Java Development

[satish4ru]

package com.logictreeit.partytemprature;

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

import javax.microedition.location.Location;
import javax.microedition.location.LocationException;
import javax.microedition.location.LocationListener;
import javax.microedition.location.LocationProvider;
import javax.microedition.location.QualifiedCoordinates;

import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;

public class CurLocationPicker {

	private static String longitude;
	private static String latitude;
	private HomeScreen homeScreen;
	private LocationProvider locationProvider;
	private Timer timer;

	public CurLocationPicker(HomeScreen homeScreen) {
		this.homeScreen = homeScreen;
		
	}

	private LocationListener locationListener = new LocationListener() {

		public void providerStateChanged(LocationProvider provider, int newState) {
		}

		public void locationUpdated(LocationProvider provider, Location location) {
			// final Location myLoc = location;
			if(timer!=null ){
			timer.cancel();
			}
			homeScreen.popGpsFetchScreen();
			QualifiedCoordinates coordinates = location
					.getQualifiedCoordinates();
			
			if(coordinates != null){
				latitude = String.valueOf(coordinates.getLatitude());
				longitude = String.valueOf(coordinates.getLongitude());
				
				System.out.println("Latiude GPS- " + latitude);
				System.out.println("Longitude GPS- " + longitude);
				Dialog.alert("Latiude GPS- " + latitude+"Longitude GPS- " + longitude);
			}else{
				location = LocationProvider.getLastKnownLocation();
				coordinates = location.getQualifiedCoordinates();
				
				if(coordinates != null){
				latitude = String.valueOf(coordinates.getLatitude());
				longitude = String.valueOf(coordinates.getLongitude());
				System.out.println("Latiude GPS-Last Known location " + latitude);
				System.out.println("Longitude GPS-Last Known location " + longitude);
				}else{
					Runnable showGpsUnsupportedDialog = new Runnable() {
						public void run() {
							Dialog.alert("Unable to fetch GPS location, exiting...");
							System.exit(1);
						}
					};
					UiApplication.getUiApplication().invokeLater(
							showGpsUnsupportedDialog);
				}
			}

			
		}
	};

	public boolean startLocationUpdate() {
		timer = new Timer();
		timer.schedule(new gpsTask(), 15000);
	
		boolean retval = false;
		try {

			locationProvider = LocationProvider.getInstance(null);

			if (locationProvider == null) {
				// We would like to display a dialog box indicating that GPS
				// isn't supported,
				// but because the event-dispatcher thread hasn't been started
				// yet, modal
				// screens cannot be pushed onto the display stack. So delay
				// this operation
				// until the event-dispatcher thread is running by asking it to
				// invoke the
				// following Runnable object as soon as it can.

				Runnable showGpsUnsupportedDialog = new Runnable() {
					public void run() {
						Dialog.alert("GPS is not supported on this platform, exiting...");
						System.exit(1);
					}
				};

				UiApplication.getUiApplication().invokeLater(
						showGpsUnsupportedDialog); // Ask event-dispatcher
				// thread to display dialog
				// ASAP.
			} else {
				
				// Only a single listener can be associated with a provider, and
				// unsetting it
				// involves the same call but with null, therefore, no need to
				// cache the listener
				// instance request an update every second.
				locationProvider.setLocationListener(locationListener, 1, 1, 1);
				
				retval = true;
			}
		} catch (LocationException le) {
			System.err.println("Failed to instantiate the LocationProvider object, exiting...");
			System.err.println(le);
			System.exit(0);
		}
		
		return retval;
	}

	private class gpsTask extends TimerTask {

		public void run() {

			QualifiedCoordinates coordinates = LocationProvider
					.getLastKnownLocation().getQualifiedCoordinates();

			latitude = String.valueOf(coordinates.getLatitude());
			longitude = String.valueOf(coordinates.getLongitude());
			homeScreen.popGpsFetchScreen();
			System.out.println("LastKnownLatiude - " + latitude);
			System.out.println("LastKnownLongitude - " + longitude);

		}
	}

	public static String getLatitude() {
		return latitude;
	}

	public static String getLongitude() {
		return longitude;
	}

	public void stopUpdates() {
		if (locationProvider != null) {
			locationProvider.reset();
			locationProvider.setLocationListener(null, -1, -1, -1);
		}
	}
}

hiiiiiii in the above program 

timer is not working i kept the timer if gps location is not fetched with in that time but here it is not executing the sheduled thread ..... 

timer = new Timer();
		timer.schedule(new gpsTask(), 15000);