Android Open Source - Look Location Provider

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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...

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Java Source Code

/**
*-----------------------------------------------------------------------------
* Copyright (c) 2012, Look! Development Team
* All rights reserved.//w ww.j a  v  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.locationProvider;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;

/**
 * Adapter of the INS to the Look! framework
 * 
 * @author Jorge Creixell Rojo
 * Based on Indoor Navigation System for Handheld Devices
 * by Manh Hung V. Le, Dimitris Saragas, Nathan Webb
 * 
 */
public class LocationProvider implements SensorEventListener, Runnable {

  /**
   * Application context.
   */
  private static Context CONTEXT;

  /**
   * Android Sensor Manager.
   */
  private SensorManager mSensorManager;

  /**
   * Contructor. Initializes the INS and registers listeners.
   * 
   * @param context
   *            Application context.
   */
  public LocationProvider(Context context) {
    LocationProvider.CONTEXT = context;

    Positioning.initialize();

    mSensorManager = (SensorManager) CONTEXT
        .getSystemService(Context.SENSOR_SERVICE);

    Positioning.startPositioning();
    Positioning.resetINS();

    Sensor asensor = mSensorManager
        .getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    Sensor msensor = mSensorManager
        .getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
    Sensor osensor = mSensorManager
        .getDefaultSensor(Sensor.TYPE_ORIENTATION);
    mSensorManager.registerListener(this, asensor,
        SensorManager.SENSOR_DELAY_FASTEST);
    mSensorManager.registerListener(this, msensor,
        SensorManager.SENSOR_DELAY_FASTEST);
    mSensorManager.registerListener(this, osensor,
        SensorManager.SENSOR_DELAY_FASTEST);
  }

  /**
   * Add new motion sample to the queue
   * 
   * @return current context.
   */
  public static Context getContext() {
    return CONTEXT;
  }

  @Override
  public void onAccuracyChanged(Sensor arg0, int arg1) {

  }

  @Override
  public void onSensorChanged(SensorEvent event) {
    int type = event.sensor.getType();
    float[] data = Util.copyArray(event.values);
    if (type == Sensor.TYPE_ACCELEROMETER) {
      DeviceSensor.setDevA(data);
      Positioning.updateINS();

    } else if (type == Sensor.TYPE_MAGNETIC_FIELD) {
      DeviceSensor.setDevM(data);
      DeviceSensor.toEarthCS();
    } else if (type == Sensor.TYPE_ORIENTATION) {
      DeviceSensor.setDevO(data);
    }

  }

  /**
   * Recalculates distance moved
   */
  @Override
  public void run() {
    Positioning.process();

  }
  
  public void resetINS() {
    Positioning.resetINS();
  }

  /**
   * Returns position in map coordinates.
   * 
   * @return Position in map coordinates
   */
  public static float[] getMapPosition() {
    return Positioning.mapPosition();
  }

  /**
   * Returns raw position
   * 
   * @return Position in world coordinates
   */
  public static float[] getPosition() {
    return Positioning.position();
  }
  
  /**
   * Returns relative displacement.
   * 
   * @return relative displacement
   */

  public static float[] getDisplacement() {
    return Positioning.displacement();
  }
  
  /**
   * Returns whether the device is moving or not.
   * 
   * @return whether the device is moving or not
   */
  public static boolean isMoving() {
    return Positioning.isMoving();
  }

}

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