新手求助，socket编程出了点问题

Question

socket线程

Answer 1

int numOfBytesReceived=msg.arg1;
byte[]buffer=(byte[])msg.obj;
String strReceived=new String(buffer);
strReceived=strReceived.substring(0,numOfBytesReceived);
数组越界了，看看这个String的长度吧

Answer 2

原因是msg.arg1值是-1，但是我不知道怎么改才行

Answer 3

CommsThread ]MainActivity.UIupdater.obtainMessage
                        (0,bytes,-1,buffer).sendToTarget();改成 if(bytes >0 ) ]MainActivity.UIupdater.obtainMessage
                        (0,bytes,-1,buffer).sendToTarget();