title: Is there a screen problem with stack in flutter
body: <p>My problem is because
  <a href="https://i.stack.imgur.com/U6OLV.png" rel="nofollow noreferrer">I have a image at the top of the screen and under the image is the rest of body scaffold, but that has a rounded corners </a></p>
  
  <p>I used the Stack with positioned to appbar floating and transparent, the container below appbar, but I can't do the rounded corners of the container with this stack, this is what I'm doing</p>
  
  <pre class="lang-dart prettyprint-override"><code>Scaffold(
      body: Stack(
          children: &lt;Widget&gt;[
              SingleChildScrollView(
                  child: ...
              )
              Positioned(
                  top: 0.0,
                  left: 0.0,
                  right: 0.0,
                  child: AppBar(
                      ...
                  ),
              ),
          ],
      ),
  )
  </code></pre>
  
  <p>After tried this, I could not do this container with rounded corners and <a href="https://i.stack.imgur.com/PorBQ.png" rel="nofollow noreferrer">I got this</a></p>