content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.lobothijau.carouselsederhana.MainActivity"
    tools:showIn="@layout/activity_main">

    <com.synnapps.carouselview.CarouselView
        android:id="@+id/carouselView"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        app:fillColor="#FFFFFFFF"
        app:pageColor="#00000000"
        app:radius="6dp"
        app:slideInterval="3000"
        app:strokeColor="#FF777777"
        app:strokeWidth="1dp"/>
    
</RelativeLayout>