Bottom Sheet Dialog中RecyclerView仅显示单个条目问题求助

我了解该问题此前已有提问，但现有解答未能帮到我，目前无法定位问题所在。我在一个Activity中展示Bottom Sheet，该Bottom Sheet包含标题和RecyclerView，但无论传入Adapter多少数据，RecyclerView始终仅显示一个条目，虽可滚动切换条目，但同一时间仅能看到一条。

Activity布局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"
    tools:context=".features.order.automatedcheckout.view.AutomatedCheckoutQRCodeActivity"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <TextView
        android:id="@+id/scanBarcodeInstruction"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="50dp"
        android:text="Scan the barcode to get started"
        android:textSize="18sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/loadingGuideline"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.5"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <ProgressBar
        android:id="@+id/progressIndicator"
        app:layout_constraintBottom_toTopOf="@+id/loadingGuideline"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/scanBarcodeInstruction"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/qrcodeImageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/scanBarcodeInstruction"/>
    
    <TextView
        android:id="@+id/tenderName"
        app:layout_constraintTop_toBottomOf="@+id/qrcodeImageView"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    
    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:id="@+id/changeTenderButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="10dp"
        android:visibility="gone"
        android:layout_marginBottom="20dp"
        android:layout_marginRight="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:text = "Change Tender"/>
</androidx.constraintlayout.widget.ConstraintLayout>

Bottom Sheet Fragment布局XML #

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/bottomSheetLayout"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <TextView
        android:id="@+id/tenderTitle"
        android:layout_marginTop="20dp"
        android:layout_marginStart="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SELECT"/>
    
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/tenderList"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</androidx.appcompat.widget.LinearLayoutCompat>

Bottom Sheet Fragment代码 #

class TenderBottomSheetFragment : BottomSheetDialogFragment() {
    private var _binding: FragmentTenderBottomSheetBinding? = null
    private val binding get() = _binding!!

    private lateinit var onTenderClicks:(tenderDetails: Pair<Int?, String?>) -> Unit

    lateinit var adapter: TenderAdapter

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = FragmentTenderBottomSheetBinding.inflate(inflater, container, false)
        adapter = TenderAdapter (
            arguments?.parcelableArrayList(ARG_TENDERS)!!,
            onTenderClicks
        )

        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        val layoutManager = LinearLayoutManager(requireContext())
        binding.tenderList.layoutManager = layoutManager
        binding.tenderList.addItemDecoration(DividerItemDecoration(requireContext(), layoutManager.orientation))
        binding.tenderList.adapter = adapter
    }

    companion object {
        fun newInstance(
            campusTenders: List<TenderKt>,
            onTenderClick: (tenderDetails: Pair<Int?, String?>) -> Unit
        ): TenderBottomSheetFragment {
            val tenderDialogFragment = TenderBottomSheetFragment()
            tenderDialogFragment.onTenderClicks = onTenderClick
            tenderDialogFragment.apply {
                arguments = Bundle().apply {
                    putParcelableArrayList(ARG_TENDERS, ArrayList(tenders))
                }
            }
            return tenderDialogFragment
        }
    }

    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }
}

问题解决（更新内容） #

原RecyclerView子项布局 #

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_marginStart="10dp"
    android:layout_marginEnd="10dp"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    
    <TextView
        android:id="@+id/campus_tender_name"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:text ="Flex Account"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</androidx.constraintlayout.widget.ConstraintLayout>

修改后的子项布局 #

<TextView
    android:id="@+id/campus_tender_name"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:padding="10dp"
    tools:text = "Flex Account"
    android:textSize="16sp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

问题根源在于RecyclerView子项的根布局使用了ConstraintLayout且设置android:layout_height="match_parent"，导致每个子项都占据了RecyclerView的全部高度，因此同一时间只能看到一个条目。修改后子项高度自适应内容，即可正常显示所有条目。

内容的提问来源于stack exchange，提问作者DJ-DOO