Add the ability to show/hide headers on demand.

[raycoarana]

With this little change we could implement our UI that requires to show headers only when searching.

[emilsjolander]

I would rather implement this inside the adapter. An optional method like ?shouldShowHeaderForPosition(int position) this allows for more flexibility

[raycoarana]

I don't see the use case where you need that flexibility. If you show for position 1, hide por position 2, then item at position 2 will look like be inside the same header as item 1, so its the same as telling the list that items 1 and 2 creates the same header.

[tomoyuki28jp]

@emilsjolander

I would rather implement this inside the adapter. An optional method like ?shouldShowHeaderForPosition(int position) this allows for more flexibility

StickyListHeadersAdapter is an interface. How do you wan to implement this as an optional method inside the adapter?

[tomoyuki28jp]

@emilsjolander

I see few people want this feature.
#344
#362

just have the lists empty view include the same layout as the first header.
#232 (comment)

I understand what you say, but providing this option like shouldShowHeaderForPosition is a bit easier.

[patedit]

I've created a new PR for this feature tracking the problem down using a different approach (i.e. modifying the adapter VS switching between adapters for the WrapperList). This'll have some benefits from a UX point of view. Thanks! #453