Android Open Source - android-gps-uploader G P S Tracker

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Back to project page android-gps-uploader.

License

The source code is released under:

MIT License

Java Source Code

/** 
 * The MIT License (MIT)//w w w  .  j  a v  a 2  s .com
 *
 * Copyright (c) 2014 John Nahlen (john.nahlen@gmail.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * */
package com.bughousedb.GPSTracker;

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

public class GPSTracker implements Service {
  private Location lastUploadedLocation;
  private Location lastLocation;
  private List<Location> locationHistory;
  private Timer timer;
  private boolean gotFirstFix;
  private MainActivity mainActivity;
  private String uploadUrl;
  private int uploadFrequency;
  private ServiceStatus serviceStatus;
  private List<LocationCallback> locationChangedCallbacks;
  private LocationListener locationListener;
  private LocationManager locationManager;
  private String locationProvider;
  
  private void gotFirstFix() {
    gotFirstFix = true;
    TimerTask task = new TimerTask() {
      public void run() {
        Location location = lastLocation;
        
        if (lastUploadedLocation != null) {
          boolean areLocationsTheSame = !Utils.areLocationsDifferent(location, lastUploadedLocation);
          if (areLocationsTheSame) {
            return;
          }
        }
        
        if (location == null) {
          return;
        }
        
        String postbody = mainActivity.getDeviceName() + "," + (location.getTime()/1000) + "," + Utils.round(location.getLatitude()) + "," + Utils.round(location.getLongitude()) + "," + location.getAltitude() + "," + location.getSpeed() + "," + location.getAccuracy() + "," + location.getBearing() + "," + "\n";
        mainActivity.sendMessageToTextView("Uploading Coordinates Now\n");
        System.out.println("Calling URL: " + getUploadUrl());
        Utils.uploadToServer(mainActivity, getUploadUrl(), "coords="+postbody);
        lastUploadedLocation = location;
      }
    };
    
    timer.scheduleAtFixedRate(task, 0, getUploadFrequency());
  }
  
  // Called when the activity's onLowMemory() method is fired
  public void cleanup() {
    locationHistory.clear();
  }
  
  public Location getLastKnownLocation() {
    return lastLocation;
  }
  
  public void setUploadUrl(String url) {
    this.uploadUrl = url;
  }
  
  public String getUploadUrl() {
    return this.uploadUrl;
  }
  
  public void init() {
    serviceStatus = ServiceStatus.INITIALIZED;
    locationHistory = new ArrayList<Location>();
    timer = new Timer();
    gotFirstFix = false;
    locationChangedCallbacks = new ArrayList<LocationCallback>();
    locationListener = new LocationListener() {
      public void onStatusChanged(String provider, int status, Bundle extras) {
        System.out.println(String.format("Received notification of status changed: %s %s",provider,extras.getString("satellites")));
      }
      
      public void onProviderEnabled(String provider) {
        System.out.println(String.format("Received notification that location provider %s has been enabled",provider));
      }
      
      public void onProviderDisabled(String provider) {
        System.out.println(String.format("Received notification that location provider %s has been disabled",provider));
      }
      
      public void onLocationChanged(Location location) {
        for(LocationCallback locationCallback : locationChangedCallbacks) {
          locationCallback.setLocation(location);
          locationCallback.run();
        }
      }
    };
    mainActivity.sendMessageToTextView("Please wait while a GPS fix is acquired...\n");
    locationManager = (LocationManager)mainActivity.getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
    locationProvider = LocationManager.GPS_PROVIDER;
    
//    if (!locationManager.isProviderEnabled(locationProvider)) {
//      List<String> providers = locationManager.getAllProviders();
//      for(String name : providers) {
//        if (locationManager.isProviderEnabled(name)) {
//          LocationProvider _locationProvider = locationManager.getProvider(name);
//          if (!_locationProvider.hasMonetaryCost()) {
//            locationProvider = _locationProvider.getName();
//          }
//        }
//      }
//    }
    
    System.out.println(String.format("Using locationProvider=%s",locationProvider));
    locationChangedCallbacks.add(new LocationCallback() {
      public void run() {
        Location location = getLocation();
        if (location == null) return;
        if (lastLocation != null && !Utils.areLocationsDifferent(location, lastLocation)) {
          return;
        }
        
        String str = Utils.locationToString(location);
        mainActivity.sendMessageToTextView(str);
        locationHistory.add(location);
        lastLocation = location;
        if (!gotFirstFix) {
          gotFirstFix();
        }
      }
    });
  }
  
  public void start() {
    if (serviceStatus == ServiceStatus.STARTED) {
      return;
    }
    
    System.out.println("GPS Tracker Service has been started");
    locationManager.requestLocationUpdates(locationProvider, 0, 0, locationListener);
    serviceStatus = ServiceStatus.STARTED;
  }
  
  public void stop() {
    if (serviceStatus == ServiceStatus.STOPPED) {
      return;
    }
    
    System.out.println("GPS Tracker Service has been stopped");
    locationManager.removeUpdates(locationListener);
    serviceStatus = ServiceStatus.STOPPED;
  }

  public MainActivity getMainActivity() {
    return mainActivity;
  }

  public void setMainActivity(MainActivity mainActivity) {
    this.mainActivity = mainActivity;
  }

  public int getUploadFrequency() {
    return uploadFrequency;
  }

  public void setUploadFrequency(int uploadFrequency) {
    this.uploadFrequency = uploadFrequency;
  }
}

Java Source Code List

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