CircleAvatar

AssetImage

Create lib/assets folder and put image, in this example we use ic_launcher.png hereunder.

In pubspec.yaml, add image above in assets section.

  assets:
    - assets/ic_launcher.png

Add widget in page.

            CircleAvatar(
              radius: 50,
              backgroundImage: AssetImage('assets/ic_launcher.png'),
            ),

NetworkImage

Add widget in page.

            CircleAvatar(
              radius: 50,
              backgroundImage: NetworkImage(
                  'https://flutter.io/images/catalog-widget-placeholder.png'),
            ),

That’s all folks