SelectingAdapter

Gradle dependencies

implementation 'ru.ircover.selectionmanager:core:1.1.0'
implementation 'ru.ircover.selectionmanager:livesource:1.0.1'
implementation 'ru.ircover.selectionmanager:selectingadapter:1.0.0'

It's an extension for LiveDataSource library for easy creating RecyclerView.Adapter class.

Create Adapter

The easiest way to create list adapter: inherit your class from BaseSelectingListAdapter. The only thing you need to do then - to write code for you holder.

class MyAdapter : BaseSelectingListAdapter<User, MyHolder>() {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
        MyHolder(...)//create your holder view
}

class MyHolder(itemView: View) : BaseSelectingListHolder<User>(itemView) {
    override fun bindItem(item: User, isSelected: Boolean, onClick: (() -> Unit)?) {
        //bind your data
    }
}

Setup Adapter with LiveDataSource

There are 3 things you can easily setup:

val users = LiveDataSource<User>(MultipleSelection())
adapter.observeItemsChange(this, users) //after any data source changes it will be delivered into `BaseSelectingListAdapter.items` property
adapter.observeSelectionChange(this, users) //after any selection changed `Adapter.notifyItemChanged` will be called
adapter.setCallback(users) //sets callback for `BaseSelectingListAdapter` to direct all selection methods to `LiveDataSource` object

There are 2 additional methods to make more action in 1 string:

adapter.observeAllChanges(this, users) //it calls `observeItemsChange` and `observeSelectionChange`
//or
adapter.fullyInitialize(this, users) //it calls all described above methods

Create your own Adapter

If BaseSelectingListHolder is not applicable for some reason just implement SelectingListAdapter interface. While observeItemsChange and observeSelectionChange are extension methods, they will work.

class MyAdapter : RecyclerView.Adapter<MyHolder>(), SelectingListAdapter<T> { ... }
//still works
adapter.observeItemsChange(this, users)
adapter.observeSelectionChange(this, users)
//doesn't work as it's not `BaseSelectingListAdapter` anymore
adapter.setCallback(users)
adapter.fullyInitialize(this, users)