gistfile1.cls

trigger WellDepthNotification on FX5__Job__c (after update) {
  for(FX5__Job__c job: Trigger.New)
  {
    if(job.Well_Depth__c > 50)
    {
      Messaging.PushNotification msg = new Messaging.PushNotification();
      String userId = job.OwnerId;
      Set<String> users = new Set<String>();
      users.add(userId);
      Map<String, Object> payload = new Map<String, Object>();
      payload.put('message', 'Well depth set to ' + job.Well_Depth__c);
      payload.put('url', URL.getSalesforceBaseUrl().toExternalForm() + '/' + job.Id);
      msg.setPayload(payload);
      msg.send('Android_Wear_Demo', users);
    }
  }
}