Simplest way to animate button
<p>I have to code animated menu buttons for my Android app. It will be look something like this:
![enter image description here][1]</p>

<ul>
<li>simple mockup of menu: i.stack.imgur.com/vT788.png</li>
<li>Animation looks like some kind of cube rotation - one spin of cube, something like that..</li>
</ul>

<p>I'm looking simplest way to program animation for menu buttons (for example "button1"). By on click it have to do animation first, then show content of submenu. "button1" have to be animated by four *.png file:</p>

<ul>
<li>button1.png</li>
<li>button1_step1.png</li>
<li>button1_step2.png</li>
<li>button1_step3.png</li>
</ul>

<p>Anyone know a siple way to code this?
Thank's in advance ;-)</p>
