GPS.java

package com.main.pirateisland;

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
//import android.content.Context; //isos to diagrapso
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings; //maybe?
import android.widget.Toast;

public class GPS extends Service implements LocationListener {

	private final Context context;
	
	boolean isGPSEnabled = false;
	boolean isNetworkEnabled = false;
	boolean canGetLocation = false;
	
	Location location;   
	
	double latitude;
	double longitude;
	
	private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
	private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;
	
	protected LocationManager locationManager;
	
	public GPS(Context context){
		
		
		this.context = context;
	    getLocation();   
	}
	
	public Location getLocation() {
		try{
			locationManager = (LocationManager) context.getSystemService(LOCATION_SERVICE);
			
			isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
			
			isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
			
			if(!isGPSEnabled && !isNetworkEnabled) {
				
				Toast toast = Toast.makeText(getApplicationContext(), R.string.giveanswer, Toast.LENGTH_SHORT);
    			toast.show(); // auto edo
				
			}else {
				this.canGetLocation = true;
				//pairnoume ton location apo ton provider -wifi
				
				if(isNetworkEnabled){
					locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
					
				//}
				if(locationManager != null){
					location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
					
					if(location != null){
					    latitude = location.getLatitude();
					    longitude = location.getLongitude();
					}
				}
			}
				//an to GPS einai energopoiimeno, pernoume apo ekei
				if (isGPSEnabled){
					if(location == null){
						locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
			
					if(locationManager != null){
						location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
						
						if (location !=null) {
							latitude = location.getLatitude();
							longitude = location.getLongitude();
						}
					}
					}
				}
		}
			
		}catch (Exception e){
			e.printStackTrace();
			
		}
		return location;
		
	}
	
	public void stopUsingGPS(){
		if(locationManager != null){
			locationManager.removeUpdates(GPS.this);
		}
	}
	
	public double getLatitude(){
		if (location != null) {
			latitude = location.getLatitude();
		}
		return latitude;
	}
	
	public double getLongitude(){
		if (location != null) {
			longitude = location.getLongitude();
		}
		return longitude;
	}
	
	 public boolean canGetLocation() {
	        return this.canGetLocation;
	    }
	
	
	
	 public void showSettingsAlert(){
	        AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
	      
	        // Setting Dialog Title
	        alertDialog.setTitle("GPS is settings");
	  
	        // Setting Dialog Message
	        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
	  
	        // Setting Icon to Dialog
	        //alertDialog.setIcon(R.drawable.delete);
	  
	        // On pressing Settings button
	        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
	            public void onClick(DialogInterface dialog,int which) {
	                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
	                context.startActivity(intent);
	            }
	        });
	  
	        // on pressing cancel button
	        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
	            public void onClick(DialogInterface dialog, int which) {
	            dialog.cancel();
	            }
	        });
	  
	        // Showing Alert Message
	        alertDialog.show();
	    }
	
	
	@Override
	public void onLocationChanged(Location location) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

}