mikepenz/FastAdapter

implementation "com.mikepenz:fastadapter:${latestFastAdapterRelease}"
implementation "androidx.appcompat:appcompat:${androidX}"
implementation "androidx.recyclerview:recyclerview:${androidX}"

implementation "com.mikepenz:fastadapter-extensions-expandable:${latestFastAdapterRelease}"

implementation "com.mikepenz:fastadapter-extensions-binding:${latestFastAdapterRelease}" // view binding helpers
implementation "com.mikepenz:fastadapter-extensions-diff:${latestFastAdapterRelease}" // diff util helpers
implementation "com.mikepenz:fastadapter-extensions-drag:${latestFastAdapterRelease}" // drag support
implementation "com.mikepenz:fastadapter-extensions-paged:${latestFastAdapterRelease}" // paging support
implementation "com.mikepenz:fastadapter-extensions-scroll:${latestFastAdapterRelease}" // scroll helpers
implementation "com.mikepenz:fastadapter-extensions-swipe:${latestFastAdapterRelease}" // swipe support
implementation "com.mikepenz:fastadapter-extensions-ui:${latestFastAdapterRelease}" // pre-defined ui components
implementation "com.mikepenz:fastadapter-extensions-utils:${latestFastAdapterRelease}" // needs the `expandable`, `drag` and `scroll` extension.

// required for the ui components and the utils
implementation "com.google.android.material:material:${androidX}"

open class SimpleItem : AbstractItem<SimpleItem.ViewHolder>() {
    var name: String? = null
    var description: String? = null

    /** defines the type defining this item. must be unique. preferably an id */
    override val type: Int
        get() = R.id.fastadapter_sample_item_id

    /** defines the layout which will be used for this item in the list */
    override val layoutRes: Int
        get() = R.layout.sample_item

    override fun getViewHolder(v: View): ViewHolder {
        return ViewHolder(v)
    }

    class ViewHolder(view: View) : FastAdapter.ViewHolder<SimpleItem>(view) {
        var name: TextView = view.findViewById(R.id.material_drawer_name)
        var description: TextView = view.findViewById(R.id.material_drawer_description)

        override fun bindView(item: SimpleItem, payloads: List<Any>) {
            name.text = item.name
            description.text = item.name
        }

        override fun unbindView(item: SimpleItem) {
            name.text = null
            description.text = null
        }
    }
}

class BindingIconItem : AbstractBindingItem<IconItemBinding>() {
    var name: String? = null

    override val type: Int
        get() = R.id.fastadapter_icon_item_id

    override fun bindView(binding: IconItemBinding, payloads: List<Any>) {
        binding.name.text = name
    }

    override fun createBinding(inflater: LayoutInflater, parent: ViewGroup?): IconItemBinding {
        return IconItemBinding.inflate(inflater, parent, false)
    }
}

//create the ItemAdapter holding your Items
val itemAdapter = ItemAdapter<SimpleItem>()
//create the managing FastAdapter, by passing in the itemAdapter
val fastAdapter = FastAdapter.with(itemAdapter)

//set our adapters to the RecyclerView
recyclerView.setAdapter(fastAdapter)

//set the items to your ItemAdapter
itemAdapter.add(ITEMS)

// Gets (or creates and attaches if not yet existing) the extension from the given `FastAdapter`
val selectExtension = fastAdapter.getSelectExtension()
// configure as needed
selectExtension.isSelectable = true
selectExtension.multiSelect = true
selectExtension.selectOnLongClick = false
// see the API of this class for more options.

// Gets (or creates and attaches if not yet existing) the extension.
val expandableExtension = fastAdapter.getExpandableExtension()
// configure as needed
expandableExtension.isOnlyOneExpandedItem = true

fastAdapter.onClickListener = { view, adapter, item, position ->
    // Handle click here
    false
}

// just add an `EventHook` to your `FastAdapter` by implementing either a `ClickEventHook`, `LongClickEventHook`, `TouchEventHook`, `CustomEventHook`
fastAdapter.addEventHook(object : ClickEventHook<SimpleImageItem>() {
    override fun onBind(viewHolder: RecyclerView.ViewHolder): View? {
        //return the views on which you want to bind this event
        return if (viewHolder is SimpleImageItem.ViewHolder) {
            viewHolder.viewWhichReactsOnClick
        } else {
	    null
	}
    }

    override fun onClick(v: View, position: Int, fastAdapter: FastAdapter<SimpleImageItem>, item: SimpleImageItem) {
        //react on the click event
    }
})

// Call this in onQueryTextSubmit() & onQueryTextChange() when using SearchView
itemAdapter.filter("yourSearchTerm")
itemAdapter.itemFilter.filterPredicate = { item: SimpleItem, constraint: CharSequence? ->
    item.name?.text.toString().contains(constraint.toString(), ignoreCase = true)
}

val dragCallback = SimpleDragCallback()
val touchHelper = ItemTouchHelper(dragCallback)
touchHelper.attachToRecyclerView(recyclerView)

override fun itemTouchOnMove(oldPosition: Int, newPosition: Int): Boolean {
    DragDropUtil.onMove(fastItemAdapter.itemAdapter, oldPosition, newPosition) // change position
    return true
}

// Header is a model class for your header
val headerAdapter = ItemAdapter<Header>()

val itemAdapter = GenericItemAdapter()

val fastAdapter: GenericFastAdapter = FastAdapter.with(headerAdapter, itemAdapter) //the order defines in which order the items will show up
// alternative the super type of both item adapters can be used. e.g.:
recyclerView.setAdapter(fastAdapter)

val footerAdapter = ItemAdapter<ProgressItem>()

recyclerView.addOnScrollListener(object : EndlessRecyclerOnScrollListener(footerAdapter) {
     override fun onLoadMore(currentPage: Int) {
         footerAdapter.clear()
         footerAdapter.add(ProgressItem())
         
	 // Load your items here and add it to FastAdapter
         itemAdapter.add(NEWITEMS)
    }
})

val expandableExtension = fastAdapter.getExpandableExtension()

open class SimpleSubExpandableItem : AbstractExpandableItem<SimpleSubExpandableItem.ViewHolder>() {

    /**
     * BASIC ITEM IMPLEMENTATION
     */
}

Copyright 2021 Mike Penz

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.