Refinement List

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class MyActivity: AppCompatActivity() {

    class MyFacetListViewHolder(view: View): FacetListViewHolder(view) {

        override fun bind(facet: Facet, selected: Boolean, onClickListener: View.OnClickListener) {
           // Bind your view
        }

        object Factory: FacetListViewHolder.Factory {

            override fun createViewHolder(parent: ViewGroup): FacetListViewHolder {
                // Inflate your layout
                val view = View(parent.context)

                return MyFacetListViewHolder(view)
            }
        }
    }

    val client = ClientSearch(
        ApplicationID("YourApplicationID"),
        APIKey("YourAPIKey")
    )
    val index = client.initIndex(IndexName("YourIndexName"))
    val searcher = SearcherSingleIndex(index)
    val filterState = FilterState()
    val attribute = Attribute("facetName")
    val viewModel = FacetListViewModel()
    val presenter = FacetListPresenterImpl(listOf(FacetSortCriterion.CountDescending), limit = 5)
    val connection = ConnectionHandler()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // You can use the default FacetListAdapter, or implement your own UI component that fulfill the FacetListView interface.
        val view: FacetListView = FacetListAdapter(MyFacetListViewHolder.Factory)

        connection += searcher.connectFilterState(filterState)
        connection += viewModel.connectFilterState(filterState, attribute, FilterOperator.Or)
        connection += viewModel.connectSearcher(searcher, attribute)
        connection += viewModel.connectView(view, presenter)

        searcher.searchAsync()
    }

    override fun onDestroy() {
        super.onDestroy()
        connection.disconnect()
        searcher.cancel()
    }
}