Question

我在尝试显示一个包含多个ViewHolder的回收器时遇到麻烦，我正在测试并发送一个自定义列表，该列表仅包含数据以显示第一个ViewType的列表。

payments.add（购买（0，R.drawable.ic_cart，“”，“”）） payments.add（购买（0，R.drawable.ic_favorite，“”，“”）） Payments.add（Purchase（0，R.drawable.ic_arrow_back，“”，“”））

这是BottomSheetClass

class PaymentStepsFragment : SuperBottomSheetFragment() {

val payments = ArrayList<Any>()

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
    super.onCreateView(inflater, container, savedInstanceState)
    return inflater.inflate(R.layout.fragment_steps_payment, container, false)
}

private fun RecyclerAnimator(recyclerView: RecyclerView, adapter: PurchaseViewAdapter) {
    val itemAnimator = DefaultItemAnimator()
    itemAnimator.addDuration = 1000
    itemAnimator.removeDuration = 1000
    recyclerView.itemAnimator = itemAnimator
    recyclerView.adapter = adapter
    recyclerView.layoutManager = LinearLayoutManager(context)
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    payments.add(Purchase(0,R.drawable.ic_cart,"",""))
    payments.add(Purchase(0,R.drawable.ic_favorite,"",""))
    payments.add(Purchase(0,R.drawable.ic_arrow_back,"",""))
    val recycler = view.findViewById<RecyclerView>(R.id.payment_rv)
    val adapter = PurchaseViewAdapter(payments, context!!)
    RecyclerAnimator(recycler, adapter)
}

override fun getCornerRadius() = context!!.resources.getDimension(R.dimen.sheet_rounded_corner)

override fun getStatusBarColor() = Color.RED

}

和我的RecyclerViewAdapter。

constructor(list: List<Any>, context: Context) : this() {
        this.list = list
        this.context = context
}

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
    return when(viewType){
        0 -> {
            context = parent.context
            val menuItemLayoutView = LayoutInflater.from(parent.context).inflate(R.layout.fragment_card_payment, parent, false)
            PaymentViewHolder(menuItemLayoutView)
        }
        else -> {
            context = parent.context
            val menuItemLayoutView = LayoutInflater.from(parent.context).inflate(R.layout.fragment_card_payment, parent, false)
            PaymentViewHolder(menuItemLayoutView)
        }
    }
}

override fun getItemViewType(position: Int): Int {
    val data = list?.get(position) as Purchase
    return data.type
}

override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
    when(holder.itemViewType){
        0 -> {
            val holder_payment = holder as PaymentViewHolder
            val menuItem = list!![position] as Purchase
            holder_payment.paymentTimeline.marker = ContextCompat.getDrawable(context!!,menuItem.resource)
        }
        else -> {
            val holder_payment = holder as PaymentViewHolder
            val menuItem = list!![position] as Purchase
            holder_payment.paymentTimeline.marker = ContextCompat.getDrawable(context!!,menuItem.resource)
        }
    }
}

但是，当我发送要显示的信息时，它总是将列表返回为空，我不知道问题出在哪里，看起来好像发送的数据很好。

RecyclerViewAdapter的构造函数将打印获得的列表，但是该列表不会显示要在RecyclerView中膨胀的DesiredViewHolders ...

根据要求，我在“ RecyclerView”中添加了版式

<?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"
        android:id="@+id/view_bottom_sheet_attributes"
        tools:background="@color/colorWhite">

    <androidx.appcompat.widget.AppCompatTextView
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:id="@+id/text_attributes_heading"
            android:gravity="center"
            android:paddingLeft="12dp"
            android:text="TEMPORAL"
            android:textSize="18sp"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

    <View
            android:layout_width="0sp"
            android:layout_height="1dp"
            android:background="@color/colorDivider"
            app:layout_constraintTop_toBottomOf="@id/text_attributes_heading"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

    <androidx.appcompat.widget.AppCompatImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/image_toggle"
            android:layout_marginRight="5dp"
            app:srcCompat="@drawable/ic_expand_less_black_24dp"
            app:layout_constraintTop_toTopOf="@id/text_attributes_heading"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="@id/text_attributes_heading"/>

    <androidx.recyclerview.widget.RecyclerView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:id="@+id/payment_rv"
            android:fillViewport="true"
            android:padding="5dp"
            android:clipToPadding="false"
            app:layout_constraintTop_toBottomOf="@id/text_attributes_heading"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toTopOf="@id/button_apply">

    </androidx.recyclerview.widget.RecyclerView>

    <View
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:background="@color/colorDivider"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@id/payment_rv"/>

    <com.google.android.material.button.MaterialButton
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:id="@+id/button_apply"
            android:layout_margin="5dp"
            android:text="@string/purchase"
            style="@style/Widget.MaterialComponents.Button"
            android:insetTop="0dp"
            android:insetBottom="0dp"
            app:cornerRadius="0dp"
            app:layout_constraintTop_toBottomOf="@id/payment_rv"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

还有ViewHolder的类型，似乎没有达到重写功能...

Answer 1

检查您的布局XML，看起来RecyclerView视图被其他视图隐藏了

Kotlin RecyclerView在BottomSheet中具有多个ViewHolders

1 个答案: