Android Material FAB With Badge Attached

activity_fab_with_badge.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:id="@+id/main_view">
  
    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/notifications_button"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="10dp"
        app:srcCompat="@drawable/ic_notifications_black_24dp"
        android:layout_margin="16dp" />

    <TextView
        android:layout_width="16dp"
        android:layout_height="16dp"
        android:elevation="16dp"
        android:gravity="center"
        android:text="2"
        android:background="@drawable/circulo"
        android:textColor="@color/grey"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="@id/notifications_button"
        app:layout_constraintEnd_toEndOf="@id/notifications_button"/>

</androidx.constraintlayout.widget.ConstraintLayout>

circulo.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
    <solid android:angle="270"
        android:color="@color/grey" />

</shape>