HTTP in doInBackground of AsyncTask

gistfile1.txt

package com.runningbus.put;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.TextView;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;


public class MainActivity extends FragmentActivity {

	private GoogleMap mMap;
	private TextView lat, lng;
	private ConnectivityManager connMgr;
	private NetworkInfo networkInfo;
	private LocationManager manager;
	private LocationListener listener;
	private HttpClient httpClient;
	private HttpPut httpPut;
	private JSONObject pairs;
	private double latitude, longitude;
	private Location busLocation;

    private static final String GPS = "http://protected-brushlands-3658.herokuapp.com/locations/1";
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initializeVariables();
        initializeMap();
        initializeMapUtils();
        mMap.setMyLocationEnabled(true);
        
       
        manager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);    	
        listener = new LocationListener() {

			@Override
			public void onLocationChanged(Location location) {
				// TODO Auto-generated method stub
				 mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 16));
		         mMap.addMarker(new MarkerOptions().position(new LatLng(location.getLatitude(), location.getLongitude())));
		         lat.setText("" + location.getLatitude());
		         lng.setText("" + location.getLongitude());
		         busLocation = location;
		         new PutData().execute(GPS);
			}

			@Override
			public void onStatusChanged(String provider, int status,
					Bundle extras) {
				// TODO Auto-generated method stub
				
			}

			@Override
			public void onProviderEnabled(String provider) {
				// TODO Auto-generated method stub
				
			}

			@Override
			public void onProviderDisabled(String provider) {
				// TODO Auto-generated method stub
				
			} 	
        };
    }

    @Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		manager.removeUpdates(listener);
	}

	@Override
    protected void onResume() {
        super.onResume();
        initializeMap();
        manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
    }
    
    private void initializeVariables() {
    	lat = (TextView) findViewById(R.id.tvLatitude);
        lng = (TextView) findViewById(R.id.tvLongtitude);
        
        connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        networkInfo = connMgr.getActiveNetworkInfo();
        
        pairs = new JSONObject();
    }
    
    private void initializeMapUtils() {
    	// Enable / Disable zooming controls
        mMap.getUiSettings().setZoomControlsEnabled(true);
        // Enable / Disable Compass icon
        mMap.getUiSettings().setCompassEnabled(true);
        // Enable / Disable Rotate gesture
        mMap.getUiSettings().setRotateGesturesEnabled(true);
        // Enable / Disable zooming functionality
        mMap.getUiSettings().setZoomGesturesEnabled(true);
        
    }
    
    private void initializeMap() {
        
    	if (mMap != null) 
            return;
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
    }
    
    private class PutData extends AsyncTask<String, Void, Void> {
    	//Location busLocation;
    	
		@Override
		protected Void doInBackground(String... params) {
			// TODO Auto-generated method stub

			try {
				httpClient = new DefaultHttpClient();
				httpPut = new HttpPut(params[0]);
				pairs.put("id", "1");
				pairs.put("lat", "" + busLocation.getLatitude());
				pairs.put("lng", "" + busLocation.getLongitude());
			
				httpPut.setEntity(new StringEntity(pairs.toString()));
				
				Log.d("JSON", pairs.toString());
			    HttpResponse response = httpClient.execute(httpPut);
			    Log.d("CODE", response.getStatusLine().getStatusCode() + "");
				
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (ClientProtocolException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return null;
			
		}
    }
}