GG/android/UDPtest000/app/src/main/res/layout-land/activity_main.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="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/r2b"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:text="R2"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline2"
        app:layout_constraintEnd_toStartOf="@+id/guideline12"
        app:layout_constraintStart_toStartOf="@+id/guideline11"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/r1b"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="R1"
        android:textSize="24sp"
        app:layout_constraintEnd_toStartOf="@+id/guideline17"
        app:layout_constraintStart_toStartOf="@+id/guideline16"
        app:layout_constraintTop_toBottomOf="@+id/r2b" />

    <Button
        android:id="@+id/start"
        android:layout_width="50dp"
        android:layout_height="25dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="Start"
        android:textSize="20sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline7"
        app:layout_constraintEnd_toStartOf="@+id/guideline10"
        app:layout_constraintTop_toTopOf="@+id/guideline6" />

    <Button
        android:id="@+id/leftb2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="←"
        android:textSize="34sp"
        app:cornerRadius="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline14"
        app:layout_constraintEnd_toStartOf="@+id/guideline4"
        app:layout_constraintStart_toStartOf="@+id/guideline5"
        app:layout_constraintTop_toTopOf="@+id/guideline13" />

    <Button
        android:id="@+id/downb2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="↓"
        android:textAppearance="@style/TextAppearance.AppCompat.Small"
        android:textSize="34sp"
        app:cornerRadius="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline7"
        app:layout_constraintEnd_toStartOf="@+id/guideline3"
        app:layout_constraintStart_toStartOf="@+id/guideline4"
        app:layout_constraintTop_toTopOf="@+id/guideline14" />

    <Button
        android:id="@+id/upb2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="↑"
        android:textSize="34sp"
        app:cornerRadius="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline13"
        app:layout_constraintEnd_toStartOf="@+id/guideline3"
        app:layout_constraintStart_toStartOf="@+id/guideline4"
        app:layout_constraintTop_toTopOf="@+id/guideline6" />

    <Button
        android:id="@+id/rightb2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="→"
        android:textSize="34sp"
        app:cornerRadius="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline14"
        app:layout_constraintEnd_toStartOf="@+id/guideline8"
        app:layout_constraintStart_toStartOf="@+id/guideline3"
        app:layout_constraintTop_toTopOf="@+id/guideline13" />

    <Button
        android:id="@+id/leftb"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="X"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline14"
        app:layout_constraintEnd_toStartOf="@+id/guideline16"
        app:layout_constraintStart_toStartOf="@+id/guideline11"
        app:layout_constraintTop_toTopOf="@+id/guideline13" />

    <Button
        android:id="@+id/upb"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="Y"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline13"
        app:layout_constraintEnd_toStartOf="@+id/guideline17"
        app:layout_constraintStart_toStartOf="@+id/guideline16"
        app:layout_constraintTop_toTopOf="@+id/guideline6" />

    <Button
        android:id="@+id/select"
        android:layout_width="50dp"
        android:layout_height="25dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="Start"
        android:textSize="20sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline7"
        app:layout_constraintStart_toStartOf="@+id/guideline9"
        app:layout_constraintTop_toTopOf="@+id/guideline6" />

    <Button
        android:id="@+id/downb"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="A"
        android:textAppearance="@style/TextAppearance.AppCompat.Small"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline7"
        app:layout_constraintEnd_toStartOf="@+id/guideline17"
        app:layout_constraintStart_toStartOf="@+id/guideline16"
        app:layout_constraintTop_toTopOf="@+id/guideline14" />

    <Button
        android:id="@+id/rightb"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:insetTop="0dp"
        android:insetBottom="0dp"
        android:text="B"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline14"
        app:layout_constraintEnd_toStartOf="@+id/guideline12"
        app:layout_constraintStart_toStartOf="@+id/guideline17"
        app:layout_constraintTop_toTopOf="@+id/guideline13" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.045143638" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.38" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.93" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.3515732" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.4" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.6" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.6497948" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.96" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.18" />

    <Button
        android:id="@+id/l2b"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:text="L2"
        android:textSize="24sp"
        app:layout_constraintBottom_toTopOf="@+id/guideline2"
        app:layout_constraintEnd_toStartOf="@+id/guideline8"
        app:layout_constraintHorizontal_bias="0.455"
        app:layout_constraintStart_toStartOf="@+id/guideline5"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/l1b"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="L1"
        android:textSize="24sp"
        app:layout_constraintEnd_toStartOf="@+id/guideline3"
        app:layout_constraintStart_toStartOf="@+id/guideline4"
        app:layout_constraintTop_toTopOf="@+id/guideline2" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.25" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.15" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline13"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.56" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline14"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.75" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline16"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.75" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline17"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.85499316" />

</androidx.constraintlayout.widget.ConstraintLayout>