title: Cannot download system images in Android Studio 3.0 AVD Manager or SDK Manager
body: <p>When I try to list and download system images in AVD Manager, nothing shows up in the list. See below:<br>
  <a href="https://i.stack.imgur.com/Fgxcs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Fgxcs.png" alt="enter image description here"></a>
  None of the three tabs show the images, even after I hit refresh. I have made sure I have a working fast Internet connection.  I have checked the SDK Manager also. Nothing related to system images is there for download. My list of SDK update sites is as follows (<a href="https://dl.google.com/android/repository/repository2-1.xml" rel="nofollow noreferrer">https://dl.google.com/android/repository/repository2-1.xml</a> and a local repo on my system):<br>
  <a href="https://i.stack.imgur.com/E6lY8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/E6lY8.png" alt="enter image description here"></a></p>