在android的状态栏中增加menu，home和back快捷键的方法

基于ARM—Linux的智能家居系统，可以通过网络通信与安卓客户端连接并查看，采集来得温湿度及视屏！温湿度通过ZigBee采集，安卓端可以控制上限值计报警！-Based Smart Home System ARM-Linux, you can connect and view, capture more temperature and humidity and screen through the network to communicate with the Android client! Z