title: This Android SDK requires Android Developer Toolkit version 21.0.0 or above
body: <p>(envirnment: Windows 7
               Eclipse
  )</p>
  
  <p>When I update in Android SDK Manager, I have selected all SDKs, platforms, samples and so on. After restart Eclipse, when I try to access Android SDK Manager, I got this message:
  <strong>Location of the android sdk has not been setup in the preferences</strong>
  !</p>
  
  <p>When I tried to locate SDK in Window->preference->Android,
   I got This warning:
  <strong>This Android SDK requires Android Developer Toolkit version 21.0.0 or above.  Current version is 20.0.3.v201208082019-427395.  Please update ADT to the latest version.</strong>
  !</p>
  
  <p>I have tried to update latest ADT. It shows me: <strong>Cannot complete the request. See the error log for details. Android Development Tools will be ignored because it is already installed, and updates are not permitted.</strong></p>