activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.widget.LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/lbl_track_screen"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Track screen"
        android:textColor="@android:color/holo_red_light"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Switch
        android:id="@+id/entered_exited_screen_track_switch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:showText="true"
        android:splitTrack="false"
        android:text="Tipo di evento"
        android:textOff="EXITED"
        android:textOn="ENTERED"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_send_screen_track_event"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onBtnScreenEventTrack"
        android:text="Invia screen track event" />

    <TextView
        android:id="@+id/lbl_user_prefs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="User preferences"
        android:textColor="@android:color/holo_red_light"
        android:textSize="24sp" />

    <Switch
        android:id="@+id/pref_bool_switch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:showText="true"
        android:splitTrack="false"
        android:text="PrefBool"
        android:textOff="false"
        android:textOn="true"
        android:textSize="18sp" />

    <Switch
        android:id="@+id/pref_int_switch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:showText="true"
        android:splitTrack="false"
        android:text="PrefInt"
        android:textOff="1"
        android:textOn="2"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_send_pref_changes"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onBtnUserPrefChanges"
        android:text="Invia pref changes" />

</android.widget.LinearLayout>