实现3位数码管移位，ls164的用法和编译-To achieve three digital tube shift, ls164 usage and compilation

简化了 android sdk 里带的 blue chat 例子，用一个大的类实现了蓝牙设备的发现/管理/通讯。-Simplifies the inner tube of blue chat of android sdk example, with a large class implements the Bluetooth device discovery/management/communication.

android 实现图书馆管理，可以在手机上管理自己的图书馆管-android realization library management, you can manage your library on your phone tube