LoadingScreen.java

import java.util.Timer;
import java.util.TimerTask;

import javax.microedition.location.AddressInfo;
import javax.microedition.location.Coordinates;
import javax.microedition.location.LocationProvider;

import net.rim.device.api.gps.BlackBerryCriteria;
import net.rim.device.api.gps.BlackBerryLocation;
import net.rim.device.api.gps.BlackBerryLocationProvider;
import net.rim.device.api.gps.GPSInfo;
import net.rim.device.api.system.Application;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
import net.rim.device.api.ui.decor.BackgroundFactory;

public class LoadingScreen extends MainScreen
{
	Timer timer;
	TimerTask timerTask;
	static AddressInfo as;
	VerticalFieldManager vertical;
	HorizontalFieldManager hor;
	static double longitude,latitude;
	ButtonField submit;
	LabelField distance;
	int index=0,i=0;
	static double lat=0,lng=0;
	boolean flag=false;

	public LoadingScreen()
	{
		index=1;
		String str="gandhinagar,Gujarth";
		createGUI(str);
	}

	private void createGUI(String str)
	{
		vertical = (VerticalFieldManager) getMainManager();
		vertical.setBackground(BackgroundFactory.createSolidBackground(Color.GREEN));
		distance=new LabelField("kfldfladflkadfadfsadfk");
		distance.setPadding(20, 0, 0, 5);
		vertical.add(distance);

		try
		{
			BlackBerryCriteria myCriteria = new BlackBerryCriteria(GPSInfo.GPS_MODE_AUTONOMOUS);
			if (GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_ASSIST))
				  myCriteria.setMode(GPSInfo.GPS_MODE_ASSIST);
			else if (GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_AUTONOMOUS))
				  myCriteria.setMode(GPSInfo.GPS_MODE_AUTONOMOUS);
			BlackBerryLocationProvider myProvider;
			try
			{
				myProvider  = (BlackBerryLocationProvider) LocationProvider.getInstance(myCriteria);
				BlackBerryLocation myLocation;
				myLocation = (BlackBerryLocation) myProvider.getLocation(300);
				latitude = myLocation.getQualifiedCoordinates().getLatitude();
				longitude = myLocation.getQualifiedCoordinates().getLongitude();
				System.out.println(latitude+"==================================="+longitude+"==============");
				flag=true;
				getDistance(latitude,longitude);
			}
			catch(Exception e)
			{
				System.out.println("Exception: ==========="+e.getMessage());
				e.printStackTrace();
			}
		}
		catch(Exception e)
		{
			System.out.println("Exception: ==========="+e.getMessage());
			e.printStackTrace();
		}
	}

	public void getDistance(final double latitude,final double longitude)
	{
		timer=new Timer();
		timerTask=new TimerTask()
		{
			public void run()
			{
				if(flag)
				{
					i++;
					BlackBerryCriteria myCriteria = new BlackBerryCriteria(GPSInfo.GPS_MODE_AUTONOMOUS);
					if (GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_ASSIST))
						  myCriteria.setMode(GPSInfo.GPS_MODE_ASSIST);
					else if (GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_AUTONOMOUS))
						  myCriteria.setMode(GPSInfo.GPS_MODE_AUTONOMOUS);
					BlackBerryLocationProvider myProvider;
					try
					{
						myProvider  = (BlackBerryLocationProvider) LocationProvider.getInstance(myCriteria);
						BlackBerryLocation myLocation;
						myLocation = (BlackBerryLocation) myProvider.getLocation(300);
						lat = myLocation.getQualifiedCoordinates().getLatitude();
						lng = myLocation.getQualifiedCoordinates().getLongitude();
						Coordinates coor1=new Coordinates(latitude, longitude, Float.NaN);
						Coordinates coor2=new Coordinates(lat, lng, Float.NaN);
						float dist=0;
						dist=(float)coor1.distance(coor2)/1000;
						System.out.println(longitude+":"+latitude+":=====================la: "+lat+"lo: "+lng+" Distance: "+dist);
						distance.setText(""+dist);
					}
					catch(Exception e)
					{
						System.out.println("Exception: ==========="+e.getMessage());
						e.printStackTrace();
					}
				}
			}
		};
		timer.scheduleAtFixedRate(timerTask, 0, 2000);
	}
}