Paint a circular image with border : <p>I want to do something like </p>

<pre><code>new BoxDecoration(
        color: const Color(0xff7c94b6),
        image: new DecorationImage(
          image: new ExactAssetImage('assets/images/restaurant.jpg'),
          fit: BoxFit.cover,
        ),
        borderRadius: new BorderRadius.all(new Radius.circular(50.0)),
        border: new Border.all(
          color: Colors.red,
          width: 4.0,

        ),
</code></pre>

<p>The visual I am looking for is like the way gmail shows the user's image. This code - which is from the docs - works fine, but my image should be loaded from a url, and is not in the assets.</p>
