How to make blur effect?

Question

Java

Faced with the problem of creating a blur effect.

There is an activity:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="#FFFFFF"
    tools:context=".MainActivity">


    <android.support.constraint.ConstraintLayout
        android:id="@+id/group_807"
        android:layout_width="264dp"
        android:layout_height="374.77dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="327.23dp"
        android:layout_marginEnd="66dp"
        android:layout_marginStart="45dp"
        android:layout_marginTop="200dp"
        android:background="#00000000"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/ellipse_265"
        android:layout_width="160.7dp"
        android:layout_height="160.7dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="214.7dp"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="103.3dp"
        android:layout_marginTop="0dp"
        android:background="@drawable/ellipse_265"
        app:layout_constraintBottom_toBottomOf="@+id/group_807"
        app:layout_constraintEnd_toEndOf="@+id/group_807"
        app:layout_constraintStart_toStartOf="@+id/group_807"
        app:layout_constraintTop_toTopOf="@+id/group_807" />

    <View
        android:id="@+id/ellipse_262"
        android:layout_width="114.78dp"
        android:layout_height="114.78dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="121.67dp"
        android:layout_marginEnd="149.22dp"
        android:layout_marginStart="0dp"
        android:layout_marginTop="138.31dp"
        android:background="@drawable/ellipse_262"
        app:layout_constraintBottom_toBottomOf="@+id/group_807"
        app:layout_constraintEnd_toEndOf="@+id/group_807"
        app:layout_constraintStart_toStartOf="@+id/group_807"
        app:layout_constraintTop_toTopOf="@+id/group_807" />

    <View
        android:id="@+id/ellipse_264"
        android:layout_width="160.7dp"
        android:layout_height="160.7dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="0dp"
        android:layout_marginEnd="88.96dp"
        android:layout_marginStart="14.35dp"
        android:layout_marginTop="214.07dp"
        android:background="@drawable/ellipse_264"
        app:layout_constraintBottom_toBottomOf="@+id/group_807"
        app:layout_constraintEnd_toEndOf="@+id/group_807"
        app:layout_constraintStart_toStartOf="@+id/group_807"
        app:layout_constraintTop_toTopOf="@+id/group_807" />

    <View
        android:id="@+id/ellipse_263"
        android:layout_width="114.78dp"
        android:layout_height="114.78dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="56.69dp"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="149.22dp"
        android:layout_marginTop="200.3dp"
        android:background="@drawable/ellipse_263"
        app:layout_constraintBottom_toBottomOf="@+id/group_807"
        app:layout_constraintEnd_toEndOf="@+id/group_807"
        app:layout_constraintStart_toStartOf="@+id/group_807"
        app:layout_constraintTop_toTopOf="@+id/group_807" />

</android.support.constraint.ConstraintLayout>

You need to apply blur to get something like this:



How can I implement this task? Perhaps with the help of some library?