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/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/grey_background"
    tools:context=".MainActivity">

    <SeekBar
        android:id="@+id/blues"
        android:layout_width="350dp"
        android:layout_height="40dp"
        android:background="@drawable/blue_rectangle_bg"
        android:elevation="6dp"
        android:max="100"
        android:progressDrawable="@drawable/blue_seekbar_progress"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.491"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.571" />

    <SeekBar
        android:id="@+id/whites"
        android:layout_width="350dp"
        android:layout_height="40dp"
        android:background="@drawable/white_rectangle_bg"
        android:elevation="6dp"
        android:max="100"
        android:progressDrawable="@drawable/white_seekbar_progress"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.491"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.707" />

    <!-- RadioGroup for RadioButtons -->
    <TextView
        android:id="@+id/whitesValueText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="@string/whites_percentage_text"
        android:textSize="14sp"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="10dp"
        app:layout_constraintBottom_toTopOf="@+id/whites"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/blues"
        app:layout_constraintVertical_bias="1.0"
        android:background="@drawable/edit_text_border"
        android:textColor="@color/black"
        android:padding="6dp" />

    <RadioGroup
        android:id="@+id/modeGroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:orientation="horizontal"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/whites">

        <RadioButton
            android:id="@+id/manualBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="6dp"
            android:layout_marginBottom="8dp"
            android:background="@drawable/blue_rectangle_bg"
            android:elevation="6dp"
            android:padding="6dp"
            android:radius="8dp"
            android:singleLine="true"
            android:text="@string/manual_mode"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.894"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/whites"
            app:layout_constraintVertical_bias="0.057" />

        <RadioButton
            android:id="@+id/autoBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="6dp"
            android:layout_marginBottom="8dp"
            android:background="@drawable/blue_rectangle_bg"
            android:elevation="6dp"
            android:padding="6dp"
            android:radius="8dp"
            android:text="@string/auto_mode"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.096"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/whites"
            app:layout_constraintVertical_bias="0.057" />

    </RadioGroup>

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/power_on"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:elevation="6dp"
        android:focusable="true"
        android:padding="6dp"
        android:text="@string/power_on"
        android:textColor="@color/black"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.271"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.891" />

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/power_off"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:elevation="6dp"
        android:focusable="true"
        android:padding="6dp"
        android:text="@string/power_off"
        android:textColor="@color/black"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.759"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.891" />

    <Button
        android:id="@+id/scanBtn"
        android:layout_width="125dp"
        android:layout_height="60dp"
        android:elevation="6dp"
        android:radius="10dp"
        android:text="@string/scan_devices"
        android:layout_marginTop="10dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.902"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/selectedDevice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:background="@drawable/edit_text_border"
        android:elevation="6dp"
        android:padding="8dp"
        android:text="@string/no_device_selected"
        android:textColor="@color/black"
        android:textSize="20sp"
        app:layout_constraintBottom_toTopOf="@+id/blues"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>