uk.ac.horizon.ubihelper.service.channel.CellLocationChannel.java Source code

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Here is the source code for uk.ac.horizon.ubihelper.service.channel.CellLocationChannel.java

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/**
 * Copyright (c) 2012 The University of Nottingham
 * 
 * This file is part of ubihelper
 *
 *  ubihelper is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ubihelper 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with ubihelper. If not, see <http://www.gnu.org/licenses/>.
 *  
 *  @author Chris Greenhalgh (cmg@cs.nott.ac.uk), The University of Nottingham
 */
package uk.ac.horizon.ubihelper.service.channel;

import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Service;
import android.os.Handler;
import android.telephony.CellLocation;
import android.telephony.NeighboringCellInfo;
import android.telephony.TelephonyManager;
import android.telephony.cdma.CdmaCellLocation;
import android.telephony.gsm.GsmCellLocation;

/**
 * @author cmg
 *
 */
public class CellLocationChannel extends PollingChannel {
    private boolean includeNeighbours;
    private TelephonyManager telephony;

    /**
     * @param handler
     * @param name
     */
    public CellLocationChannel(Handler handler, Service service, String name, boolean includeNeighbours) {
        super(handler, name);
        this.includeNeighbours = includeNeighbours;
        telephony = (TelephonyManager) service.getSystemService(Service.TELEPHONY_SERVICE);
    }

    @Override
    protected boolean startPoll() {
        if (telephony != null) {
            CellLocation loc = telephony.getCellLocation();
            JSONObject value = new JSONObject();
            try {
                value.put("timestamp", System.currentTimeMillis());
                if (loc instanceof GsmCellLocation) {
                    GsmCellLocation gsm = (GsmCellLocation) loc;
                    if (gsm.getCid() != (-1))
                        value.put("cid", gsm.getCid());
                    if (gsm.getLac() != (-1))
                        value.put("lac", gsm.getLac());
                    value.put("type", "gsm");
                } else if (loc instanceof CdmaCellLocation) {
                    CdmaCellLocation cdma = (CdmaCellLocation) loc;
                    if (cdma.getBaseStationId() != (-1))
                        value.put("baseStationId", cdma.getBaseStationId());
                    if (cdma.getBaseStationLatitude() != Integer.MAX_VALUE)
                        value.put("baseStationLat", cdma.getBaseStationLatitude());
                    if (cdma.getBaseStationLongitude() != Integer.MAX_VALUE)
                        value.put("baseStationLon", cdma.getBaseStationLongitude());
                    if (cdma.getNetworkId() != (-1))
                        value.put("baseStationId", cdma.getNetworkId());
                    if (cdma.getNetworkId() != (-1))
                        value.put("networkId", cdma.getNetworkId());
                    if (cdma.getSystemId() != (-1))
                        value.put("systemId", cdma.getSystemId());
                    value.put("type", "cdma");
                } else if (loc != null) {
                    value.put("type", loc.getClass().getName());
                }
                if (includeNeighbours) {
                    List<NeighboringCellInfo> neighbors = telephony.getNeighboringCellInfo();
                    JSONArray ns = new JSONArray();
                    value.put("neighbors", ns);
                    for (NeighboringCellInfo neighbor : neighbors) {
                        JSONObject n = new JSONObject();
                        if (neighbor.getCid() != (-1))
                            n.put("cid", neighbor.getCid());
                        if (neighbor.getLac() != (-1))
                            n.put("lac", neighbor.getLac());
                        n.put("networkType", neighbor.getNetworkType());
                        n.put("rssi", neighbor.getRssi());
                        ns.put(n);
                    }
                }
            } catch (JSONException e) {
                // shouldn't
            }
            onNewValue(value);
        }
        return false;
    }

}