Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.
You'll have the usual powering-the-Kinect problem. Just a USB port isn't enough; see the Create <-> Kinect Tutorial for details on how to build a power supply in a particular case.
The Kinect (both the OpenNI and libfreenect versions) are in C[++], not Java. I don't know if user processes on Android have to be in Java, but just having ROSJava doesn't get you Kinect support out of the box.