;           
		} else if (localName.equals("description")) { 
			this.in_descriptiontag = false;
		} else if (localName.equals("GeometryCollection")) { 
			this.in_geometrycollectiontag = false;
		} else if (localName.equals("LineString")) { 
			this.in_linestringtag = false;              
		} else if (localName.equals("point")) { 
			this.in_pointtag = false;          
		} else if (localName.equals("coordinates")) { 
			this.in_coordinatestag = false;
		}
	} 

	/** Gets be called on the following structure: 
	 * <tag>characters</tag> */ 
	@Override 
	public void characters(char ch[], int start, int length) { 
		if(this.in_nametag){ 
			if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
			navigationDataSet.getCurrentPlacemark().setTitle(new String(ch, start, length));            
		} else if(this.in_descriptiontag){ 
			if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
			navigationDataSet.getCurrentPlacemark().setDescription(new String(ch, start, length));          
		} else if(this.in_coordinatestag){        
			if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
//			navigationDataSet.getCurrentPlacemark().setCoordinates(new String(ch, start, length));
			buffer.append(ch, start, length);
		}
	} 
}

Placemark.java

/*
 * Copyright (c)2012 Poohdish Rattanavijai
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.robgthai.lib.vo;

/**
 * Class representing placemark used in Google Maps
 * @author poohdishr
 *
 */
public class Placemark {

	String title;
	String description;
	String coordinates;
	String address;

	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getDescription() {
		return description;
	}
	public void setDescription(String description) {
		this.description = description;
	}
	public String getCoordinates() {
		return coordinates;
	}
	public void setCoordinates(String coordinates) {
		this.coordinates = coordinates;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
}