Android - 4.0 is out, which version to use?
<p>I'm just starting to learn Android development and writing my first app. I started with V2.2 but up until now mostly wrote generic Java code. Now that I started to write Android specific code I saw that a new version was out. 
After installing it, eclipse IDE lets me choose between v2.1 and v4.0. non of the others are available.</p>

<p>So should I jump to 4.0 or stay with 2.1 to have the app compatible with a greater number of older handhelds? I'm not planning on using any new technology / functionality that 4.0 might be offering.</p>
