RecyclerView не отображает кастомные View

Question

Возникла проблема с RecyclerView, не могу найти решение в гугле. Есть фрагмент, внутри RecyclerView. Элементы генерятся, но не отображаются.

Класс фрагмента - https://github.com/LazyTechwork/QRScanner/blob/master/app/src/main/java/ru/lazytechwork/qrscanner/fragments/HistoryFragment.kt

class HistoryFragment : Fragment() {
    private var scans: List<Scan> = emptyList()
    private val ioScope = CoroutineScope(Dispatchers.IO)
    private lateinit var recyclerView: RecyclerView
    private lateinit var viewAdapter: ScanHistoryAdapter

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

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_history, container, false)

        viewAdapter = ScanHistoryAdapter(scans, (activity as MainActivity).db)
        recyclerView = view.findViewById<RecyclerView>(R.id.scanlist).apply {
            setHasFixedSize(true)
            adapter = viewAdapter
        }

        ioScope.launch {
            scans = (activity as MainActivity).getScans()
            viewAdapter.updateDataset(scans)
        }
        return view
    }

}

XML фрагмента - https://github.com/LazyTechwork/QRScanner/blob/master/app/src/main/res/layout/fragment_history.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/scanlist"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:scrollbars="vertical"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constrainedHeight="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/history_item" />
</androidx.constraintlayout.widget.ConstraintLayout>

Код адаптера - https://github.com/LazyTechwork/QRScanner/blob/master/app/src/main/java/ru/lazytechwork/qrscanner/data/adapters/ScanHistoryAdapter.kt

class ScanHistoryAdapter(private var dataset: List<Scan>, private val db: AppDatabase) :
    RecyclerView.Adapter<ScanHistoryAdapter.ViewHolder>() {
    class ViewHolder(val historyItem: HistoryItem) : RecyclerView.ViewHolder(historyItem)

    override fun onCreateViewHolder(
        parent: ViewGroup,
        viewType: Int
    ): ViewHolder =
        ViewHolder(HistoryItem(parent, db))


    fun updateDataset(scans: List<Scan>) {
        dataset = scans
        notifyDataSetChanged()
    }

    override fun getItemCount(): Int = dataset.size

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val viewItem = holder.historyItem
        val scan = dataset[position]
        viewItem.setScan(scan)
    }
}

В Android Studio всё нормально отображается.

Answer 1

Вот тебе новый адаптер. Проверил, все работает

class ScanHistoryAdapter2(val db: AppDatabase) :
    RecyclerView.Adapter<ScanHistoryAdapter2.ScanViewHolder>() {

    var items: List<Scan> = arrayListOf()
        set(value) {
            field = value
            notifyDataSetChanged()
        }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = 
        ScanViewHolder(
            LayoutInflater.from(parent.context).inflate(
                R.layout.history_item,
                parent,
                false
            )
        )

    override fun onBindViewHolder(holder: ScanViewHolder, position: Int) =
        holder.bind(position)

    override fun getItemCount() =
        items.size

    inner class ScanViewHolder(
        view: View
    ) : RecyclerView.ViewHolder(view) {

        fun bind(positon: Int) {
            val scan = items[positon]
            with(itemView) {
                history_name.text = scan.name
                history_date.text = MainActivity.DATE_FORMAT.format(scan.date)
                history_data.text = scan.data
                history_type.setImageResource(
                    when (scan.type) {
                        HistoryType.LINK -> R.drawable.ic_link_outline
                        HistoryType.TEXT -> R.drawable.ic_text_outline
                        HistoryType.CONTACT -> R.drawable.ic_contact_outline
                    }
                )
                favourite_switch.apply {
                    isChecked = scan.isFavourite
                    setOnCheckedChangeListener(FavouriteSwitcher2(db, scan))
                }
            }
        }
    }
}

class FavouriteSwitcher2(private val db: AppDatabase, private val scan: Scan) :
    CompoundButton.OnCheckedChangeListener {
    private val ioScope = CoroutineScope(Dispatchers.IO)
    override fun onCheckedChanged(buttonView: CompoundButton?, isChecked: Boolean) {
        ioScope.launch {
            if (isChecked)
                db.scansInterface().makeFavourite(scan)
            else
                db.scansInterface().removeFavourite(scan)
        }
    }
}

БЛОГ НА HUSL

RecyclerView не отображает кастомные View

Ответы (1 шт):