title: The project was not built since its build path is incomplete
body: <p>Every time I try to import a project downloaded from <em>googlecode</em> into Eclipse but I get some errors:</p>
  
  <blockquote>
    <p>The project was not built since its build path is incomplete. Cannot
    find the class file for java.lang.Object. Fix the build path then try
    building this project </p>
    
    <p>Unable to resolve target 'android-10' (this changes from 1 to 15)</p>
  </blockquote>
  
  <p>I've already checked the other answers on the site but no solution worked. </p>
  
  <p>In </p>
  
  <blockquote>
    <p>Properties -> Java Build Path -> Libraries</p>
  </blockquote>
  
  <p>there's 1 item:</p>
  
  <blockquote>
    <p>Unable to get system libraries for the project</p>
  </blockquote>