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26

answers:

1

I mean widgets that are not going to be touched through program code.

+1  A: 

No. The id used to access widgets from code. If you don't need that, you don't need an ID.

TuomasR
There is one special case where you may need to add an id to a view that is not referenced from code. If you are using RelativeLayouts the ids will be used to identify views to define layout_above or layout_alignBaseline etc.
Janusz