simplauncher/app/src/main/res/layout/customize_quick_buttons_fragment.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:id="@+id/customize_quick_buttons_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginStart="@dimen/margin_sides"
    android:layout_marginEnd="@dimen/margin_sides"
    android:layout_marginTop="@dimen/margin_top_small"
    tools:context=".ui.options.CustomizeQuickButtonsFragment">

    <ImageView
        android:id="@+id/customize_quick_buttons_fragment_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="@dimen/padding"
        android:paddingStart="0dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/ic_back"
        android:contentDescription="@string/content_description_back"
        tools:ignore="RtlSymmetry" />
    <TextView
        android:id="@+id/customize_quick_buttons_fragment_header"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:text="@string/options_fragment_customize_quick_buttons"
        android:textColor="?headerTextColor"
        android:textAppearance="@style/TextAppearance.AppCompat"
        android:textSize="@dimen/font_size_customize_title"
        app:layout_constraintStart_toEndOf="@id/customize_quick_buttons_fragment_back"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <ImageView
        android:id="@+id/customize_quick_buttons_fragment_left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/margin_sides_small"
        android:layout_marginBottom="@dimen/margin_bottom_small"
        android:padding="@dimen/padding"
        android:background="@layout/imageview_border"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/ic_call"
        tools:ignore="ContentDescription" />
    <ImageView
        android:id="@+id/customize_quick_buttons_fragment_center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="@dimen/margin_bottom_small"
        android:alpha="1"
        android:padding="@dimen/padding"
        android:background="@layout/imageview_border"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/customize_quick_buttons_fragment_right"
        app:layout_constraintStart_toEndOf="@+id/customize_quick_buttons_fragment_left"
        app:srcCompat="@drawable/ic_cog"
        tools:ignore="ContentDescription" />
    <ImageView
        android:id="@+id/customize_quick_buttons_fragment_right"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="@dimen/margin_sides_small"
        android:layout_marginBottom="@dimen/margin_bottom_small"
        android:padding="@dimen/padding"
        android:background="@layout/imageview_border"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@drawable/ic_photo_camera"
        tools:ignore="ContentDescription" />

</androidx.constraintlayout.widget.ConstraintLayout>