SIMPLEST APPROACH:

Create an xml file rounded_fg.xml under res/drawable/ folder of your app. The content of rounded_fg.xml is as follows,

<?xml version="1.0" encoding="UTF-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:innerRadiusRatio="2"    android:shape="ring"    android:thicknessRatio="1"    android:useLevel="false">    <gradient        android:type="radial"        android:gradientRadius="8dp"        android:endColor="@color/white"       /></shape>

You can match endColor with ImageView container layout background & gradientRadius may be any value as per your requirements (<=36dp).

Now use this drawable as foreground for your imageview as follows,

 <ImageView     android:layout_width="55dp"     android:layout_height="55dp"      android:foreground="@drawable/rounded_fg" />

Works perfect with square images and/or imageview.

Square Image/ImageView:

Rectangular Image/ImageView:

Foreground applied over a button:

I use Universal Image loader library to download and round the corners of image, and it worked for me.

ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(thisContext)            // You can pass your own memory cache implementation           .discCacheFileNameGenerator(new HashCodeFileNameGenerator())           .build();DisplayImageOptions options = new DisplayImageOptions.Builder()            .displayer(new RoundedBitmapDisplayer(10)) //rounded corner bitmap            .cacheInMemory(true)            .cacheOnDisc(true)            .build();ImageLoader imageLoader = ImageLoader.getInstance();imageLoader.init(config);imageLoader.displayImage(image_url,image_view, options );

Now we no need to use any third party lib or custom imageView

Now We can use ShapeableImageView

SAMPLE CODE

First add below dependencies in your build.gradle file

implementation 'com.google.android.material:material:1.2.0-alpha05'

Make ImageView Circular from coding

Add ShapeableImageView in your layout

<com.google.android.material.imageview.ShapeableImageView    android:id="@+id/myShapeableImageView"    android:layout_width="100dp"    android:layout_height="100dp"    android:layout_margin="20dp"    app:layout_constraintBottom_toBottomOf="parent"    app:layout_constraintLeft_toLeftOf="parent"    app:layout_constraintRight_toRightOf="parent"    app:layout_constraintTop_toTopOf="parent"    app:srcCompat="@drawable/nilesh" />

Kotlin code to make ImageView Circle

import androidx.appcompat.app.AppCompatActivityimport android.os.Bundleimport com.google.android.material.shape.CornerFamilyimport kotlinx.android.synthetic.main.activity_main.*class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_main)//        <dimen name="image_corner_radius">50dp</dimen>        val radius = resources.getDimension(R.dimen.image_corner_radius)        myShapeableImageView.shapeAppearanceModel = myShapeableImageView.shapeAppearanceModel            .toBuilder()            .setTopRightCorner(CornerFamily.ROUNDED, radius)            .setTopLeftCorner(CornerFamily.ROUNDED, radius)            .setBottomLeftCorner(CornerFamily.ROUNDED, radius)            .setBottomRightCorner(CornerFamily.ROUNDED, radius)            .build()            // or  You can use setAllCorners() method        myShapeableImageView.shapeAppearanceModel = myShapeableImageView.shapeAppearanceModel            .toBuilder()            .setAllCorners(CornerFamily.ROUNDED, radius)            .build()    }}

OUTPUT

Make ImageView Circle from using a style

First, create a below style in your style.xml

<style name="circleImageViewStyle" >    <item name="cornerFamily">rounded</item>    <item name="cornerSize">50%</item></style>

Now use that style in your layout like this

<com.google.android.material.imageview.ShapeableImageView    android:id="@+id/myShapeableImageView"    android:layout_width="100dp"    android:layout_height="100dp"    android:layout_margin="20dp"    app:shapeAppearanceOverlay="@style/circleImageViewStyle"    app:srcCompat="@drawable/nilesh" />

OUTPUT

Please find the complete exmaple here how to use ShapeableImageView