http://harryjoy.com/2012/08/18/file-transfer-in-android-with-asmack-and-openfire/

http://www.javacodegeeks.com/2012/08/android-file-transfer-with-asmack-and.html

http://www.devdiv.com/forum.php?mod=viewthread&tid=128328

http://233.io/article/1036242.html

File transfer in android with asmack and Openfire