title: Android dalvik problem
body: <p>Please i have different platforms installed. I just wanted to know what am supposed to do. If i develop with 3.0 platform, would those with a 2.2 be able to use my app??..</p>
  
  <p>The second question which is the main question is I always get this error when i create android projects..
  <code>[2011-05-16 16:32:21 - Hello World] Dx no classfiles specified
  [2011-05-16 16:32:21 - Hello World] Conversion to Dalvik format failed with error 1</code></p>
  
  <p>What do I do to it?</p>