<?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=".SettingsActivity">

    <TextView
        android:id="@+id/textEnd"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical|center_horizontal"
        android:text="End Time"
        android:textSize="20sp"
        app:layout_constraintBottom_toTopOf="@+id/timePicker"
        app:layout_constraintTop_toTopOf="parent" />

    <TimePicker
        android:id="@+id/timePicker"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:timePickerMode="clock"
        app:layout_constraintBottom_toTopOf="@+id/btnReset"
        app:layout_constraintTop_toBottomOf="@+id/textEnd" />

    <Button
        android:id="@+id/btnReset"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Reset"
        android:textSize="30sp"
        app:layout_constraintBottom_toTopOf="@+id/lblPeriod"
        app:layout_constraintTop_toBottomOf="@+id/timePicker" />

    <Button
        android:id="@+id/btnStart"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="Start"
        android:textSize="40sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/cbDimScreen" />


    <NumberPicker
        android:id="@+id/periodPicker"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:gravity="fill_horizontal"
        app:layout_constraintBottom_toTopOf="@+id/cbDimScreen"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/lblPeriod"
        app:layout_constraintTop_toBottomOf="@+id/btnReset" />

    <TextView
        android:id="@+id/lblPeriod"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center_vertical|center_horizontal"
        android:text="Update Period (seconds):"
        android:textSize="25sp"
        app:layout_constraintBottom_toTopOf="@+id/cbDimScreen"
        app:layout_constraintEnd_toStartOf="@+id/periodPicker"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnReset" />

    <CheckBox
        android:id="@+id/cbDimScreen"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="right|center"
        android:layoutDirection="rtl"
        android:text="Dim Screen?  "
        android:textColor="#ffC1C1C1"
        android:textSize="25sp"
        app:layout_constraintBottom_toTopOf="@+id/btnStart"


        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/lblPeriod" />


</androidx.constraintlayout.widget.ConstraintLayout>