title: Android Set up Question - Which API Level do I Install?
body: <p>I'm trying to set up the Android SDK on Ubuntu.  Someday I want to make apps that can reach most of the market.</p>
  
  <p>I've heard I need to make the apps compatible with Android 1.6 for this.  Does that mean everything I install should be for Android 1.6 (API level 4?).  Will I have any trouble running the apps on my phone with is Android 2.1?</p>