成功:1 在安卓中仍然没有通知

我正在尝试通过GCM发送推送通知，但我得到：

{
  "multicast_id":4793018731783267982,
  "success":1,
  "failure":0,
  "canonical_ids":0,
  "results": [
    { "message_id":"0:1452928098906665%a69ccee8f9fd7ecd" }
  ]
}

但仍然没有通知。这是我的代码：

//index.php code
 $app->get( '/notify',function () use($app)
         {
                   $response = array ();
                    $regId="device registration id";   //hard coded
                    $message="hi everyone.this is to notify you" ;
                    $registatoin_ids = array($regId);
                    $message = array("price" => $message);
                    $db = new DbHandler ();
                    $result = $db->send_notification($registatoin_ids, $message);
                    echoRespnse ( 200, $result);
            } );
//Dbhandler code 
public function send_notification($registatoin_ids, $message) {

    $url = 'https://android.googleapis.com/gcm/send';
    $fields = array(
        'registration_ids' => $registatoin_ids,
        'data' => $message,
    );
    $headers = array(
        'Authorization: key=AIzaSyByR3xuTkhB-OZSNTlQqlwnqsLBzqXUWb0',  //server key 
        'Content-Type: application/json'
    );
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    // Disabling SSL Certificate support temporarly
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
    // Execute post
    $result = curl_exec($ch);
    if ($result === FALSE) {
        die('Curl failed: ' . curl_error($ch));
    }
    // Close connection
    curl_close($ch);
    return $result;
}

注：I我直接从高级 REST 客户端而不是 Android 设备运行此 API。我的响应成功，但在我在此处硬编码其reg_id的设备上没有通知。请帮忙

我在安卓端写了这段代码：

if (checkPlayServices()) 
{
    gcm = GoogleCloudMessaging.getInstance(this);
    if (regid.isEmpty())
    {
        new register().execute();
    }
    else
    {
        Log.i("hello", "No valid Google Play Services APK found.");
    }
}
public class register extends AsyncTask<Void, Integer, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }
    @Override
    protected String doInBackground(Void... params) {
         String msg = "";
         try 
         {
              if (gcm == null) 
              {
                   gcm = GoogleCloudMessaging.getInstance(getApplicationContext());
              }
              regid = gcm.register(AppConst.SENDER_ID);              
              Log.i("hello", "Current Device's Registration ID is: "+regid);     
         } 
         catch (IOException ex) 
         {
             msg = "Error :" + ex.getMessage();
         }
         return null;
    }
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
    }
}

在Mainfest中，我添加了：

     <receiver
        android:name=".GcmBroadcastReceiver"
        android:permission="com.google.android.c2dm.permission.SEND"
         >
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            <category android:name="com.example" />
        </intent-filter>
    </receiver>