I got the solution of my problem...
if i want to print data more than one time then you dont need to create new Socket Connection with the device... instead call outputstream.write(bytes) method.
and in the end if you want to disconnect device then call mBTScoket.close() method to disconnect device.
If you have made connection to the devices and paired it.
So for printing, printer wants the byte. SO I have createed a mothod.
Simply call this method and pass the String inside it to get printed.