title: Can not fetch Android SDK with Android Studio RC4 on Ubuntu
body: <p>I'm trying to start Android Studio RC4 on a freshly installed Ubuntu.
  I'm under a proxy so I have set my proxy in Ubuntu System Settings.</p>
  
  <p>Yet, I'm getting this when starting Android Studio:</p>
  
  <pre><code>[   6987]   WARN - ateSettings.impl.UpdateChecker - Connection failed. Please check your network connection and try again. 
  </code></pre>
  
  <p>and the process seems to hang up at "Fetching Android SDK".</p>
  
  <p>I've tried <code>export http_proxy=...</code> to no avail</p>