Android Open Source - Civic_Hackathon Location Monitering Service

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License

The source code is released under:
Apache License
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Java Source Code

package com.umer.wingoku.androidhackathone;
/*from  ww  w. ja va 2  s .  co  m*/
import java.util.Timer;
import java.util.TimerTask;

import android.app.Service;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

/* ========================================================================
 * Author: Umer Farooq 
 * Website: www.wingoku.com
 * 
 * Contributers: Ibrahim Ahmed
 *          Asif Ali Khan
 * 
 * Website: http://www.wingoku.com
 * 
 */

public class LocationMoniteringService extends Service{

  double userLat, userLongt, hospitalLat, hospitalLong;
  GPSLocation gpsLocation;
  
  private String Shared_Pref_File_Name = "UmerHackathonPrefs";
  private String SHARED_PREF_RATING = "RatingEligible";
  
  String hospitalName ="";
  
  SharedPreferences sharedPref;
  
  
  @Override
  public IBinder onBind(Intent arg0) {
        
    return null;
  }
  
  
  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    
//    userLat = intent.getDoubleExtra("userLat", 0);
//    userLongt = intent.getDoubleExtra("userLongt", 0);

    hospitalLat = intent.getDoubleExtra("hospitalLat", -1);
    hospitalLong = intent.getDoubleExtra("hospitalLong", -1);
    
    hospitalName = intent.getStringExtra("hospitalName");
    
    Log.e("Testing", "hos "+ hospitalLat + "   "+ hospitalLong);
    
    
    
    sharedPref = getSharedPreferences(Shared_Pref_File_Name, 0); // 0 means mode private
    
    if(sharedPref.getBoolean("appIsRunFirstTime", true))
    {
      SharedPreferences.Editor prefEditor = sharedPref.edit();
      
      prefEditor.putBoolean("appIsRunFirstTime", false); 
      
      prefEditor.putBoolean(SHARED_PREF_RATING, false);
      
      prefEditor.commit();
      
    }
    
    gpsLocation = new GPSLocation(getApplicationContext());
    
    gpsLocation.locationContinousUpdate();
    
    
    new Timer().scheduleAtFixedRate( new TimerTask() {
      
      @Override
      public void run() {
        
        checkUserGpsCoords();
      }
    }, 500, 30000); // call checkUserGps() after every 30secs
    
    return START_REDELIVER_INTENT;
  }

  
  
  public void checkUserGpsCoords()
  {
    Log.e("Testing", "checking");
    
    if(findNearestHospital() <= 0.500) // within 500 meters of hospital
    {
      // eligible for rating
      
      SharedPreferences.Editor prefEditor = sharedPref.edit();
      
      prefEditor.putBoolean(SHARED_PREF_RATING, true);
      
      prefEditor.commit();
    
      
      RatedHospitalDB rateDB = new RatedHospitalDB(getApplicationContext());
      
      try
      {
        rateDB.writeToDB(hospitalName);
      }
      catch (Exception e) {
        // TODO: handle exception
      }
    }
  }
  
  
  
  
  public double findNearestHospital()
  {
    
    final int earthRadius = 6371; // km
    
    double h_lat,h_longt, dLat, dLongt;
    
    h_lat = h_longt = 0;
    
    double a,c;
    
    double distance;
    
    
    h_lat = gpsLocation.getUserLat();
    h_longt = gpsLocation.getUserLongt();
    
    
    dLat =  Math.toRadians((h_lat - hospitalLat));
    
    dLongt = Math.toRadians((h_longt -  hospitalLong));
    
    h_lat = Math.toRadians(h_lat);
    h_longt = Math.toRadians(h_longt);
    
    a = Math.sin(dLat/2) * Math.sin(dLat/2) +
            Math.sin(dLongt/2) * Math.sin(dLongt/2) * Math.cos(userLongt) * Math.cos(h_lat); 
    
    c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
    
    distance = earthRadius * c;
    
    Log.e("Testing", "distance "+ distance);
    
    return distance;
  }
  
}
Java Source Code List
