title: Android Studio Resolve error. failed to find target android-18
body: <p><img src="https://i.stack.imgur.com/04gmd.png" alt="Error image"></p>
  
  <p>Hello guys, Now I'm face on some error using android studio(0.3.6 version) (using at win8)</p>
  
  <p>I cloned project from bitbucket and import project, but that error message occured.</p>
  
  <p>what should I do?</p>
  
  <p>ah! Project make from android studio version 0.3.2. is this reason?</p>
  
  <p>In addition, how can I import external library at 0.3.6 project structure?
  should I make new module? then what?</p>
  
  <p>anyway! thanks in advance. I hope to get answer!</p>