如何使Groupie 2x2布局

implementation 'com.xwray:groupie:2.9.0'

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
    app:spanCount="2" />

val items = listOf(
    Item("Item 1"),
    Item("Item 2"),
    Item("Item 3"),
    Item("Item 4")
)

<!-- item_layout.xml -->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/itemText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

class ItemViewHolder(itemView: View) : GroupieViewHolder(itemView) {
    private val itemText: TextView = itemView.findViewById(R.id.itemText)

    fun bind(item: Item) {
        itemText.text = item.text
    }
}

class Item(val text: String) : Item<GroupieViewHolder>() {
    override fun getLayout(): Int {
        return R.layout.item_layout
    }

    override fun createViewHolder(itemView: View): GroupieViewHolder {
        return ItemViewHolder(itemView)
    }

    override fun bind(viewHolder: GroupieViewHolder, position: Int) {
        (viewHolder as ItemViewHolder).bind(this)
    }
}

val adapter = GroupAdapter<GroupieViewHolder>().apply {
    addAll(items)
}

val recyclerView: RecyclerView = findViewById(R.id.recyclerView)
recyclerView.apply {
    layoutManager = GridLayoutManager(this@MainActivity, 2)
    adapter = adapter
}