TrafficSim/app/src/main/res/layout/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:id="@+id/constr_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <View
            android:id="@+id/divider3"
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="?android:attr/listDivider" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingTop="8dp"
            android:paddingBottom="8dp">

            <TextView
                android:id="@+id/textView4"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Track length" />

            <SeekBar
                android:id="@+id/trackLengthSeekBar"
                style="@android:style/Widget.Material.SeekBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:max="250"
                android:min="1"
                android:progress="50" />

            <TextView
                android:id="@+id/textView3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Number of vehicles" />

            <SeekBar
                android:id="@+id/noOfVehiclesSeekBar"
                style="@style/Widget.AppCompat.SeekBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:max="250"
                android:min="1"
                android:progress="3" />

            <TextView
                android:id="@+id/textView5"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Maximum velocity" />

            <SeekBar
                android:id="@+id/maxVelocitySeekBar"
                style="@style/Widget.AppCompat.SeekBar.Discrete"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:max="10"
                android:progress="3" />

            <TextView
                android:id="@+id/textView6"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Brake probability" />

            <SeekBar
                android:id="@+id/brakeProbabilitySeekBar"
                style="@style/Widget.AppCompat.SeekBar.Discrete"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:max="20"
                android:min="0"
                android:progress="6" />

        </LinearLayout>

        <View
            android:id="@+id/divider"
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="?android:attr/listDivider" />

        <TableLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="8dp"
            android:paddingBottom="8dp">

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Average velocity (overall):" />

                <TextView
                    android:id="@+id/avgVeloOverallView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />
            </TableRow>

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/textView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Average velocity (last step):" />

                <TextView
                    android:id="@+id/avgVeloLastView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </TableRow>

        </TableLayout>

        <View
            android:id="@+id/divider2"
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="?android:attr/listDivider" />

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingTop="8dp"
            android:paddingBottom="8dp">

            <LinearLayout
                android:id="@+id/trackViewStack"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:orientation="vertical"
                app:layout_constraintBottom_toTopOf="@+id/linearLayout"
                app:layout_constraintTop_toTopOf="parent"
                tools:layout_editor_absoluteX="8dp">

            </LinearLayout>

            <LinearLayout
                android:id="@+id/linearLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:paddingTop="8dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="@+id/playButton">

                <Button
                    android:id="@+id/playButton"
                    style="@style/Widget.AppCompat.Button.Borderless"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:onClick="onPlayButtonClick"
                    android:text="Play" />

                <Button
                    android:id="@+id/stepButton"
                    style="@style/Widget.AppCompat.Button.Borderless"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:onClick="onStepButtonClick"
                    android:text="Step" />

                <Button
                    android:id="@+id/stopButton"
                    style="@style/Widget.AppCompat.Button.Borderless"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:enabled="false"
                    android:onClick="onStopButtonClick"
                    android:text="Stop" />

            </LinearLayout>

        </androidx.constraintlayout.widget.ConstraintLayout>

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>