How do I replace my android app Google maps radius circle with a blue translucent one

How do I replace my android app Google maps radius circle with a blue translucent one as in image also blue marker with blue circle?

I can make the circle have a particular outline and fill but it doesn't look anywhere near as nice as the one depicted in the image below. How do I do that? my code so far is below also.

Code:

[code=java] private GoogleMap googleMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

try {
initilizeMap();

} catch (Exception e) {
e.printStackTrace();
}

}
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();


LatLng latLng = new LatLng(28.982518, -81.542272);
gooleMap.addMarker(new MarkerOptions().position(latLng));


Circle circle = gooleMap.addCircle(new CircleOptions()
.center(new LatLng(28.982518, -81.542272))
.radius(1000)
.strokeColor(Color.RED)
.fillColor(Color.PURPLE));

mMap.addCircle(new CircleOptions()
.center(center)
.radius(radius)
.strokeWidth(0f)
.fillColor(0x550000FF));

}
}

@Override
protected void onResume() {
super.onResume();
initilizeMap();
}
[/code]
}

Android xml:

[code=java] <?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>[/code]

Image:

http://i.stack.imgur.com/gx99C.jpg