为什么在LinearLayoutManager RecyclerView中使用KOTLIN选择方向时会发生此错误

Question

On Fragment file:
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
recycle_home.layoutManager = LinearLayoutManager( this.context , LinearLayout.VERTICAL ,false )
recycle_home.adapter = adapter_home()
}

在此处输入图像描述

Answer 1

override fun onActivityCreated(savedInstanceState: Bundle?) { super.onActivityCreated(savedInstanceState)
recycle_home.layoutManager = LinearLayoutManager( this.context)
recycle_home.adapter = adapter_home()
}

或

override fun onActivityCreated(savedInstanceState: Bundle?) { super.onActivityCreated(savedInstanceState)
recycle_home.layoutManager = LinearLayoutManager( this.context,RecyclerView.VERTICAL,false)
recycle_home.adapter = adapter_home()
}

Answer 2

如果您尝试将布局管理器添加到RecyclerView，则可以将其添加到xml本身中

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/emailsRV"
android:layout_width="0dp"
android:layout_height="0dp"
android:adapter="@{adapter}"
android:layoutAnimation="@anim/layout_animation_from_bottom"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toTopOf="@id/addNewACB"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:listitem="@layout/item_phone" />

然后，如果要添加方向，可以将其分段添加，甚至可以为其创建BindingAdapter

。下面是片段/活动的代码

recycle_home.addItemDecoration(DividerItemDecoration(context, LinearLayoutManager.VERTICAL))