title: how to connect the library gcm in gradle?
body: <p>I downloaded the example <a href="https://code.google.com/p/gcm/source/browse/" rel="nofollow">link</a></p>
  
  <p>ran it and it worked fine. but now I want to do it in the android studio. I try to connect the library:</p>
  
  <pre><code>compile "com.google.android.gms:play-services:6.1.71" 
  </code></pre>
  
  <p>but the classes are not visible and the package too</p>
  
  <pre><code> android:name="com.google.android.gcm.GCMBroadcastReceiver"
  </code></pre>
  
  <p>how to connect the library GCM in gradle?</p>