MapRenderer For Android in Xamarin.Forms

Hi, i want to customize the marker option for android.

I found this code for Android :

    // Getting GoogleMap object from the fragment
        googleMap = mapFragment.getMap();

        // Setting a custom info window adapter for the google map
         googleMap.setInfoWindowAdapter(new InfoWindowAdapter() {

        // Use default InfoWindow frame
        @Override
        public View getInfoWindow(Marker arg0) {
            return null;
        }

        // Defines the contents of the InfoWindow
        @Override
        public View getInfoContents(Marker arg0) {

            // Getting view from the layout file info_window_layout
            View v = getLayoutInflater().inflate(R.layout.info_window_layout, null);

            // Getting the position from the marker
            LatLng latLng = arg0.getPosition();

            // Getting reference to the TextView to set latitude
            TextView tvLat = (TextView) v.findViewById(R.id.tv_lat);

            // Getting reference to the TextView to set longitude
            TextView tvLng = (TextView) v.findViewById(R.id.tv_lng);

            // Setting the latitude
            tvLat.setText("Latitude:" + latLng.latitude);

            // Setting the longitude
            tvLng.setText("Longitude:"+ latLng.longitude);

            // Returning the view containing InfoWindow contents
            return v;

        }
    });

i want to do something like that.
How can i implement it?

Thanks