Allow `ItemBinding` to be null while `List == null`

Sometimes, you want to perform some initial processing to the list before creating the final OnItemBind subclass. However, the library will throw an error if ItemBinding is null.

It would really be helpful if ItemBinding can be null while the list is still null.

Right now, what we’re doing is providing a dummy ItemBinding, even though it won’t really be used, since we’ll swap it out with a different implementation anyway once we have a list.

[evant]

then allow BindingCollectionAdapter.setItemBinding(…) to accept nulls, so that it could be unset (and allow it to be GC’ed) when the list is unset.

Wouldn’t it be better to clear out the whole adapter in that case? (ex: recyclerview.setAdapter(null)).

[jasonsparc]

We tried the new PR (#180) and I think it’s fine. No one bothered complaining so I would say, I approve it! The only thing that’s missing now is a note in the README file about the new behavior.

Thank you so much for the quick response and implementation! I’ll be sure to check back for the new release. 🎉