com.artur.softwareproject.GpsService.java Source code

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Here is the source code for com.artur.softwareproject.GpsService.java

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/* Copyright 2017 Artur Baltabayev, Jean Bsche, Martin Kern, Gabriel Scheibler
 *
 * This file is part of ViSensor.
 *
 * ViSensor 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.
 *
 * ViSensor 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 ViSensor.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.artur.softwareproject;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

/**
 * Created by Martin Kern on 16.05.2017.
 * This service gets the data from the GPS module.
 */

public class GpsService extends Service implements LocationListener, Runnable {
    private static final String TAG = GpsService.class.getSimpleName();

    //variables
    private double[] gpsPosition = { 0, 0, 0 };
    private double[] xBuffer = { 0, 0, 0, 0 };
    private double[] yBuffer = { 0, 0, 0, 0 };

    private int index = 0;

    private boolean gpsStatus;
    private boolean gpsStatusUpdate = true;

    //formalities
    private LocationManager gpsManager;
    private Handler gpsStatusHandler = new Handler();

    //onDestroy=========================================================================================
    @Override
    public void onDestroy() {
        gpsManager = null;

        gpsStatusUpdate = false;

        super.onDestroy();
    }
    //onDestroy=end=====================================================================================

    //LocationListener Overrides========================================================================

    public void onLocationChanged(Location location) {
        gpsPosition[0] = location.getLongitude();
        gpsPosition[1] = location.getLatitude();
        gpsPosition[2] = location.getAltitude();

        Intent gpsIntent = new Intent();

        gpsIntent.putExtra("gpsRawData", gpsPosition);
        gpsIntent.setAction("gpsFilter");

        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(gpsIntent);
    }

    //
    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        /*nothing*/}

    @Override
    public void onProviderEnabled(String provider) {
        /*nothing*/}

    @Override
    public void onProviderDisabled(String provider) {
        /*nothing*/}
    //LocationListener Overrides=End====================================================================

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.d(TAG, "GpsService was created.");

        gpsStatus = false;

        gpsManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        checkPermission("android.permission.ACCESS_FINE_LOCATION", 1, 0);

        gpsManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);

        Thread gpsStatusThread = new Thread(this);
        gpsStatusThread.start();
    }

    @Override
    public void run() {
        if (!gpsStatusUpdate) {
            return;
        }

        xBuffer[index] = gpsPosition[0];
        yBuffer[index] = gpsPosition[1];

        index++;

        if (index > 3) {
            index = 0;
        }

        //If there was no update in the last 3 seconds we assume that the gps signal was lost.
        if (xBuffer[0] == xBuffer[1] && xBuffer[1] == xBuffer[2] && xBuffer[2] == xBuffer[3]
                && yBuffer[0] == yBuffer[1] && yBuffer[1] == yBuffer[2] && yBuffer[2] == yBuffer[3]) {
            if (gpsStatus) {
                gpsStatus = false;

                Intent gpsStatusIntent = new Intent();

                gpsStatusIntent.putExtra("gpsStatus", false);
                gpsStatusIntent.setAction("gpsStatusFilter");

                LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(gpsStatusIntent);
            }
        } else {
            if (!gpsStatus) {
                gpsStatus = true;

                Intent gpsStatusIntent = new Intent();

                gpsStatusIntent.putExtra("gpsStatus", true);
                gpsStatusIntent.setAction("gpsStatusFilter");

                LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(gpsStatusIntent);
            }
        }

        gpsStatusHandler.postDelayed(this, 1000);
    }
}

//EOF