Different child templates

[AlexanderBykin]

Hi
What should i do to use different child templates?
As i see getItemViewType of ExpandableRecyclerViewAdapter is used for other things

[AlexanderBykin]

Looks like i found a way to create different child view holders

1. override onCreateViewHolder of your adapter as below

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        return when (viewType) {
            ExpandableListPosition.GROUP -> {
                val gvh = onCreateGroupViewHolder(parent, viewType)
                gvh.setOnGroupClickListener(this)
                gvh
            }
            else -> onCreateChildViewHolder(parent, viewType)
        }
    }

2. override onCreateChildViewHolder as below

override fun onCreateChildViewHolder(parent: ViewGroup, viewType: Int): LoanRequestGroupItemViewHolderBase<*> {
        val view = LayoutInflater.from(context).inflate(viewType, parent, false)
        return when (viewType) {
            R.layout.list_item_group_item_loan_request_calc -> LoanRequestGroupItemCalcViewHolder(view)
            R.layout.list_item_group_item_loan_request_person -> LoanRequestGroupItemPersonViewHolder(view)
            else -> throw IllegalArgumentException("Not implemented onCreateChildViewHolder for ViewType=$viewType")
        }
    }

3. override getItemViewType as below to understand what child ViewHolder we want to return

override fun getItemViewType(position: Int): Int {
        val expandablePos = expandableList.getUnflattenedPosition(position)
        return when (expandablePos.type) {
            ExpandableListPosition.CHILD -> {
                when (val item =expandableList.groups[expandablePos.groupPos]) {
                    is LoanRequestGroups.LoanRequestGroupCalculator -> R.layout.list_item_group_item_loan_request_calc
                    is LoanRequestGroups.LoanRequestGroupPerson -> R.layout.list_item_group_item_loan_request_person
                    else -> throw IllegalArgumentException("Not implemented getItemViewType for ${item.javaClass.canonicalName}")
                }
            }
            else -> expandablePos.type
        }
    }

4. override onBindChildViewHolder as below

override fun onBindChildViewHolder(
        holder: LoanRequestGroupItemViewHolderBase<*>, flatPosition: Int, group: ExpandableGroup<*>,
        childIndex: Int
    ) {
        when (val item = group.items[childIndex]) {
            is AppMessages.LoanRequestCalculatorInfo -> (holder as LoanRequestGroupItemCalcViewHolder).onBind(item)
            is AppMessages.LoanRequestPersonInfo -> (holder as LoanRequestGroupItemPersonViewHolder).onBind(item)
            else ->throw IllegalStateException()
        }
    }

5. we are done, every child now have his own layout