RecyclerView报错No adapter attached; skipping layout 求排查解决

我遇到了RecyclerView的「No adapter attached; skipping layout」错误，尝试了网上几乎所有解决方案仍未解决。以下是我的相关代码，希望有人能帮忙找出问题所在：

val recyclerview = view.findViewById<RecyclerView>(R.id.memberRecyclerView)
val layoutManager: RecyclerView.LayoutManager = LinearLayoutManager(activity)
recyclerview.setLayoutManager(layoutManager)
recyclerview.setHasFixedSize(true)
val adapter = MemberListAdapter(data)
recyclerview.setAdapter(adapter)

AddingGroup.kt #

class AddingGroup : Fragment() {
    //Declaring
    private lateinit var group_name : EditText
    private lateinit var member_email : EditText
    private lateinit var imageAdd1 : ImageView
    private lateinit var btn_submit : Button

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

    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        val view =  inflater.inflate(R.layout.fragment_adding_group, container, false)
        group_name = view.findViewById(R.id.group_name)
        member_email = view.findViewById(R.id.member_email)
        imageAdd1 = view.findViewById(R.id.imageAdd1)
        btn_submit = view.findViewById(R.id.btn_submit)
        val recyclerview = view.findViewById<RecyclerView>(R.id.memberRecyclerView)
        val layoutManager: RecyclerView.LayoutManager = LinearLayoutManager(activity)
        recyclerview.setLayoutManager(layoutManager)
        recyclerview.setHasFixedSize(true)
        //adding member email to array list
        val data = ArrayList<MemberList>()
        imageAdd1.setOnClickListener{
            data.add(MemberList(member_email.toString(), R.drawable.ic_remove_circle));
        }
        val adapter = MemberListAdapter(data)
        recyclerview.setAdapter(adapter)
        //adding group to firebase
        btn_submit.setOnClickListener {
            //
        }
        return view
    }
}

MemberListAdapter.kt #

class MemberListAdapter(private val member_list: ArrayList<MemberList>) : RecyclerView.Adapter<ViewHolder>()  {

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

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(parent.context)
            .inflate(R.layout.fragment_group_card, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val MemberList = member_list[position]

        // sets the image to the imageview from our itemHolder class
        holder.imageView.setImageResource(MemberList.removeBtn)

        // sets the text to the textview from our itemHolder class
        holder.textView.text = MemberList.memberEmail
    }

}

class ViewHolder(ItemView: View) : RecyclerView.ViewHolder(ItemView) {
    val imageView: ImageView = itemView.findViewById(R.id.removebtn)
    val textView: TextView = itemView.findViewById(R.id.usermail)
}

RecyclerView布局 #

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/memberRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="parent"
        app:layout_constraintVertical_bias="0.288"
        tools:ignore="MissingConstraints"
        tools:itemCount="5"
        tools:listitem="@layout/fragment_group_card"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>

fragment_group_card.xml #

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

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

            <TextView
                android:id="@+id/usermail"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:hint="UserName"
                android:textColor="#000000"
                android:textAppearance="@style/TextAppearance.AppCompat.Large"
                tools:layout_editor_absoluteX="16dp"
                tools:layout_editor_absoluteY="25dp" />

            <ImageView
                android:id="@+id/removebtn"
                android:layout_width="wrap_content"
                android:layout_height="25dp"
                app:srcCompat="@drawable/ic_remove_circle"
                tools:ignore="MissingConstraints"
                tools:layout_editor_absoluteX="350dp"
                tools:layout_editor_absoluteY="6dp" />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.cardview.widget.CardView>

</FrameLayout>

感谢各位的帮助！

内容的提问来源于stack exchange，提问作者Jayashree K