/**
* Global Sensor Networks (GSN) Source Code
* Copyright (c) 2006-2014, Ecole Polytechnique Federale de Lausanne (EPFL)
* <p/>
* This file is part of GSN.
* <p/>
* GSN 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.
* <p/>
* GSN 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.
* <p/>
* You should have received a copy of the GNU General Public License
* along with GSN. If not, see <http://www.gnu.org/licenses/>.
* <p/>
* File: gsn-tiny/src/tinygsn/model/wrappers/AndroidGPSWrapper.java
*
* @author Do Ngoc Hoan
*/
package tinygsn.model.wrappers;
import java.io.Serializable;
import java.util.ArrayList;
import tinygsn.beans.DataField;
import tinygsn.beans.DataTypes;
import tinygsn.beans.StaticData;
import tinygsn.beans.StreamElement;
import tinygsn.beans.WrapperConfig;
import tinygsn.model.utils.Parameter;
import tinygsn.model.utils.ParameterType;
import tinygsn.services.WrapperService;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import org.epfl.locationprivacy.util.Utils;
import static android.os.Debug.startMethodTracing;
public class AndroidGPSWrapper extends AbstractWrapper implements LocationListener {
public AndroidGPSWrapper(WrapperConfig wc) {
super(wc);
}
public AndroidGPSWrapper() {
}
// A GPS position is represented as a rectangle (top left and bottom right points)
private static final String[] FIELD_NAMES = new String[]{"latitudeTopLeft", "longitudeTopLeft", "latitudeBottomRight", "longitudeBottomRight"};
private static final Byte[] FIELD_TYPES = new Byte[]{DataTypes.DOUBLE, DataTypes.DOUBLE, DataTypes.DOUBLE, DataTypes.DOUBLE};
private static final String[] FIELD_DESCRIPTION = new String[]{"TopLeftLatitude", "TopLeftLongitude", "BottomRightLatitude", "BottomRightLongitude"};
private static final String[] FIELD_TYPES_STRING = new String[]{"double", "double", "double", "double"};
public final Class<? extends WrapperService> getSERVICE() {
return GPSService.class;
}
private LocationManager locationManager;
private int timeToShutdown = -1;
boolean isGPSEnabled = false;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0;
private static final long MIN_TIME_BW_UPDATES = 5000;
@Override
public void runOnce() {
updateWrapperInfo();
while (getConfig().isRunning()) {
if (dcDuration > 0) {
timeToShutdown = 40;
startGPS();
try {
Thread.sleep(dcInterval * 1000);
} catch (InterruptedException e) {
}
} else {
timeToShutdown--;
if (timeToShutdown < 0) {
break;
} else {
startGPS();
try {
Thread.sleep(dcInterval * 1000);
} catch (InterruptedException e) {
}
}
}
try {
getConfig().setRunning(StaticData.getWrapperByName(getWrapperName()).getConfig().isRunning());
} catch (Exception e) {
}
}
stopGPS();
}
public void startGPS() throws SecurityException{
try {
//if ((boolean) Utils.getBuildConfigValue(StaticData.globalContext, "GPSPERFORMANCE")) {
// startMethodTracing("Android/data/tinygsn.gui.android/whole_gps_process" + System.currentTimeMillis());
//}
locationManager = (LocationManager) StaticData.globalContext.getSystemService(StaticData.globalContext.LOCATION_SERVICE);
boolean isGPSUsageEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
boolean isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled) {
// getting GPS status
isGPSEnabled = true;
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSUsageEnabled) {
locationManager.requestLocationUpdates(
locationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
}
}
Location location = null;
StreamElement streamElement = null;
if (isGPSEnabled && isNetworkEnabled) {
Location tempLocation = locationManager.getLastKnownLocation(locationManager.NETWORK_PROVIDER);
if (tempLocation != null) {
location = tempLocation;
}
}
if (isGPSEnabled && isGPSUsageEnabled) {
Location tempLocation = locationManager.getLastKnownLocation(locationManager.GPS_PROVIDER);
if (tempLocation != null && tempLocation.getTime() >= location.getTime()) {
location = tempLocation;
}
}
if (location != null) {
streamElement = new StreamElement(FIELD_NAMES,
FIELD_TYPES,
new Serializable[]{location.getLatitude(), location.getLongitude(),
location.getLatitude(), location.getLongitude()});
streamElement.setTimeStamp(location.getTime());
postStreamElement(streamElement);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void stopGPS() throws SecurityException{
if (locationManager != null) {
locationManager.removeUpdates(this);
}
isGPSEnabled = false;
}
@Override
public DataField[] getOutputStructure() {
ArrayList<DataField> output = new ArrayList<DataField>();
for (int i = 0; i < FIELD_NAMES.length; i++)
output.add(new DataField(FIELD_NAMES[i], FIELD_TYPES_STRING[i],
FIELD_DESCRIPTION[i]));
return output.toArray(new DataField[]{});
}
@Override
public String[] getFieldList() {
return FIELD_NAMES;
}
@Override
public Byte[] getFieldType() {
return FIELD_TYPES;
}
@Override
public void onLocationChanged(Location location) {
StreamElement streamElement = new StreamElement(FIELD_NAMES, FIELD_TYPES,
new Serializable[]{location.getLatitude(), location.getLongitude(),
location.getLatitude(), location.getLongitude()});
postStreamElement(streamElement);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
public static class GPSService extends WrapperService {
public GPSService() {
super("gpsService");
}
}
}