Android Open Source - ubihelper Cell Location Channel

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (c) 2012 The University of Nottingham
 * // w w w . j  a v  a 2 s. c  o m
 * 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;
  }

}

Java Source Code List

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