NPS-Browser/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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activities.MainActivity">

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/tsvChooserButton"
        android:layout_width="52dp"
        android:layout_height="52dp"
        android:layout_marginStart="176dp"
        android:layout_marginEnd="176dp"
        android:layout_marginBottom="50dp"
        android:clickable="true"
        android:focusable="true"
        android:src="@drawable/ic_add_yellow_24dp"
        app:fabCustomSize="52dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:maxImageSize="32dp" />
</androidx.constraintlayout.widget.ConstraintLayout>