mihon/app/src/main/res/layout/pref_spinner.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"
    android:layout_width="match_parent"
    android:layout_height="?attr/listPreferredItemHeightSmall"
    android:background="?attr/selectableItemBackground"
    android:paddingStart="16dp"
    android:paddingEnd="16dp">

    <com.google.android.material.textview.MaterialTextView
        android:id="@+id/title"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="1"
        android:paddingEnd="8dp"
        android:textColor="?android:attr/textColorSecondary"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/center_guideline"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="Title" />

    <com.google.android.material.textview.MaterialTextView
        android:id="@+id/details"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:maxLines="1"
        android:textColor="?android:attr/textColorPrimary"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/dropdown_caret"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toEndOf="@+id/center_guideline"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="Details" />

    <ImageView
        android:id="@+id/dropdown_caret"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_marginStart="1dp"
        android:src="@drawable/ic_expand_more_24dp"
        app:layout_constraintBottom_toBottomOf="@id/details"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/details"
        app:tint="?android:attr/colorControlNormal"
        tools:ignore="ContentDescription" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/center_guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.5" />

</androidx.constraintlayout.widget.ConstraintLayout>