title: Does Google Cloud Messaging send messages to devices that are in standby mode?
body: <p>If an Android device is in standby mode, in which the screen is off, can Google Cloud Messaging send a message to that device? Or does GCM have to wait until the device comes out of standby mode in order to receive messages?</p>
  
  <p>In the docs it states:</p>
  
  <blockquote>
    <p>Google enqueues and stores the message in case the device is offline.
    When the device is online, Google sends the message to the device.</p>
  </blockquote>
  
  <p>There is no indication however what is meant by <em>offline</em> or <em>online</em>. Is a device still <em>online</em> even though its screen is off?</p>