无法找到导致IllegalThreadStateException的错误

Whenever I try to reconnect to my socket pressing the connect button AGAIN after I disconnected with my dc button it always causes an IllegalThreadStateException. I have a Method for connecting to the socket and writing some messages to it and a Thread for reading messages I get from the socket. I cant find the problem because in my opinion it should all work how I want it to work. Whenever I try to reconnect to my socket pressi