title: Android Studio 2.2 don't open any of projects that are created by Others
body: <p>well I downloaded <strong>Udacity</strong> course exercise projects. when i tries to import an existing <strong>Gradle</strong> based project by selecting <strong>setting.gradle</strong>. Android studio opens a Window entitled with <strong>Building project X</strong> and progress bar and than it stucks on this screen window and nothing happens . no matter how much i wait.</p>
  
  <p><strong>I invalidated caches and restarted the Android Studio but it wasn't handy.</strong></p>
  
  <p>Help!!!!</p>