question: public byte receiveOneByte ( ) { Log . d ( TAG , "receiveOneByte() entrance" ) ; try { acquireLock ( ) ; mServerSocket . receive ( mReceivePacket ) ; Log . d ( TAG , "receive: " + ( 0 + mReceivePacket . getData ( ) [ 0 ] ) ) ; return mReceivePacket . getData ( ) [ 0 ] ; } catch ( IOException e ) { e . printStackTrace ( ) ; } return Byte . MIN_VALUE ; }
target:  Receive one byte from the port and convert it into String