title: How to downgrade my android app from 2.2 to 1.5 sdk seamlessly
body: <p>I have an android app which I started write on sdk 2.2, but my android phone has the 1.5 version of the android.  I have to downgrade my app to 1.5 seamlessly.  I am not fully sure but I didn't use too many 2.2-specific features.  Can you tell me how to do it?</p>