这是一个检测蓝牙连接状态的程序，可以在检测到蓝牙配对丢失时发出报警信号-This is a Bluetooth connection status detection program, you can detect the Bluetooth pairing is lost when an alarm signal

安卓手机的蓝牙通讯代码,可以实现简单的蓝牙搜索功能，及配对功能，实现蓝牙通讯-Android phone s Bluetooth communications code, can achieve a simple Bluetooth search function, and the pairing function, to achieve Bluetooth communication