How to effectively use Google Maps API V2(with MapFragment, Google Map, Marker etc) to an older app that uses API V1(with MapView, GeoPoint etc), -

i working on google map based project on 6 months. using google maps api v1 , developer api keys. while trying release app understood google api v1 got deprecated! when read google maps api v2, found mapview, geopoint, overlayitem replaced fragment, marker, mapfragment, google map etc.

my original xml looks this

<?xml version="1.0" encoding="utf-8"?>  <com.google.android.maps.mapview  xmlns:android="http://schemas.android.com/apk/res/android"         android:id="@+id/mapview"         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:clickable="true"         android:apikey="**************my old api key**************"/> 

now google not provide key, need add map, , show overlay items on same. notally confused new api.

my java file looks like

public class placesmapactivity extends mapactivity {     // nearest places     placeslist nearplaces;      // map view     mapview mapview;      // map overlay items     list<overlay> mapoverlays;      additemizedoverlay itemizedoverlay;       geopoint geopoint;     // map controllers     mapcontroller mc;      drawable defaultmarker;      double latitude;     double longitude;     overlayitem overlayitem;      string p_u_name;     place reference;          @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.map_places);          // getting intent data         intent = getintent();          reference = (place) i.getserializableextra("place_reference");          // users current geo location         string user_latitude = i.getstringextra("user_latitude");         string user_longitude = i.getstringextra("user_longitude");          // nearplaces list         nearplaces = (placeslist) i.getserializableextra("near_places");          mapview = (mapview) findviewbyid(r.id.mapview);         mapview.setbuiltinzoomcontrols(true);          mapoverlays = mapview.getoverlays();          // geopoint place on map         geopoint = new geopoint((int) (double.parsedouble(user_latitude) * 1e6),(int) (double.parsedouble(user_longitude) * 1e6));          // drawable marker icon         drawable drawable_user = this.getresources().getdrawable(r.drawable.mark_red);          itemizedoverlay = new additemizedoverlay(drawable_user, this);          // map overlay item         overlayitem = new overlayitem(geopoint, "your location","that you!");          itemizedoverlay.addoverlay(overlayitem);          mapoverlays.add(itemizedoverlay);         itemizedoverlay.populatenow();            drawable drawable = this.getresources().getdrawable(r.drawable.mark_blue);              itemizedoverlay = new additemizedoverlay(drawable, this);              mc = mapview.getcontroller();          // these values used map boundary area         // area can see markers on screen         int minlat = integer.max_value;         int minlong = integer.max_value;         int maxlat = integer.min_value;         int maxlong = integer.min_value;          // check null in case null         if (nearplaces.results != null) {                // loop through places             (place place : nearplaces.results) {                  latitude = place.geometry.location.lat; // latitude                 longitude = place.geometry.location.lng; // longitude                  // geopoint place on map                 geopoint = new geopoint((int) (latitude * 1e6),                         (int) (longitude * 1e6));                  // map overlay item                 overlayitem = new overlayitem(geopoint,"0",place.reference);                  itemizedoverlay.addoverlay(overlayitem);                  // calculating map boundary area                 minlat  = (int) math.min( geopoint.getlatitudee6(), minlat );                 minlong = (int) math.min( geopoint.getlongitudee6(), minlong);                 maxlat  = (int) math.max( geopoint.getlatitudee6(), maxlat );                 maxlong = (int) math.max( geopoint.getlongitudee6(), maxlong );             }             mapoverlays.add(itemizedoverlay);              // showing overlay items             itemizedoverlay.populatenow();         }           // adjusting zoom level can see markers on map         mapview.getcontroller().zoomtospan(math.abs( minlat - maxlat ), math.abs( minlong - maxlong ));         mapcontroller controller = mapview.getcontroller();         controller.setzoom(15);          // showing center of map         mc.animateto(new geopoint((maxlat + minlat)/2, (maxlong + minlong)/2 ));         mapview.postinvalidate();      }        @override     protected boolean isroutedisplayed() {         return false;     }  } 

i want know if there means use old code support google maps api v2?

the easiest way migrate v2 remove code have , write scratch.

android api v1 , v2 not map 1 1.

thank you