Android Open Source - android_retrieval_system Location Packet

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * This file is part of Android retrieval system project.
 * //from w  ww.jav a 2 s  . c om
 * Android retrieval system 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. 
 * 
 * Android retrieval system 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 Android retrieval system. If not, see <http://www.gnu.org/licenses/>.
 */

package net.deerhunter.ars.protocol.packets;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.Date;

/**
 * This class contains all the information and methods needed to send the
 * locations to the server.
 * 
 * @author DeerHunter (vityokkv73@gmail.com)
 */
public class LocationPacket extends BasePacket {
  private double latitude;
  private double longitude;
  private double altitude;
  private float accuracy;
  private String provider;
  private long time;
  private byte[] binaryPacket;

  /**
   * Constructs a new LocationPacket using all necessary parameters.
   * 
   * @param latitude Latitude of the location
   * @param longitude Longitude of the location
   * @param altitude Altitude of the location
   * @param accuracy Accuracy of the location
   * @param provider Provider of the location
   * @param time Time when this location was given
   */
  public LocationPacket(double latitude, double longitude, double altitude, float accuracy, String provider, long time) {
    this.latitude = latitude;
    this.longitude = longitude;
    this.altitude = altitude;
    this.accuracy = accuracy;
    this.provider = provider;
    this.time = time;
    generateBinaryPacket();
  }

  /**
   * Method generate a binary representation of a Location packet.
   */
  private void generateBinaryPacket() {
    ByteArrayOutputStream outputArray = new ByteArrayOutputStream(300);
    Charset UTF8Charset = Charset.forName("UTF-8");
    try {
      formatWriteStringToArray(outputArray, String.valueOf(latitude), UTF8Charset);
      formatWriteStringToArray(outputArray, String.valueOf(longitude), UTF8Charset);
      formatWriteStringToArray(outputArray, String.valueOf(altitude), UTF8Charset);
      formatWriteStringToArray(outputArray, String.valueOf(accuracy), UTF8Charset);
      formatWriteStringToArray(outputArray, provider, UTF8Charset);

      // write a time to the output stream
      ByteBuffer longArray = ByteBuffer.allocate(8);
      longArray.putLong(time);
      outputArray.write(longArray.array());

      binaryPacket = outputArray.toByteArray();
    } catch (IOException e) {
    }
  }

  /**
   * Method returns a binary representation of a location packet.
   * 
   * @return Binary representation of a location packet
   */
  public byte[] getBinaryPacket() {
    return binaryPacket;
  }

  @Override
  public String toString() {
    StringBuilder builder = new StringBuilder(300);
    builder.append("LocationPacket { ");
    builder.append("latitude = " + latitude);
    builder.append(", longitude = " + longitude);
    builder.append(", altitude = " + altitude);
    builder.append(", accuracy = " + accuracy);
    builder.append(", provider = " + provider);
    builder.append(", time = " + new Date(time));
    builder.append(" }");
    return builder.toString();
  }

  /**
   * Methods returns a latitude of the location.
   * @return Latitude of the location
   */
  public double getLatitude() {
    return latitude;
  }

  /**
   * Methods returns a longitude of the location.
   * @return Longitude of the location
   */
  public double getLongitude() {
    return longitude;
  }

  /**
   * Methods returns an altitude of the location.
   * @return Altitude of the location
   */
  public double getAltitude() {
    return altitude;
  }

  /**
   * Methods returns an accuracy of the location.
   * @return Accuracy of the location
   */
  public float getAccuracy() {
    return accuracy;
  }

  /**
   * Methods returns a provider of the location.
   * @return Provider of the location
   */
  public String getProvider() {
    return provider;
  }

  /**
   * Method returns a time when the location was given.
   * 
   * @return Time when the location was given
   */
  public long getTime() {
    return time;
  }
}

Java Source Code List

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