/*------------------------------------------------------------------------------
** Ident: Innovation en Inspiration > Google Android
** Author: rene
** Copyright: (c) Jan 22, 2009 Sogeti Nederland B.V. All Rights Reserved.
**------------------------------------------------------------------------------
** Sogeti Nederland B.V. | No part of this file may be reproduced
** Distributed Software Engineering | or transmitted in any form or by any
** Lange Dreef 17 | means, electronic or mechanical, for the
** 4131 NJ Vianen | purpose, without the express written
** The Netherlands | permission of the copyright holder.
*------------------------------------------------------------------------------
*
* This file is part of OpenGPSTracker.
*
* OpenGPSTracker 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, or
* (at your option) any later version.
*
* OpenGPSTracker 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 OpenGPSTracker. If not, see <http://www.gnu.org/licenses/>.
*
*/
package nl.sogeti.android.gpstracker.logger;
import nl.sogeti.android.gpstracker.db.GPStracking.Tracks;
import nl.sogeti.android.gpstracker.db.GPStracking.Waypoints;
import android.app.Service;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.RemoteException;
import android.preference.PreferenceManager;
import android.util.Log;
/**
* A system service as controlling the background logging of gps locations.
*
* @version $Id: GPSLoggerService.java 119 2009-10-27 17:32:07Z rcgroot@gmail.com $
* @author rene (c) Jan 22, 2009, Sogeti B.V.
*/
public class GPSLoggerService extends Service
{
private static final String PRECISION = "precision";
private static final String LOGATSTARTUP = "logatstartup";
private static final String GPS_PROVIDER = LocationManager.GPS_PROVIDER;
public static final String SERVICENAME = "nl.sogeti.android.gpstrack.logger.GPSLoggerService";
private static final String TAG = GPSLoggerService.class.getName();
private Context mContext;
private LocationManager locationManager;
private boolean logging;
private PowerManager.WakeLock mWakeLock ;
private long mTrackId = -1;
private long segmentId = -1 ;
private Location previousLocation;
private int mAcceptableAccuracy;
private OnSharedPreferenceChangeListener mSharedPreferenceChangeListener = new OnSharedPreferenceChangeListener()
{
public void onSharedPreferenceChanged( SharedPreferences sharedPreferences, String key )
{
if( key.equals( PRECISION ) )
{
requestLocationUpdates();
}
}
};
private LocationListener mLocationListener = new LocationListener()
{
public void onLocationChanged( Location location )
{
if( isLocationAcceptable(location) )
{
storeLocation(GPSLoggerService.this.mContext, location);
}
}
public void onProviderDisabled( String provider ){ }
public void onProviderEnabled( String provider ){ startNewSegment() ; }
public void onStatusChanged( String provider, int status, Bundle extras ){ }
};
private IBinder mBinder = new IGPSLoggerServiceRemote.Stub()
{
public boolean isLogging() throws RemoteException
{
return GPSLoggerService.this.isLogging();
}
public long startLogging() throws RemoteException
{
GPSLoggerService.this.startLogging();
return mTrackId;
}
public void stopLogging() throws RemoteException
{
GPSLoggerService.this.stopLogging();
}
};
/**
* Called by the system when the service is first created. Do not call this method directly. Be sure to call super.onCreate().
*/
@Override
public void onCreate()
{
super.onCreate();
this.mContext = getApplicationContext();
this.locationManager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );
boolean startImmidiatly = PreferenceManager.getDefaultSharedPreferences( this.mContext ).getBoolean( LOGATSTARTUP, false );
// Log.d( TAG, "Commence logging at startup:"+startImmidiatly );
if( startImmidiatly )
{
startLogging();
ContentValues values = new ContentValues();
values.put( Tracks.NAME, "Recorded at startup");
getContentResolver().update(
ContentUris.withAppendedId( Tracks.CONTENT_URI, mTrackId ),
values, null, null );
}
}
/**
*
* (non-Javadoc)
* @see android.app.Service#onDestroy()
*/
@Override
public void onDestroy()
{
stopLogging();
super.onDestroy();
}
/**
* (non-Javadoc)
* @see android.app.Service#onBind(android.content.Intent)
*/
@Override
public IBinder onBind(Intent intent)
{
return this.mBinder;
}
/**
* (non-Javadoc)
* @see nl.sogeti.android.gpstracker.IGPSLoggerService#startLogging()
*/
public synchronized long startLogging()
{
startNewTrack() ;
requestLocationUpdates();
PreferenceManager.getDefaultSharedPreferences( this.mContext ).registerOnSharedPreferenceChangeListener( mSharedPreferenceChangeListener );
PowerManager pm = (PowerManager) this.mContext.getSystemService( Context.POWER_SERVICE );
this.mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, SERVICENAME);
this.mWakeLock.acquire();
this.logging = true;
return mTrackId;
}
private void requestLocationUpdates()
{
this.locationManager.removeUpdates( this.mLocationListener );
int precision = new Integer( PreferenceManager.getDefaultSharedPreferences( this.mContext ).getString( PRECISION, "1" ) ).intValue();
//Log.d( TAG, "requestLocationUpdates to precision "+precision );
switch( precision )
{
case(0): // Coarse
this.mAcceptableAccuracy = 50;
this.locationManager.requestLocationUpdates( GPS_PROVIDER, 30000l, 25F, this.mLocationListener );
break;
case(1): // Normal
this.mAcceptableAccuracy = 20;
this.locationManager.requestLocationUpdates( GPS_PROVIDER, 15000l, 10F, this.mLocationListener );
break;
case(2): // Fine
this.mAcceptableAccuracy = 10;
this.locationManager.requestLocationUpdates( GPS_PROVIDER, 1000l, 5F, this.mLocationListener );
break;
default:
Log.e( TAG, "Unknown precision "+precision );
break;
}
}
/**
* (non-Javadoc)
* @see nl.sogeti.android.gpstracker.IGPSLoggerService#stopLogging()
*/
public synchronized void stopLogging()
{
PreferenceManager.getDefaultSharedPreferences( this.mContext ).unregisterOnSharedPreferenceChangeListener( this.mSharedPreferenceChangeListener );
this.locationManager.removeUpdates( this.mLocationListener );
if( this.mWakeLock != null )
{
this.mWakeLock.release();
this.mWakeLock = null ;
}
this.logging = false;
}
/**
* (non-Javadoc)
* @see nl.sogeti.android.gpstracker.IGPSLoggerService#isLogging()
*/
public boolean isLogging()
{
return this.logging;
}
/**
* Some GPS waypoints received are of to low a quality for tracking use. Here we
* filter those out.
*
* @param proposedLocation
* @return if the location is accurate enough
*/
public boolean isLocationAcceptable( Location proposedLocation )
{
boolean acceptable = true;
if( previousLocation != null && proposedLocation.hasAccuracy() )
{
acceptable = proposedLocation.getAccuracy() < this.mAcceptableAccuracy
&& proposedLocation.getAccuracy() < previousLocation.distanceTo( proposedLocation ) ;
}
return acceptable;
}
/**
* Trigged by events that start a new track
*/
private void startNewTrack()
{
Uri newTrack = this.mContext.getContentResolver().insert( Tracks.CONTENT_URI, null );
mTrackId = new Long(newTrack.getLastPathSegment()).longValue();
startNewSegment() ;
}
/**
* Trigged by events that start a new segment
*/
private void startNewSegment()
{
Uri newSegment = this.mContext.getContentResolver().insert( Uri.withAppendedPath( Tracks.CONTENT_URI, mTrackId+"/segments" ), null );
segmentId = new Long(newSegment.getLastPathSegment()).longValue();
}
/**
* Use the ContentResolver mechanism to store a received location
* @param location
*/
public void storeLocation(Context context, Location location )
{
previousLocation = location;
ContentValues args = new ContentValues();
args.put( Waypoints.LATITUDE, new Double( location.getLatitude() ) );
args.put( Waypoints.LONGITUDE, new Double( location.getLongitude() ) );
args.put( Waypoints.SPEED, new Float( location.getSpeed() ) );
args.put( Waypoints.TIME, new Float( location.getTime() ) );
if( location.hasAccuracy() )
{
args.put( Waypoints.ACCURACY, new Float( location.getAccuracy() ) );
}
if( location.hasAltitude() )
{
args.put( Waypoints.ALTITUDE, new Double( location.getAltitude() ) );
}
if( location.hasBearing() )
{
args.put( Waypoints.BEARING, new Float( location.getBearing() ) );
}
context.getContentResolver().insert( Uri.withAppendedPath( Tracks.CONTENT_URI, mTrackId+"/segments/"+segmentId+"/waypoints" ), args );
}
}