android how to draw a circle on google map

Question

I am using the new API(Google Map API V2) for my android application, i have done creating the map and adding markers to it, now my task is to manually create a circle around any of the marker and also i want to provide a functionality to the user that he can increase the radius of that circle accordingly, for this i have given a bar, when user increases that bar the radius of circle will increase and vice versa.

If anybody knows how to do this using Google Map API V2 then please help,

Answer 1

try this code

protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_tag_map);

     // Drawing circle on the map
           drawCircle(new LatLng(Latitude, Longitude));
    }

        private void drawCircle(LatLng point){

                // Instantiating CircleOptions to draw a circle around the marker
                CircleOptions circleOptions = new CircleOptions();

                // Specifying the center of the circle
                circleOptions.center(point);

                // Radius of the circle
                circleOptions.radius(20);

                // Border color of the circle
                circleOptions.strokeColor(Color.BLACK);

                // Fill color of the circle
                circleOptions.fillColor(0x30ff0000);

                // Border width of the circle
                circleOptions.strokeWidth(2);

                // Adding the circle to the GoogleMap
                googleMap.addCircle(circleOptions);

            }