Read and Write Bytes data packet via socket

Question

I want to connect Android Device to external device via Socket. Socket Connect to external device successfully.

Now if any data require from external device then send re

Answer 1

You're doing this the hard way. Get rid of the ByteBuffer altogether and use all the methods of DataOutputStream. They are all big-endian. I can't see any mistake but clearly you must be sending something the peer didn't understand so he is closing the connection instead of sending a reply.

Note: Socket.isConnected() cannot possibly be false at the point you're testing it.