title: Facebook SDK in Android Studios not working?
body: <p>Trying to import Facebook <code>SDK</code> into Android Studios, getting the following error:</p>
  
  <pre><code> Error:(8, 0) Could not find property 'ANDROID_BUILD_SDK_VERSION' on project ':FriendPickerSample'.
  </code></pre>
  
  <p>I tried importing the modules as follows: <strong><code>File &gt; Import Module &gt; Facebook unzipped path.</code></strong></p>
  
  <p>I'm new to Android Studios and it's my first time trying to import any SDK, and I don't even know what 
  <code>'FriendPickerSample'</code> is (I've tried searching around internet!).</p>
  
  <p>Can someone please help me? What am I doing wrong, how can I solve this error?</p>
  
  <p><strong>UPDATE</strong>: I've tried adding BUILD_SDK_VERSION=20 (my sdk version is actually 20), still doesn't solve the error:</p>
  
  <p><img src="https://i.stack.imgur.com/Vobv4.jpg" alt="enter image description here"></p>