title: Dependent Add-on APK's
body: <p>Hello I am trying to build a separate Add-on to my own existing Android Application.</p>
  
  <p>I want this Add-on to be hidden on the android market if the user doesn't have the main app something like "uses-library". I tried using "uses-library" with my packagename of project 1 but the compiler simply says cannot install library does not exist! it is installed on the device. Do I have to add a shared library to the first projects manifest aswell? or am I completely off target!</p>
  
  <p>Astro does this kind of thing with its pro, bluetooth and network modules.</p>
  
  <p>Thank you</p>