ConstraintLayout 作为 RecyclerView 项目

I use ConstraintLayout as RecyclerView物品。但现在存在一些问题，真机上显示的和预览中不一样

recyclerView的item布局如下：

<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/foreground_item_undo"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:orientation="horizontal"
    app:layout_constraintWidth_default="spread">

    <com.lsl.wordhelper.view.RoundBgTextView
        android:id="@+id/tv_item_icon"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginStart="8dp"
        android:gravity="center"
        android:padding="4dp"
        android:text="G"
        android:textColor="@android:color/white"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_item_explain"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="释义："
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="@id/tv_item_original"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_item_original"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:text="Good"
        android:textColor="@android:color/black"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@id/tv_item_explain"
        app:layout_constraintLeft_toRightOf="@id/tv_item_icon"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_item_translate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="很好"
        android:textColor="@android:color/black"
        android:textSize="16sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="@id/tv_item_original"
        app:layout_constraintTop_toBottomOf="@id/tv_item_explain" />

    <TextView
        android:id="@+id/tv_item_date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:gravity="right"
        android:text="2018/01/19"
        android:textColor="@color/text_color_date"
        app:layout_constraintBottom_toBottomOf="@id/tv_item_original"
        app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>

In Android Studio preview .

But on the phone

有什么问题？

更新适配器的 oncreateView ：

//view is what we return from onCreateViewHolder
view.apply {
    this.layoutParams = RecyclerView.LayoutParams(
    ViewGroup.LayoutParams.MATCH_PARENT,
    ViewGroup.LayoutParams.WRAP_CONTENT
    )
}

这总是有效的。