android bluetooth can't connect

Question

I\'ve been having this problem for a while and haven\'t been able to figure it out.

I have a android application that puts all paired devices in a listview. When you cl

Answer 1

I got the same error message after connecting the socket a second time. I simply checked if the socket is already connected.

if(!mmSocket.isConnected())
            mmSocket.connect();

I was testing on Android 4.4.2 (Moto G).

Answer 2

The jelly bean bluetooth stack is markedly different from the other versions.

This might help: http://wiresareobsolete.com/wordpress/2010/11/android-bluetooth-rfcomm/

In gist: The UUID is a value that must point to a published service on your embedded device, it is not just randomly generated. The RFCOMM SPP connection you want to access has a specific UUID that it publishes to identify that service, and when you create a socket it must match the same UUID.

If you are targeting 4.0.3 device and above , use fetchUuidsWithSdp() and getUuids() to find all the published services and their associated UUID values. For backward compatibility read the article