通过同一活动中的套接字发送和接收数据

i'm using TCP socket to send and receive data from the same socket in the same activity through client server thread, the purpose of that is to send a string to other device and that string will trigger a notification once the other device receives it then that device will replay with something like dismiss or accepted, the problem that i'm having is after sending the string the other device receives it and send the dismiss or accepted String but my divice doesn't receive that string i guess there is a problem in my i'm using TCP socket to send and receive data f