title: Error:Could not find com.android.tools.build:gradle:2.1.0-alpha1
body: <p>I update my android studio and restart it, it works properly but when i try to imoprt my previous project it shows error somthing like that:</p>
  
  <p>here is the snapshot of error...</p>
  
  <p><a href="http://i.stack.imgur.com/AynD4.png" rel="nofollow">Error during import the project</a></p>
  
  <p>and here is my gradle file...</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:2.1.0-alpha1'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>