CIRCULAR IMAGE VIEW ANDROID

All you need is to wrap your ImageView inside a frame layout.Then set the background to the FrameLayout as a custom drawable.

<FrameLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    android:layout_gravity="center_horizontal"
    android:background="@drawable/circle_background"
    android:padding="20dp">
    <!--Circular Image View-->
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_user"
        />

</FrameLayout>

The code to the custom background:

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

    <stroke
        android:width="1dp"
        android:color="#FFFFFF"/>
    </shape>