Android Open Source - Go2-Rennes Location Utils

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2011 Michel DAVID mimah35-at-gmail.com
 * /*  w  w  w . java2 s  .c  om*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package fr.gotorennes.util;

import java.util.List;
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;
import android.util.Log;

public class LocationUtils implements LocationListener {

  private static LocationUtils instance;

  private LocationManager locationManager;

  private Location lastLocation = null;

  private boolean active;
  
  private Timer timer = new Timer();
  
  private class DisableTask extends TimerTask {
    
    @Override
    public void run() {
      removeListener(LocationUtils.this);
      active = false;
      lastLocation = null;
    }
  };

  private LocationUtils(Context context) {
    locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
  }

  private static synchronized LocationUtils getInstance(Context context) {
    if (instance == null) {
      instance = new LocationUtils(context);
    }
    return instance;
  }

  public static void activeLocation(Context context) {
    getInstance(context).activeLocation();
  }

  private synchronized void activeLocation() {
    timer.cancel();
    if (!active) {
      addListener(this);
      active = true;
    }
  }

  public static void desactiveLocation(Context context) {
    getInstance(context).desactiveLocation();
  }

  private synchronized void desactiveLocation() {
    if (active) {
      timer = new Timer();
      timer.schedule(new DisableTask(), 2000);
    }
  }

  public static Location getLocation(Context context) {
    return getInstance(context).lastLocation;
  }

  public static void addListener(Context context, LocationListener listener) {
    getInstance(context).addListener(listener);
  }

  private void addListener(LocationListener listener) {
    List<String> providers = locationManager.getAllProviders();
    if (providers.contains(LocationManager.GPS_PROVIDER) && locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
      locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 3000L, 0L, listener);
    } 
    if (providers.contains(LocationManager.NETWORK_PROVIDER) && locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
      locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000L, 0L, listener);
    }
    
  }

  public static void removeListener(Context context, LocationListener listener) {
    getInstance(context).removeListener(listener);
  }

  private void removeListener(LocationListener listener) {
    locationManager.removeUpdates(listener);
  }

  @Override
  public void onLocationChanged(Location location) {    
    if(LocationManager.NETWORK_PROVIDER.equals(location.getProvider())) {
      if(lastLocation == null || LocationManager.NETWORK_PROVIDER.equals(lastLocation.getProvider()) || !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
        lastLocation = location;
        Log.d("GoToRennes", location.toString());
      }
    }
    else {
      lastLocation = location;
      Log.d("GoToRennes", location.toString());
    }
  }

  @Override
  public void onProviderDisabled(String provider) {
    
  }

  @Override
  public void onProviderEnabled(String provider) {
    
  }

  @Override
  public void onStatusChanged(String provider, int status, Bundle extras) {

  }
}

Java Source Code List

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