Getting start Google Maps in Android

Google maps is very popular in these days. So most of mobile apps use Google maps to server their customers. In this tutorial I’m going to demonstrate how to use Google maps for your android app using Google service

 1)   Step is to add Google play serves to your android adt bundle.

Open Eclipse ⇒ Windows ⇒ Android SDK Manager

 Go to Android SDK Manager and click and check you have Google play serves with your adt bundle. If not you have to download it.

2)   Like that way you have to check your adt bundle contain

To check you have to select Obsolete  tick on your android sdk manager window . If not you have to install that also

 If you done now your ready to get privet key from Google services to your android application.

3)   Then go to the place where java install in your computer.

Program Files (x86)\Java\jre7\bin

Then “shift+right click” and open command prompt 

Then type like this

keytool -list -v -keystore "%USERPROFILE%\.android\debug.keystore" -alias androiddebugkey -storepass android -keypass android

then you have to copy the SHA1 that your prompt from the cmd.

4)   Go to this link https://code.google.com/apis/console/

5) Then go to the API & AUTH -> APIs and on the Google Maps Android API v2 and Translate API

6)   Then goto

APIs & auth -> Credentials -> public api access ->create new key -> android key

7)Then enter your SHA1 key ; android project name

After you completing typing click the create button

Then google provide a api key  

Copy the API Key. Late you need that.

8) then Create a work place for the project

In Eclipse goto File ⇒ Import ⇒ Android ⇒ Existing Android Code Into Workspace

9. Click on Browse and select Google Play Services project from your android sdk folder. You can locate play services library project from
android-sdk-windows\extras\google\google_play_services\libproject\google-play-services_lib

10. Importantly while importing check Copy projects into workspace option as shown in the below image.

11. In Eclipse create a new project by going to File ⇒ New ⇒ Android Application Project and fill required details. I kept my project name as Google Maps V2 and package name

12. Now we need to use Google Play Services project as a library to use project. So right click on project and select properties. In the properties window on left side select Android. On the right you can see Add button under library section. Click it and select google play services project which we imported previously.

 13)

14)

15)at last your workplace is display like this.

16) Then you need to give permission in manifest file

<!-- Goolge API Key -->

        <meta-data

            android:name="com.google.android.maps.v2.API_KEY"

            android:value="AIzaSyAo7D5KmWcB8hdw6QZ_GNz5BSDLejlv6m0" />

<--add your api here as android:value -->

      

        <meta-data

            android:name="com.google.android.gms.version"

            android:value="@integer/google_play_services_version" />

<!-- Required OpenGL ES 2.0. for Maps V2 -->

    <uses-feature

        android:glEsVersion="0x00020000"

        android:required="true" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

    <uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

17)Setup map

New google maps are implemented using MapFragments which is a sub class of Fragmentsclass. Open your main activity layout file activity_main.xml file and add following code. I usedRelativeLayout as a parent element. You can remove it and use MapFragment directly.

XML

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent" >     <fragment         android:id="@+id/map"         android:name="com.google.android.gms.maps.MapFragment"         android:layout_width="match_parent"         android:layout_height="match_parent"/> </RelativeLayout>

JAVA CODE

MainActivity.java

public class MainActivity extends Activity {     // Google Map     private GoogleMap googleMap;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         try {             // Loading map             initilizeMap();         } catch (Exception e) {             e.printStackTrace();         }     }     /**      * function to load map. If map is not created it will create it for you      * */     private void initilizeMap() {         if (googleMap == null) {             googleMap = ((MapFragment) getFragmentManager().findFragmentById(                     R.id.map)).getMap();             // check if map is created successfully or not             if (googleMap == null) {                 Toast.makeText(getApplicationContext(),                         "Sorry! unable to create maps", Toast.LENGTH_SHORT)                         .show();             }         }     }     @Override     protected void onResume() {         super.onResume();         initilizeMap();     } }

MAP Properties

Showing Current Location

You can show user’s current location on the map by calling setMyLocationEnabled(). Pass true / false to enable or disable this feature

googleMap.setMyLocationEnabled(true); // false to disable

Zooming Buttons

You can call setZoomControlsEnabled() function to get rid of those zooming controls on the map. By disabling these buttons map zooming functionality still work by pinching gesture.

googleMap.getUiSettings().setZoomControlsEnabled(false); // true to enable

Zooming Functionality

You can disable zooming gesture functionality by calling setZoomGesturesEnabled()

googleMap.getUiSettings().setZoomGesturesEnabled(false);

Compass Functionality

Compass can be disabled by calling setCompassEnabled() function

googleMap.getUiSettings().setCompassEnabled(true);

My Location Button

My location button will be used to move map to your current location. This button can be shown / hidden by calling setMyLocationButtonEnabled() function

googleMap.getUiSettings().setMyLocationButtonEnabled(true);

Map Rotate Gesture

My rotate gesture can be enabled or disabled by calling setRotateGesturesEnabled() method

googleMap.getUiSettings().setRotateGesturesEnabled(true);

Although google maps provides lot of other features, I covered only basic topics in this tutorial. Remaining topics seems to be pretty much lengthy, so I’ll post them as separate articles.

Changing Map Type

Google provides 4 kinds of map types Normal, Hybrid, Satellite and Terrain. You can toggle to any kind of map using googleMap.setMapType() method.

googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE); googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN); googleMap.setMapType(GoogleMap.MAP_TYPE_NONE);

Custom Marker Icon

Apart from maps native marker icons, you can use own image to show as a marker. You can load the icon from any kind of supported sources.

fromAsset(String assetName) – Loading from assets folder
fromBitmap (Bitmap image) – Loading bitmap image
fromFile (String path) – Loading from file
fromResource (int resourceId) – Loading from drawable resource

// latitude and longitude double latitude = 17.385044; double longitude = 78.486671; // create marker MarkerOptions marker = new MarkerOptions().position(new LatLng(latitude, longitude)).title("Hello Maps"); // Changing marker icon marker.icon(BitmapDescriptorFactory.fromResource(R.drawable.my_marker_icon))); // adding marker googleMap.addMarker(marker);

Moving Camera to a Location with animation

You may want to move camera to a particular position. Google maps provides set of functions to achieve this.

CameraPosition cameraPosition = new CameraPosition.Builder().target(                 new LatLng(17.385044, 78.486671)).zoom(12).build(); googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

Following are enhancements and features that google maps provides. You can utilize these features which suites to your requirements.

Changing Marker Color

By default map marker color will be RED. Google maps provides some set of predefined colored icons for the marker.

// ROSE color icon marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE)); // GREEN color icon marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));

Placing a Marker

You can place a marker on the map by using following code.

// latitude and longitude double latitude = ; double longitude = ; // create marker MarkerOptions marker = new MarkerOptions().position(new LatLng(latitude, longitude)).title("Hello Maps "); // adding marker googleMap.addMarker(marker);

Create Application to get current location & draw the shortest path for the provided location from the current location

For this first we have to create two java class call GPSTracker and GMapV2Direction

GMapV2Direction java class

import java.io.InputStream;

import java.util.ArrayList;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.protocol.BasicHttpContext;

import org.apache.http.protocol.HttpContext;

import org.w3c.dom.Document;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import com.google.android.gms.maps.model.LatLng;

import android.util.Log;

public class GMapV2Direction {

       

      public final static String MODE_DRIVING = "driving";

      public final static String MODE_WALKING = "walking";

     

      public GMapV2Direction() { }

     

     

      public Document getDocument(LatLng start, LatLng end, String mode) {

            String url = "http://maps.googleapis.com/maps/api/directions/xml?"

                  + "origin=" + start.latitude + "," + start.longitude 

                  + "&destination=" + end.latitude + "," + end.longitude

                  + "&sensor=false&units=metric&mode=driving";

           

            Log.d("GoogleMapsDirection", url);

        try {

           

            HttpClient httpClient = new DefaultHttpClient();

           

            HttpContext localContext = new BasicHttpContext();

           

            HttpPost httpPost = new HttpPost(url);

           

           

            //execute in  request in http cilent

            System.out.println("a"+httpPost);

            System.out.println("b"+localContext);

            HttpResponse response = httpClient.execute(httpPost, localContext);

           

            //sent or received http msg

           

            InputStream in = response.getEntity().getContent();

            System.out.println("c"+in);

            //enables application to obtain paser that produse DOM object tree from XML

            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();

            System.out.println("d"+builder);

            Document doc = builder.parse(in);

            System.out.println("e"+doc);

            return doc;

        } catch (Exception e) {

            e.printStackTrace();

        }

            return null;

      }

     

      public String getDurationText (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("duration");

        Node node1 = nl1.item(nl1.getLength() - 1);

        NodeList nl2 = node1.getChildNodes();

        Node node2 = nl2.item(getNodeIndex(nl2, "text"));

       

        Log.i("DurationText", node2.getTextContent());

            return node2.getTextContent();

      }

     

      public int getDurationValue (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("duration");

        Node node1 = nl1.item(nl1.getLength() - 1);

        NodeList nl2 = node1.getChildNodes();

        Node node2 = nl2.item(getNodeIndex(nl2, "value"));

        Log.i("DurationValue", node2.getTextContent());

            return Integer.parseInt(node2.getTextContent());

      }

     

      public String getDistanceText (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("distance");

        Node node1 = nl1.item(nl1.getLength() - 1);

        NodeList nl2 = node1.getChildNodes();

        Node node2 = nl2.item(getNodeIndex(nl2, "text"));

        Log.i("DistanceText", node2.getTextContent());

            return node2.getTextContent();

      }

     

      public int getDistanceValue (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("distance");

        Node node1 = nl1.item(nl1.getLength() - 1);

        NodeList nl2 = node1.getChildNodes();

        Node node2 = nl2.item(getNodeIndex(nl2, "value"));

        Log.i("DistanceValue", node2.getTextContent());

            return Integer.parseInt(node2.getTextContent());

      }

     

      public String getStartAddress (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("start_address");

        Node node1 = nl1.item(0);

        Log.i("StartAddress", node1.getTextContent());

            return node1.getTextContent();

      }

     

      public String getEndAddress (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("end_address");

        Node node1 = nl1.item(0);

        Log.i("StartAddress", node1.getTextContent());

            return node1.getTextContent();

      }

     

      public String getCopyRights (Document doc) {

            NodeList nl1 = doc.getElementsByTagName("copyrights");

        Node node1 = nl1.item(0);

        Log.i("CopyRights", node1.getTextContent());

            return node1.getTextContent();

      }

     

      //decode the received String in http mssage to geopints

                  //Google provides the routing results as an encoded polylines format

      public ArrayList<LatLng> getDirection (Document doc) {

            NodeList nl1, nl2, nl3;

        ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>();

        nl1 = doc.getElementsByTagName("step");

        if (nl1.getLength() > 0) {

            for (int i = 0; i < nl1.getLength(); i++) {

                Node node1 = nl1.item(i);

                nl2 = node1.getChildNodes();

                Node locationNode = nl2.item(getNodeIndex(nl2, "start_location"));

                nl3 = locationNode.getChildNodes();

                Node latNode = nl3.item(getNodeIndex(nl3, "lat"));

                double lat = Double.parseDouble(latNode.getTextContent());

                Node lngNode = nl3.item(getNodeIndex(nl3, "lng"));

                double lng = Double.parseDouble(lngNode.getTextContent());

                listGeopoints.add(new LatLng(lat, lng));

                locationNode = nl2.item(getNodeIndex(nl2, "polyline"));

                nl3 = locationNode.getChildNodes();

                latNode = nl3.item(getNodeIndex(nl3, "points"));

                ArrayList<LatLng> arr = decodePoly(latNode.getTextContent());

                for(int j = 0 ; j < arr.size() ; j++) {

                  listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude));

                }

                locationNode = nl2.item(getNodeIndex(nl2, "end_location"));

                nl3 = locationNode.getChildNodes();

                latNode = nl3.item(getNodeIndex(nl3, "lat"));

                lat = Double.parseDouble(latNode.getTextContent());

                lngNode = nl3.item(getNodeIndex(nl3, "lng"));

                lng = Double.parseDouble(lngNode.getTextContent());

                listGeopoints.add(new LatLng(lat, lng));

            }

        }

       

        return listGeopoints;

      }

     

      private int getNodeIndex(NodeList nl, String nodename) {

            for(int i = 0 ; i < nl.getLength() ; i++) {

                  if(nl.item(i).getNodeName().equals(nodename))

                        return i;

            }

            return -1;

      }

     

      private ArrayList<LatLng> decodePoly(String encoded) {

            ArrayList<LatLng> poly = new ArrayList<LatLng>();

            int index = 0, len = encoded.length();

            int lat = 0, lng = 0;

            while (index < len) {

                  int b, shift = 0, result = 0;

                  do {

                        b = encoded.charAt(index++) - 63;

                        result |= (b & 0x1f) << shift;

                        shift += 5;

                  } while (b >= 0x20);

                  int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));

                  lat += dlat;

                  shift = 0;

                  result = 0;

                  do {

                        b = encoded.charAt(index++) - 63;

                        result |= (b & 0x1f) << shift;

                        shift += 5;

                  } while (b >= 0x20);

                  int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));

                  lng += dlng;

                 

                  LatLng position = new LatLng((double) lat / 1E5, (double) lng / 1E5);

                  poly.add(position);

            }

            return poly;

      }

}

GPSTracker java class

package com.ISURU.testmapper;

import android.app.AlertDialog;

import android.app.Service;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.location.Location;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os.Bundle;

import android.os.IBinder;

import android.provider.Settings;

import android.util.Log;

public class GPSTracker extends Service implements LocationListener {

      private final Context mContext;

      // flag for GPS status

      boolean isGPSEnabled = false;

      // flag for network status

      boolean isNetworkEnabled = false;

      // flag for GPS status

      boolean canGetLocation = false;

      Location location; // location

      double latitude; // latitude

      double longitude; // longitude

      // The minimum distance to change Updates in meters

      private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

      // The minimum time between updates in milliseconds

      private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

      // Declaring a Location Manager

      protected LocationManager locationManager;

      public GPSTracker(Context context) {

            this.mContext = context;

            getLocation();

      }

      public Location getLocation() {

            try {

                  locationManager = (LocationManager) mContext

                              .getSystemService(LOCATION_SERVICE);

                  // getting GPS status(name of loaction provider'gps'(constant))

                  isGPSEnabled = locationManager

                              .isProviderEnabled(LocationManager.GPS_PROVIDER);

                  // getting network status

                  isNetworkEnabled = locationManager

                              .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

                  if (!isGPSEnabled && !isNetworkEnabled) {

                        // no network provider is enabled

                  }

                  else {

                        this.canGetLocation = true;

                        if (isNetworkEnabled) {

                              locationManager.requestLocationUpdates(

                                          LocationManager.NETWORK_PROVIDER,

                                          MIN_TIME_BW_UPDATES,

                                          MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                              Log.d("Network", "Network");

                              if (locationManager != null) {

                                    location = locationManager

                                                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                                    if (location != null) {

                                          latitude = location.getLatitude();

                                          longitude = location.getLongitude();

                                    }

                              }

                        }

                        // if GPS Enabled get lat/long using GPS Services

                        if (isGPSEnabled) {

                              if (location == null) {

                                    locationManager.requestLocationUpdates(

                                                LocationManager.GPS_PROVIDER,

                                                MIN_TIME_BW_UPDATES,

                                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                                    Log.d("GPS Enabled", "GPS Enabled");

                                    if (locationManager != null) {

                                          location = locationManager

                                                      .getLastKnownLocation(LocationManager.GPS_PROVIDER);

                                          if (location != null) {

                                                latitude = location.getLatitude();

                                                longitude = location.getLongitude();

                                          }

                                    }

                              }

                        }

                  }

            } catch (Exception e) {

                  e.printStackTrace();

            }

            return location;

      }

     

      //what to do when no gps

      public void stopUsingGPS(){

            if(locationManager != null){

                  locationManager.removeUpdates(GPSTracker.this);

            }          

      }

     

     

      public double getLatitude(){

            if(location != null){

                  latitude = location.getLatitude();

            }

           

            // return latitude

            return latitude;

      }

     

     

      public double getLongitude(){

            if(location != null){

                  longitude = location.getLongitude();

            }

           

            // return longitude

            return longitude;

      }

     

      //find gps N wifi anable

      public boolean canGetLocation() {

            return this.canGetLocation;

      }

     

      //show alerts

      public void showSettingsAlert(){

            AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

       

        // Setting Dialog Title

        alertDialog.setTitle("GPS is settings");

        // Setting Dialog Message

        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

        // On pressing Settings button

        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog,int which) {

                  Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);

                  //acsess to the settings option

                  mContext.startActivity(intent);

            }

        });

        // on pressing cancel button

        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {

            dialog.cancel();

            }

        });

        // Showing Alert Message

        alertDialog.show();

      }

      @Override

      public void onLocationChanged(Location location) {

      }

      @Override

      public void onProviderDisabled(String provider) {

      }

      @Override

      public void onProviderEnabled(String provider) {

      }

      @Override

      public void onStatusChanged(String provider, int status, Bundle extras) {

      }

      @Override

      public IBinder onBind(Intent arg0) {

            return null;

      }

}

Then we want to create the UI with one fragment for load the map and two buttons to get the location and draw the path

XML File

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

   

<fragment

    android:id="@+id/map"

    android:name="com.google.android.gms.maps.MapFragment"

    android:layout_width="match_parent"

    android:layout_height="354dp"

    android:layout_above="@+id/editText1"

    android:layout_alignParentTop="true"

    android:layout_x="-2dp"

    android:layout_y="1dp" />

<Button

    android:id="@+id/button2"

    android:layout_width="162dp"

    android:layout_height="wrap_content"

    android:layout_alignParentBottom="true"

    android:layout_alignParentRight="true"

    android:text="Draw Location" />

<Button

    android:id="@+id/button1"

    android:layout_width="161dp"

    android:layout_height="wrap_content"

    android:layout_alignParentBottom="true"

    android:layout_alignParentLeft="true"

    android:text="Get Location" />

<EditText

    android:id="@+id/editText1"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_above="@+id/button2"

    android:layout_alignParentLeft="true"

    android:ems="10" />

   

</RelativeLayout>

Then the java file

package com.ISURU.testmapper;

import android.app.Activity;

import android.os.Bundle;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URI;

import java.net.URL;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.GregorianCalendar;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.protocol.BasicHttpContext;

import org.apache.http.protocol.HttpContext;

import org.json.JSONArray;

import org.json.JSONObject;

import org.w3c.dom.Document;

import com.google.android.gms.internal.in;

import com.google.android.gms.maps.CameraUpdateFactory;

import com.google.android.gms.maps.GoogleMap;

import com.google.android.gms.maps.MapFragment;

import com.google.android.gms.maps.model.LatLng;

import com.google.android.gms.maps.model.MarkerOptions;

import com.google.android.gms.maps.model.PolylineOptions;

import android.annotation.TargetApi;

import android.content.Intent;

import android.graphics.Color;

import android.location.Criteria;

import android.location.Location;

import android.location.LocationManager;

import android.os.AsyncTask;

import android.os.Build;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class GetLocation extends Activity{

     

      private GoogleMap googleMap;

      MarkerOptions markerOptions;

      LatLng fromlatlng;

      private Double latitude1;

      private Double longitude1;

      private BufferedReader in;

      LatLng toPosition ;

      EditText destination;

     

     

      public static double longt;

      public static double lati;

     

      // GPSTracker class

      GPSTracker gps;

      GoogleMap mMap;

    GMapV2Direction md;

    Button getloc,drawloc;

    LatLng fromPosition ;

     

    private class DoAsyncTask extends AsyncTask<URL, Integer, Long> {///Constructor

            String lat,lon,temp;

            String locName=destination.getText().toString();

           

            protected Long doInBackground(URL... params) {//callbackmethod

     

     

            // TODO Auto-generated method stub

            String addressUrl = "http://maps.googleapis.com/maps/api/geocode/json?address="

                            + locName

                            + "&sensor=true";

            try {

                 

                        HttpClient httpClient = new DefaultHttpClient();// Client

                        HttpGet getRequest = new HttpGet();

                        getRequest.setURI(new URI(addressUrl));

                        // HttpPost postRequest = new HttpPost();

                        // postRequest.setURI(new URI(url));

                        HttpResponse response = httpClient.execute(getRequest);

                        in = new BufferedReader(new InputStreamReader(response

                                .getEntity().getContent()));

                        StringBuffer sb = new StringBuffer("");

                        String line = "";

                        String NL = System.getProperty("line.separator");

                        while ((line = in.readLine()) != null) {

                            sb.append(line + NL);

                        }

                        in.close();

                        String page = sb.toString();

                       

                        //mylon.setText(page);

                        JSONObject jsonObject = new JSONObject(page);

                        if (jsonObject.has("results")) {

                            JSONArray jsonArray = (JSONArray) jsonObject.get("results");

                            //mylon.setText(locName);

                            if (jsonArray.length() > 0) {

                                jsonObject = (JSONObject) jsonArray.get(0);

                                if (jsonObject.has("geometry")) {

                                    jsonObject = (JSONObject) jsonObject

                                            .get("geometry");

                                    if (jsonObject.has("location")) {

                                        JSONObject location = (JSONObject) jsonObject

                                                .get("location");

                                        latitude1 = (Double) location.get("lat");

                                        longitude1 = (Double) location.get("lng");

                                                                                  

                                    }

                                }

                            }

                        }

                    } catch (Exception e) {

                        e.printStackTrace();

                     

                    } finally {

                        if (in != null) {

                            try {

                                in.close();

                            } catch (IOException e) {

                                e.printStackTrace();

                            }

                        }

                    }

            return null;

      }

      @Override

            protected void onPostExecute(Long result) {

            // TODO Auto-generated method stub

           

            //interact with gui only here#######################################

            Log.e(locName,latitude1+""+longitude1);

            toPosition = new LatLng(latitude1,longitude1);

            Log.e("to",""+toPosition);

           

            draw();

      }

      @Override

            protected void onPreExecute() {

           

            // TODO Auto-generated method stub

                       

            locName=destination.getText().toString();

                  Log.e("Name", locName);

      }

    

}    

     

    public Document getDocument(LatLng start, LatLng end, String mode) {

     

            String url = "http://maps.googleapis.com/maps/api/directions/xml?"

                  + "origin=" + start.latitude + "," + start.longitude 

                  + "&destination=" + end.latitude + "," + end.longitude

                  + "&sensor=false&units=metric&mode=driving";

           

            Log.d("GoogleMapsDirection", url);

        try {

           

            HttpClient httpClient = new DefaultHttpClient();

           

            HttpContext localContext = new BasicHttpContext();

           

            HttpPost httpPost = new HttpPost(url);

           

           

            //execute in  request in http cilent

            Log.d("httpPost", url);

            Log.d("localContext",""+ localContext);

            HttpResponse response = httpClient.execute(httpPost, localContext);

            Log.d("response",""+ response);

            //sent or received http msg

           

            InputStream in = response.getEntity().getContent();

            Log.d("in",""+ in);

            //enables application to obtain paser that produse DOM object tree from XML

            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();

          

            Log.d("builder",""+ builder);

            Document doc = builder.parse(in);

          

            Log.d("doc",""+ doc);

            return doc;

        } catch (Exception e) {

            e.printStackTrace();

        }

            return null;

      }

     

    public void draw()

      {

      Log.e("from",""+fromPosition);

      Log.e("to",""+toPosition);

            mMap.addMarker(new MarkerOptions().position(fromPosition).title("Start"));

            mMap.addMarker(new MarkerOptions().position(toPosition).title("End"));

           

            //Document doc = md.getDocument(fromPosition, toPosition, GMapV2Direction.MODE_DRIVING);

            Document doc = getDocument(fromPosition, toPosition, GMapV2Direction.MODE_DRIVING);

            Log.e("md",""+md);

            Log.e("mMap",""+mMap);

            Log.e("doc",""+doc);

            ArrayList<LatLng> directionPoint = md.getDirection(doc);

            PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED);

           

            for(int i = 0 ; i < directionPoint.size() ; i++) {               

                  rectLine.add(directionPoint.get(i));

                  //directionPoint the array returned by the decodePoly method are stored

            }

           

            mMap.addPolyline(rectLine);

      }

     

   

      @TargetApi(Build.VERSION_CODES.HONEYCOMB)

      protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.getlocation);

       

        getloc=(Button)findViewById(R.id.button1);

            drawloc=(Button)findViewById(R.id.button2);

            destination = (EditText)findViewById(R.id.editText1);

            Log.e("i'm look ing @2","ggggggggg");

             md = new GMapV2Direction();

             //load the default map to web view

                  mMap = ((MapFragment)getFragmentManager().findFragmentById(

                    R.id.map)).getMap();

        

                  getloc.setOnClickListener(new View.OnClickListener() {

                       

                        @Override

                        public void onClick(View v) {

                              // TODO Auto-generated method stub

                              // create class object 

                          gps = new GPSTracker(GetLocation.this);

                              // check if GPS enabled      

                          if(gps.canGetLocation()){

                             

                              double latitude = gps.getLatitude();

                              double longitude = gps.getLongitude();

                             

                              longt = longitude;

                              lati = latitude;

                              Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();   

                             

                             

                              fromPosition=new LatLng(latitude,longitude);

                                mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(fromPosition, 16));

                              mMap.setMyLocationEnabled(true);

                          }else{

                             

                              gps.showSettingsAlert();

                          }

                             

                        }

                  });

                   

                             

                  drawloc.setOnClickListener(new View.OnClickListener() {

                       

                        @Override

                        public void onClick(View v) {

                              // TODO Auto-generated method stub

                              new DoAsyncTask().execute();

                        }

                  });

                 

       

      }

}