To update Google MAP V2:
Open the Android SDK Manager -> Go to Advanced Features -> Check for an update to Google Play Services . if it does not show an available update, go to "Packages-> Reboot". upgrade your Google play service to version 5 .
After that, delete the old Google Play Services Library project from the Eclipse workspace. import it again. add this library project to your current project. now u will have the Circle class available in the com.google.android.gms.maps.model package. and you can use this to add a circle to your map.
Add circle :
mMap.addCircle(new CircleOptions() .center(new LatLng(location.getLatitude(), location.getLongitude())) .radius(100) .strokeColor(Color.RED) .fillColor(Color.BLUE));
And for your information, this is the February 2013 Release Notes .
EDIT: These are June 2016 release notes. Now you can make the circles round, which can be useful if you want to do some kind of action with the circle.
Kunalk
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