title: Gradle Sync failed could not find constraint-layout:1.0.0-alpha2
body: <p><strong>Problem :</strong></p>
  
  <pre><code>Error:Could not find com.android.support.constraint:constraint-layout:1.0.0-alpha2.
  Required by:
  myapp:app:unspecified
  </code></pre>
  
  <p><strong>Background :</strong>
  Android Studio 2.2 P 1</p>