GetLocationWithGPS.java

/**
 * Created with IntelliJ IDEA.
 * User: gemengqin
 * Date: 10/2/13
 * Time: 2:40 PM
 * To change this template use File | Settings | File Templates.
 */

package com.onemore.karungguniapp.LBS;

import java.util.HashMap;

import android.app.AlertDialog;
import android.app.Service;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.location.Location;
import android.location.LocationManager;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.provider.Settings;
import android.util.Log;

import com.onemore.karungguniapp.AppData;
import com.onemore.karungguniapp.KarungGuniActivity;

public class GetLocationWithGPS extends Service {

	public static boolean DEBUG =true;
	public static String gotMyLoc;
	public static double[] myLoc= new double[2];

	public static final String LOC_DATA = "LOC_DATA";
	public static final String UNABLE = "Unable to get current location";
	public static final String GET_MY_LOC_SUCCESS="got current location successfully";
	private Context mContext;

	public LocationManager locationMgr;
	//    private GpsListener gpsListener;
	//    private GpsStatus gpsStatus;
	private Handler handler;

	//    private TextView title;
	//    private TextView detail;
	//    private TextView gpsEvents;
	//    private TextView satelliteStatus;
	//    private Button openGMap;

	private double latitude;
	private double longitude;

	@Override
	public void onCreate() {

		super.onCreate();
		mContext = getApplicationContext();
		locationMgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		//        gpsListener = new GpsListener();
		myLoc = new double[2];

		handler = new Handler() {
			public void handleMessage(Message m) {
				Log.d(KarungGuniActivity.LOG_TAG, "Handler returned with message: " + m.toString());
				if (m.what == LocationHelper.MESSAGE_CODE_LOCATION_FOUND) {
					//                    Toast.makeText(mContext,"HANDLER RETURNED\nlat:" + m.arg1 + "\nlon:" + m.arg2, Toast.LENGTH_LONG);
					if (DEBUG) Log.v(LOC_DATA, "HANDLER RETURNED\nlat:" + m.arg1 + "\nlon:" + m.arg2);

					latitude = m.arg1;
					longitude = m.arg2;
					myLoc =new double[]{latitude*1e-6,longitude*1e-6};
					gotMyLoc = GET_MY_LOC_SUCCESS ;

				} else if (m.what == LocationHelper.MESSAGE_CODE_LOCATION_NULL) {
					//detail.setText("HANDLER RETURNED\nunable to get location");
					//                    Toast.makeText(mContext,"HANDLER RETURNED\nunable to get location",Toast.LENGTH_LONG);
					if (DEBUG) Log.v(LOC_DATA, "HANDLER RETURNED\nunable to get location");
					Location lastLocation = locationMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
					if (lastLocation != null){
						latitude = lastLocation.getLatitude();
						longitude = lastLocation.getLongitude();
						myLoc =new double[]{latitude,longitude};
						gotMyLoc= GET_MY_LOC_SUCCESS;
					}   else{
						gotMyLoc= UNABLE;
					}
				} else if (m.what == LocationHelper.MESSAGE_CODE_PROVIDER_NOT_PRESENT) {
					//detail.setText("HANDLER RETURNED\nprovider not present");
					//                    Toast.makeText(mContext,"HANDLER RETURNED\nprovider not present",Toast.LENGTH_LONG);
					if (DEBUG) Log.v(LOC_DATA, "HANDLER RETURNED\nunable to get location");
					Location lastLocation = locationMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
					if (lastLocation != null){

						latitude = lastLocation.getLatitude();
						longitude = lastLocation.getLongitude();
						myLoc =new double[]{latitude,longitude};
						gotMyLoc = GET_MY_LOC_SUCCESS;
					}else{
						gotMyLoc = UNABLE;
					}


				}
				//gotMyLoc = null;
				//update the distance of the karung Guni from all the advertisements in the database
				HashMap<String, Double> distanceMap = new HashMap<String, Double>();
				Cursor advertisements = getContentResolver().query(AppData.Advertisements.CONTENT_URI,
						new String[]{AppData.Advertisements.COLUMN_NAME_OWNER}, null, null, null);
				for(advertisements.moveToFirst(); !advertisements.isAfterLast(); advertisements.moveToNext()) {
					// The Cursor is now set to the right position
					String owner = advertisements.getString(0);
					Double dist;
					if(distanceMap.containsKey(owner))
					{
						dist = distanceMap.get(owner);
					}
					else
					{
						Cursor seller = getContentResolver().query(AppData.Sellers.CONTENT_URI,
								new String[] {AppData.Sellers.COLUMN_NAME_ADDRESS_LAT, AppData.Sellers.COLUMN_NAME_ADDRESS_LONG}, 
								AppData.Sellers.COLUMN_NAME_EMAIL + " = \"" + owner + "\"", null, null);
						if (seller == null || seller.getCount() != 1) 
							continue;
						seller.moveToFirst();
						double[] location = new double[2];
						String sLat = seller.getString(seller.getColumnIndex(AppData.Sellers.COLUMN_NAME_ADDRESS_LAT));
						if(sLat.isEmpty())
							location[0] = 0.0;
						else
							location[0] = Double.parseDouble(sLat);
						String sLong = seller.getString(seller.getColumnIndex(AppData.Sellers.COLUMN_NAME_ADDRESS_LONG));
						if(sLong.isEmpty())
							location[1] = 0.0;
						else
							location[1] = Double.parseDouble(sLong); 
						dist = Double.valueOf(GeoUtil.calculateDistance(GetLocationWithGPS.myLoc, location));
						distanceMap.put(owner, dist);
					}
					ContentValues values = new ContentValues();
					values.put(AppData.Advertisements.COLUMN_NAME_DISTANCE, dist.toString());
					getContentResolver().update(AppData.Advertisements.CONTENT_URI, values, 
							AppData.Advertisements.COLUMN_NAME_OWNER + " = \"" + owner + "\"", null);
				}
				getContentResolver().notifyChange(AppData.Advertisements.CONTENT_URI, null);
			}
		};



		latitude = longitude = -1;
		if (!locationMgr.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
			AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
			builder.setTitle("GPS is not enabled")
			.setMessage("Would you like to go the location settings and enable GPS?").setCancelable(true)
			.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					startActivity(new Intent(Settings.ACTION_SECURITY_SETTINGS));
				}
			}).setNegativeButton("No", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					dialog.cancel();
					//finish();
				}
			});
			AlertDialog alert = builder.create();
			alert.show();
		} else {
			LocationHelper locationHelper = new LocationHelper(locationMgr, handler, KarungGuniActivity.LOG_TAG);
			locationHelper.getCurrentLocation(30);
		}



	}

	@Override
	public IBinder onBind(Intent intent) {
		return null;  //To change body of implemented methods use File | Settings | File Templates.
	}





}