Android Open Source - Look Location Manager

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License

The source code is released under:

====================== LOOK! LICENSING TERMS ====================== look! is licensed under the BSD 3-Clause (also known as "BSD New" or "BSD Simplified"), as follows: Copyright (c) 2010-2012, Look...

Java Source Code

/**
*-----------------------------------------------------------------------------
* Copyright (c) 2012, Look! Development Team
* All rights reserved.//from  w w  w  .  j  av a 2  s . c o  m
*
* Distributed under the terms of the BSD Simplified License.
*
* The full license is in the LICENSE file, distributed with this software.
*-----------------------------------------------------------------------------
*/
package es.ucm.look.location;

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

import android.content.Context;
import es.ucm.look.ar.math.geom.Point3;
import es.ucm.look.locationProvider.LocationProvider;
import es.ucm.look.locationProvider.map.Mapa;
import es.ucm.look.locationProviderWifi.WifiLocation;
import es.ucm.look.locationProviderWifi.wifi.Lugar;

/**
 * Provides a public API for the location modules.
 * 
 * @author Jorge Creixell Rojo
 * 
 */
public class LocationManager {
  
  /**
   * Inertial Navigation System Refresh Rate in miliseconds.
   */
  private static final int INS_REFRESH_RATE = 200;
  
  /**
   * Wifi Location System Refresh Rate in miliseconds.
   */
  private static final int WIFI_REFRESH_RATE = WifiLocation.MAX_COUNT * 1000;
  
  private Point3 lastLocation = new Point3(0,0,0);


  
  /**
   * Application context.
   */
  Context context = null;
  
  /**
   * Whether or not to use the inertial navigation system.
   */
  private boolean ins = false;
  
  /**
   * Whether or not to use the wifi location system.
   */
  private boolean wifi = false;
  
  /**
   * Timer to schedule wifi location updates.
   */
  private Timer wifiTimer = null;
  
  /**
   * Timer to schedule inertial navigation system updates.
   */
  private Timer insTimer = null;
  
  /**
   * Current location in (x,y,z) coordinates.
   */
  private Point3 location = new Point3(0, 0, 0);
  
  /**
   * Inertial Navigation System location provider.
   */
  private LocationProvider insLocationProvider = null;
  
  /**
   * Wifi location provider.
   */
  private WifiLocation wifiLocationProvider = null;



  
  /**
   * Initializes the location system.
   * @param context
   *       Application context
   * @param ins
   *       Whether to use the inertial navigation system
   * @param wifi
   *       Whether to use the wifi positioning system
   */
  public LocationManager(Context context, boolean ins, boolean wifi) {
    super();
    this.ins = ins;
    this.wifi = wifi;
    this.context = context;
  }
  
  /**
   * Run the selected location systems
   */
  public void start() {
    if (ins) {
      insLocationProvider= new LocationProvider(context);
      insTimer = new Timer();
      TimerTask timerTask = new TimerTask() {
        public void run() {
          insLocationProvider.run();
          float position[] = LocationProvider.getDisplacement();
          float rawCoords[] = new float[2];
          rawCoords[0] = position[0];
          rawCoords[1] = position[1];
          float[] mapCoords = Mapa.toMapCS(rawCoords);
          lastLocation = location;
          location.set(location.x + mapCoords[0], location.y + mapCoords[1], location.z);
          insLocationProvider.resetINS();
        }
      };
      insTimer.scheduleAtFixedRate(timerTask, 0, INS_REFRESH_RATE);
    }
    
    if (wifi) {
      wifiLocationProvider = WifiLocation.getInstance();
      wifiLocationProvider.start(context);
      
      wifiTimer = new Timer();
      TimerTask timerTask = new TimerTask() {
        public void run() {
          Lugar lugar = wifiLocationProvider.getPosicion();
          location.set(lugar.getX(), lugar.getY(), lugar.getPlanta());
        }
      };
      wifiTimer.scheduleAtFixedRate(timerTask, 0, WIFI_REFRESH_RATE);
    }
  }
  
  /**
   * Stops the running location systems 
   */
  public void stop() {
    if (ins) {
      insTimer.cancel();
    }
    
    if (wifi) {
      wifiTimer.cancel();
      wifiLocationProvider.stop();
    }
  }
  
  /**
   * Returns whether the user is walking or not
   * @ return whether the user is walking
   */
  public boolean isWalking() {
    if (ins)
      return LocationProvider.isMoving();
    else
      return false;
  }
  
  /**
   * Returns the current wifi node information
   * @ return current wifi node information
   */
  public Lugar getWifiNode() {
    if (wifi)
      return wifiLocationProvider.getPosicion();
    else
      return null;
  }
  
  /**
   * Returns the current position
   * @ return the current position in (x,y,z) coordinates
   */
  public Point3 getPosition() {
    return location;
  }
  
  
  public Point3 getDisplacement() {
    return new Point3(lastLocation.x-location.x, lastLocation.y-location.y, lastLocation.z-location.z);
  }
  
}

Java Source Code List

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