如何将多个回收视图设置为单个适配器

Question

How to set multiple recycleview to single adapter?

I am creating an app, there are lot of categories in app and creating multiple adapter, model and recycle view makes an app complicated. It hard to make different adapter for multiple recycleview

Can I set multiple recycleview to one single adapter. By using if or else or switch cases how to do this?

Or is there any alternative??

Answer 1

I think this might help you.

data class CategoryCheckList(var type: Int, val list: Any)

fun initData() {
    val category1 = Category1()
    val list1 = arrayOfList<CategoryCheckList>()
    list1.add(CategoryCheckList(CATETORY_1), category1)

    recyclerView.adapter = SingleListAdapter(context, list)

    val category2 = Category2()
    val list2 = arrayOfList<CategoryCheckList>()
    list2.add(CategoryCheckList(CATETORY_2), category2)

    recyelerView2.adapter = SingleListAdapter(context, list2)
}

class SingleListAdapter(
    private val context: Context,
    private val list: ArrayList<CategoryCheckList>
) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        return when (viewType) {
            CATETORY_1 -> {
                val binding = ItemCategory1Binding.inflate(
                    LayoutInflater.from(parent.context), parent, false)
                Category1ViewHolder(binding)
            }
            else -> {
                val binding = ItemCategory2Binding.inflate(
                    LayoutInflater.from(parent.context), parent, false)
                Category2ViewHolder(binding)
            }
        }
    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        when (holder) {
            is Category1ViewHolder -> {
                list[position].let { holder.bind(it, position) }
            }
            is Category2ViewHolder -> {
                list[position].let { holder.bind(it, position) }
            }
            else -> {
                // default
                list[position].let { (holder as Category1ViewHolder).bind(it, position) }
            }
        }
    }

    override fun getItemCount(): Int {
        return list.size
    }

    override fun getItemViewType(position: Int): Int {
        return list[position].type
    }
}

class Category1ViewHolder(var binding: ItemCategory1Binding) :
    RecyclerView.ViewHolder(binding.root) {

    fun bind(categoryCheckList: CategoryCheckList, position: Int) {
        val nameHeader = categoryCheckList.list as Category1

        // do something
    }
}

class Category2ViewHolder(var binding: ItemCategory2Binding) :
    RecyclerView.ViewHolder(binding.root) {

    fun bind(categoryCheckList: CategoryCheckList, position: Int) {
        val checklist = categoryCheckList.list as Category2
        // do something
    }
}