title: Android GCM get send notification result from multiple device
body: <p>I want to send push notification to several devices, and I can do it by using this post data:</p>
  
  <pre><code>{
    "registration_ids" : 
    ["id_1",   "id_2",  "id_3"],
    "data" :{
      "messageContent": "Good Morning People!"
    }
  }
  </code></pre>
  
  <p>But the problem is, how can I know the result for each device, because what I get is the result for the whole post data. In this example, I got success 3.</p>
  
  <pre><code>{
      "multicast_id": 0000xxxx123123,
      "success": 3,
      "failure": 0,
      "canonical_ids": 1,
      "results": [
          {
              "message_id": "0:540728299xxxxxxxasdasdasdasdasdas"
          },
          {
              "message_id": "0:540728299xxxxxxxasdasdasdasdasdas"
          },
          {           
              "message_id": "0:540728299xxxxxxxasdasdasdasdasdas"
          }
      ]
  }
  </code></pre>
  
  <p>If I got success 2 and failure 1, how can I know which device is failed to be sent?</p>