activity_style.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"
    android:background="#ECF0F3"
    tools:context=".ActivityStyle">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="drop shadow"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="@+id/btn35"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/btn35"
        app:layout_constraintTop_toTopOf="@+id/btn35" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="small inner shadow"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="@+id/btn36"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/btn36"
        app:layout_constraintTop_toTopOf="@+id/btn36" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="big inner shadow"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="@+id/btn37"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/btn37"
        app:layout_constraintTop_toTopOf="@+id/btn37" />

    <TextView
        android:id="@+id/header"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:lines="2"
        android:text="shape_circle_shadow_type="
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.github.sshadkany.shapes.CircleView
        android:id="@+id/btn35"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_margin="5dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/header"
        app:shape_circle_backgroundColor="#ECF0F3"
        app:shape_circle_shadow_type="drop_shadow" />

    <com.github.sshadkany.shapes.CircleView
        android:id="@+id/btn36"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_margin="5dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/btn35"
        app:shape_circle_backgroundColor="#ECF0F3"
        app:shape_circle_shadow_type="small_inner_shadow" />

    <com.github.sshadkany.shapes.CircleView
        android:id="@+id/btn37"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_margin="5dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/btn36"
        app:shape_circle_backgroundColor="#ECF0F3"
        app:shape_circle_shadow_type="big_inner_shadow" />


</androidx.constraintlayout.widget.ConstraintLayout>