With the DatePickerDialog we can have a fancy interface to set the date as this

(source: androidpeople.com)
I like it but it can only be used to set date so how could I build a “DatePickerDialog-like” AlertDialog?
I mean users could click on the “plus” and “minus” button as well as put in the number with keyboard.
Instead of only being able to select a single date, I’d be able to select three different numbers using the three up/down/scroll controls.
Alright, here you go, check this out. Then, check out Android Custom Dialogs, which would allow you to make your own custom dialog.
Check out this project for more information