android kotlin如何实现嵌套分页？

Question

I have a recyclerview, for i using pagin 3 with coroutine live data. but child recyclerview also have paginate data so how can i perform this nested pagination in android kotlin.

Answer 1

So, I done this with pagination for child recyclerview inside recyclerview. Firstly of all call api for fetch dates and perform api for every date at same time when date are fetching.

so structure like this...

lateinit var adapter: WeeklyAdapter
lateinit var dayAdapter: DayDetailsPagingAdapter


    private fun observeData() {
        viewModel.weeklyAcquiringDetails(AcquiringVM.WEEKLY, "").observe(this){
            wsWithLoader(it){
                binding.rvAcquiringWeeklyDetails.adapter = WeeklyAdapter(it.data!!.data, object : WeeklyAdapter.OnPerformApi{
                    override fun performApi(date: String, rvMonthly: RecyclerView) {
                        dayAdapter = DayDetailsPagingAdapter(object  : DayDetailsPagingAdapter.OnClick{
                            override fun onClick(result: DayAcquiring.Data) {}
                        })
                        rvMonthly.adapter = dayAdapter
                        lifecycleScope.launchWhenCreated {
                            viewModel.getDayAcquiringDetails(date).collectLatest { data ->
                                dayAdapter.submitData(data)
                            }
                        }
                    }
                })
            }
        }
    }

Weekly Adapter

class WeeklyAdapter ( val list: List<WeeklyAcquiring.Data>, val action: OnPerformApi ): RecyclerView.Adapter<WeeklyAdapter.ViewHolder>() {

    @NonNull
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(DataBindingUtil.inflate(LayoutInflater.from(parent.context), R.layout.list_monthly, parent, false))
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val result = list[position]
        holder.binding.apply {
            tvDate.text = changeDateFormat(result.doctorScheduleDate,"yyyy-MM-dd","E, dd MMM yyyy")
            action.performApi( result.doctorScheduleDate , rvMonthly)
        }
    }

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

    inner class ViewHolder(binding: ListMonthlyBinding) : BaseViewHolder<ListMonthlyBinding>(binding) {}

    interface OnPerformApi{
        fun performApi(date : String, rvMonthly: RecyclerView)
    }
    }

list_monthly_layout

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/tvDate"
            style="@style/TVBold"
            android:layout_marginTop="@dimen/_5sdp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="@dimen/_12sdp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:text="May 2022" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rvMonthly"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/_10sdp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:layout_constraintStart_toStartOf="parent"
            tools:listitem="@layout/list_acquiring_details"
            app:layout_constraintTop_toBottomOf="@+id/tvDate" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</layout>

DayDetailsPagingAdapter

class DayDetailsPagingAdapter (private val onClick: OnClick) : PagingDataAdapter<DayAcquiring.Data, DayDetailsPagingAdapter.ViewHolder>(DiffCallback()) {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    return ViewHolder(ListAcquiringDetailsBinding.inflate(LayoutInflater.from(parent.context), parent, false))
}

@SuppressLint("SetTextI18n")
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    val result = getItem(position)!!
    holder.binding.apply {
        data = result
        tvName.text = result.userName
        tvAmount.text = "€ ${result.amount}"
    }
}

class ViewHolder(val binding: ListAcquiringDetailsBinding) : RecyclerView.ViewHolder(binding.root) {}

private class DiffCallback : DiffUtil.ItemCallback<DayAcquiring.Data>() {
    override fun areItemsTheSame(
        oldItem: DayAcquiring.Data,
        newItem: DayAcquiring.Data
    ): Boolean = oldItem == newItem

    override fun areContentsTheSame(
        oldItem: DayAcquiring.Data,
        newItem: DayAcquiring.Data
    ): Boolean = oldItem == newItem
}

interface OnClick {
    fun onClick(result: DayAcquiring.Data )
}
}

**in viewmodel **

fun getDayAcquiringDetails( date: String ) = apiHelper.getDayAcquiringDetails( date ).cachedIn(viewModelScope)
fun weeklyAcquiringDetails( filter: String ,  date: String) = apiHelper.weeklyAcquiringDetails( filter , date)

hope you like this.