Android Question jMQTT read retained status

    Dim client As JavaObject = mqtt
   client = client.GetField("client")
   Dim event As Object = client.CreateEventFromUI("org.eclipse.paho.client.mqttv3.MqttCallback", "callback", Null)
   client.RunMethod("setCallback", Array(event))


Sub Callback_Event (MethodName As String, Args() As Object) As Object
   Log(MethodName)
   Select MethodName
       Case "messageArrived"
           Dim topic As String = Args(0)
           Dim MqttMessage As JavaObject = Args(1)
           
       Case "connectionLost"
           Log("Connection lost")
       Case "deliveryComplete"
           
   End Select
   Return Null
End Sub