MQTT官网:http://mqtt.org/
MQTT介绍:http://www.ibm.com
MQTT Android github:https://github.com/eclipse/paho.mqtt.android
MQTT API:http://www.eclipse.org/paho/files/javadoc/index.html
MQTT Android API: http://www.eclipse.org/paho/files/android-javadoc/index.html