package com.sincere.att.mqtt; public class MqtUtils { private static MqtUtils mqtUtils; private MqttManager mqttManager = null; public static MqtUtils getInstance() { if (null == mqtUtils) { synchronized (MqtUtils.class) { if (null == mqtUtils) mqtUtils = new MqtUtils(); } } return mqtUtils; } public MqtUtils() { mqttManager = new MqttManager(); mqttManager.init(); } public void sendMsg(String deviceId, String content) { mqttManager.sendMq(deviceId, content); } }