UIHandler和Handler之间有什么区别

I want to show numbers from 1 to 100 in sequel order in the TextView and to wait 1 second after printing each number. I also want to implement it using Android services. I don't know the difference between UIHandler and Handler. When I google about this issue, all I am getting is the difference between handler and a thread.I want to show numbers from 1 to 100 in sequel