activity_rect_button.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="com.github.sshadkany.android_neumorphic_test_app.RectButtonActivity"
    android:id="@+id/backgroundLayout">

    <com.github.sshadkany.RectButton
        android:id="@+id/rec_image_button"
        android:layout_width="match_parent"
        android:layout_height="200dp"

        app:shape_roundRect_bottomLeftRadius="100dp"
        app:shape_roundRect_bottomRightRadius="100dp"
        app:shape_roundRect_topRightRadius="100dp"
        app:shape_roundRect_topLeftRadius="100dp"

        app:shape_roundRect_backgroundColor="#303234"
        app:shape_roundRect_light_color="#66494949"
        app:shape_roundRect_dark_color="#66000000"

        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:padding="32dp"
            android:tint="#100F0F"
            app:srcCompat="@drawable/abc_vector_test" />

    </com.github.sshadkany.RectButton>

    <com.github.sshadkany.RectButton
        android:id="@+id/rec_text_button"
        android:layout_width="match_parent"
        android:layout_height="200dp"

        app:shape_roundRect_topRightRadius="60dp"
        app:shape_roundRect_bottomLeftRadius="60dp"

        app:shape_roundRect_backgroundColor="#303234"
        app:shape_roundRect_light_color="#66494949"
        app:shape_roundRect_dark_color="#66000000"

        app:layout_constraintBottom_toBottomOf="parent">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="TextView"
            android:textSize="30sp" />
    </com.github.sshadkany.RectButton>

</androidx.constraintlayout.widget.ConstraintLayout>