New Variant with View Binding Support

[lkishor]

Many thanks to @lisawray and the community to create and maintain this library.👏

Now that Android Studio 3.6 ships with ViewBinding. A annotation processing free option for generating Layout bindings.

It will be great to have an option to use Groupie with it.

I can put some effort and create a PR if needed.

[ValCanBuild]

PRs for this are welcome 👍

[lkishor]

It is rather simple at first glance, Though needed opinion on how to name the classes:

BindableItem -> ViewBindableItem?
GroupieViewHolder -> VBViewHolder?

Also, in BindableItem

@NonNull
@Override
public GroupieViewHolder<T> createViewHolder(@NonNull View itemView) {
    T viewDataBinding = DataBindingUtil.bind(itemView);
    return new GroupieViewHolder<>(viewDataBinding);
}

DataBindingUtil is not available, so we will have to provide an abstract method to create new instance of T
Something like

public abstract T initBinding(@NonNull View itemView);

@NonNull
@Override
public VBViewHolder<T> createViewHolder(@NonNull View itemView) {
    T viewBinding = initBinding(itemView);
    return new VBViewHolder<>(viewBinding);
}

So the user will now have to provide implementation of 1 more method.

Is this acceptable, or is there an alternate option?

[aoben10]

I like this idea @lkishor

[ValCanBuild]

I'm open to reviewing a PR on this, though I don't like asking the user to provide one more method - would there be a way around this? I've not read too much into how Viewbinding works or how it's best used.

[aoben10]

Groupie's BindableItem relies on DataBindingUtil#bind to create a subclass of the ViewDataBinding. There's no utility to create an instance of ViewBinding so the only way I can think of would be for the user to provide this via an abstract method

[ValCanBuild]

Now implemented in 2.8.0 - please give it and try and give feedback. Thanks again @nashcft