General :: Android 2.2 - Applying Animation To SurfaceView

I'm working on a puzzle game for Android 2.2, what I want to do is a simple fade-in fade-out of the whole game screen, during level changing. I tried with an AlphaAnimation from 1.0f to 0.0f and vice-versa, and it works perfectly if I start it from a View, but if I try to start it from the SurfaceView which I used to write my game engine nothing happens.

I put a completely black ImageView on top of my surfaceview, and applied the animation to this imageView. This is my layout

Code:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="<not allowed to post external links...>"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"

[Code] ......