Android GPS Send sendGps(int number, int offset, int pause)

Description

Sends Gps data to emulator, and the start value has an offset.

License

Apache License

Parameter

Parameter	Description
number	send times
offset	is used to compute the start latitude and longitude
pause	pause interval between each sending

Declaration

public static void sendGps(int number, int offset, int pause) 

Method Source Code

//package com.java2s;
/*//from w ww  . j  a  v  a 2s.c om
 * Copyright 2012 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

import android.util.Log;

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class Main {
    public static int emulatorPort = 5554;
    private static final String ANDROID_LOCAL_IP = "10.0.2.2";
    public static final double START_LONGITUDE = 51;
    public static final double START_LATITUDE = -1.3f;
    public static final double DELTA_LONGITUDE = 0.0005f;
    public static final double DELTA_LADITUDE = 0.0005f;
    public static final String LOG_TAG = "MyTracksTest";
    public static final int TINY_WAIT_TIME = 200;
    public static final int SHORT_WAIT_TIME = 2000;
    public static boolean isEmulator = true;

    /**
     * Sends Gps data to emulator, and the start value has an offset.
     * 
     * @param number send times
     * @param offset is used to compute the start latitude and longitude
     * @param pause pause interval between each sending
     */
    public static void sendGps(int number, int offset, int pause) {
        if (number < 1) {
            return;
        }

        int pauseInterval = TINY_WAIT_TIME;
        if (pause != -1) {
            pauseInterval = pause;
        }

        // If it's a real device, does not send simulated GPS signal.
        if (!isEmulator) {
            return;
        }

        PrintStream out = null;
        Socket socket = null;
        try {
            socket = new Socket(ANDROID_LOCAL_IP, emulatorPort);
            out = new PrintStream(socket.getOutputStream());
            double longitude = START_LONGITUDE + offset * DELTA_LONGITUDE;
            double latitude = START_LATITUDE + offset * DELTA_LADITUDE;
            for (int i = 0; i < number; i++) {
                out.println("geo fix " + longitude + " " + latitude);
                longitude += DELTA_LONGITUDE;
                latitude += DELTA_LADITUDE;
                Thread.sleep(pauseInterval);
            }
            // Wait the GPS signal can be obtained by MyTracks.
            Thread.sleep(SHORT_WAIT_TIME);
        } catch (UnknownHostException e) {
            System.exit(-1);
        } catch (IOException e) {
            System.exit(-1);
        } catch (InterruptedException e) {
            System.exit(-1);
        } finally {
            if (out != null) {
                out.close();
            }
        }
    }

    /**
     * Send Gps data to emulator.
     * 
     * @param number number of signals
     * @param offset is used to compute the start latitude and longitude
     */
    public static void sendGps(int number, int offset) {
        sendGps(number, offset, -1);
    }

    /**
     * Send Gps data to emulator.
     * 
     * @param number number of signals
     */
    public static void sendGps(int number) {
        sendGps(number, 0, -1);
    }

    /**
     * Waits n milliseconds.
     * 
     * @param milliseconds time to sleep
     */
    public static void sleep(long milliseconds) {
        try {
            Thread.sleep(milliseconds);
        } catch (InterruptedException e) {
            Log.e(LOG_TAG, "Unable to sleep " + milliseconds, e);
        }
    }
}

Related

1. sendGps(int number)
2. sendGps(int number, int offset)