问题
The Android NumberPicker widget has a lot of space between the current item and the blue lines above and below it. Is there any way to change this spacing to be more compact, so the whole widget does not take so much vertical space?
(I do not want to scale the entire widget, just reduce the spacing).
回答1:
You can to customize the DatePicker using a Library. In example below has a class named "NumberPicker.java", that you can change the vertical spacing and other things.
https://github.com/rodrigobusata/android-pickers
I hope to have helped.
UPDATE
You mustn't use this library because this UI is deprecated. Now you must use Material Design DatePicker. To this, you can use this other lib.
https://github.com/wdullaer/MaterialDateTimePicker
来源：https://stackoverflow.com/questions/28056744/how-to-change-vertical-spacing-in-android-numberpicker