How to version Android app in Eclipse?
<p>I would like to know how Android app versioning is done when creating apps with Eclipse.</p>

<p>Now I've completed my first working application and would like to develop it further. But I dont want to mess with code of a working application until improved application will be in working condition. Now I can open up new project and copy/paste all code+resources, but it will have different package name (because of duplicating variables) and as I know same Market app should be within same package.</p>

<p>How is this done and what tools are needed?</p>
