MyLocation.java

package com.example.android;

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

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

public class MyLocation {
    Timer timer1;
    LocationManager lm;
    LocationResult locationResult;
    boolean gps_enabled = false;
    boolean network_enabled = false;

    public boolean getLocation(Context context, LocationResult result) {

        locationResult = result;
        if (lm == null) {
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        }

        try {
            gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch (Exception e) {}

        try {
            network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        } catch (Exception e) {}

        if (!gps_enabled && !network_enabled) {
            return false;
        }

        if (gps_enabled) {
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
        }

        if (network_enabled) {
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
        }

        timer1 = new Timer();
        timer1.schedule(new GetLastLocation(), 10000);
        return true;
    }


    LocationListener locationListenerGps = new LocationListener() {

        public void onStatusChanged(Location location) {
            timer1.cancel();

            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerNetwork);
        }
        public void onProviderEnabled(String provider) {}
        public void onProviderDisabled(String provider) {}
        public void onLocationChanged(Location location) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };


    LocationListener locationListenerNetwork = new LocationListener() {

        public void onStatusChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerGps);
        }
        public void onProviderEnabled(String provider) {}
        public void onProviderDisabled(String provider) {}
        public void onLocationChanged(Location location) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    class GetLastLocation extends TimerTask {
        @Override
        public void run() {
            lm.removeUpdates(locationListenerGps);
            lm.removeUpdates(locationListenerNetwork);

            Location netLoc = null;
            Location gpsLoc = null;

            if (gps_enabled){
                gpsLoc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            }
            if (network_enabled) {
                netLoc = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            }

            if ((gpsLoc != null) && (netLoc != null)) {
                if (gpsLoc.getTime() > netLoc.getTime()) {
                    locationResult.gotLocation(gpsLoc);
                } else {
                    locationResult.gotLocation(netLoc);
                }
                return;
            }

            if (gpsLoc != null) {
                locationResult.gotLocation(gpsLoc);
                return;
            }

            if (netLoc != null) {
                locationResult.gotLocation(netLoc);
                return;
            }

            locationResult.gotLocation(null);

        }
    }

    public static abstract class LocationResult {
        public abstract void gotLocation(Location location);
    }
}