title: Android - how to tell/set which API Level is targeted
body: <p>well..kind of new to Android, using ant to build something I downloaded. </p>
  
  <p>how can I tell which API level is target ? I saw nothing about it in the build.xml file ..</p>
  
  <p>when I try to use classes from API Level 8, I am getting symbol not found errors..</p>
  
  <p>thanks</p>