activity_splash.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimaryDark">
    
    <com.github.ybq.android.spinkit.SpinKitView
        android:id="@+id/sk_progress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@style/SpinKitView.Large.Wave"
        android:layout_centerInParent="true" />

</RelativeLayout>