title: Why won't the border radius change?
body: <p>What am I doing wrong? I can't get the border radius of my card to change. The elevation isn't working either. I'm new at this. What do I need to change? Is it because it's in ListView? I'm confused. If you need for information, just ask. Sorry it wants me to write more... too much code?</p>
  <pre><code>class Home extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
  return DefaultTabController(
          length: 3,
          child: Scaffold(
              appBar: PreferredSize(
                preferredSize: Size.fromHeight(85),
                child: AppBar(
                  backgroundColor: Color(),
                  bottom: TabBar(
                    tabs: &lt;Widget&gt;[
                      Tab(icon: Icon(Icons.people), text: (''),),
                      Tab(icon: Icon(Icons.person), text: (''),),
                      Tab(icon: Icon(Icons.circle), text: (''),),
                    ],
                  ),
                ),
              ),
  
              body: ListView(
                children: &lt;Widget&gt;[
                  Card(
                    margin: EdgeInsets.all(10),
                    elevation: 8.0,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(24),
                    ),
                    child: Container(
                      color: Colors.white,
                      height: 120,
                      child: Column(
                        children: &lt;Widget&gt;[
                          ListTile(
                            leading: CircleAvatar(backgroundImage:
  NetworkImage(''),backgroundColor: Color(),),
                            title: Text('', style: TextStyle(color: Color ()),
                            subtitle: Text(
                              '', style: TextStyle(color: Color()),),),
                          Divider(
                            height: 10),
  
                          Row(
                            mainAxisAlignment: MainAxisAlignment.spaceAround,
                            children: &lt;Widget&gt;[
                              Row(
                                children: &lt;Widget&gt;[
                                  Icon(Icons.add, color: Color()),
                                  SizedBox(width: 8.0),
                                  Text('', style: TextStyle(color: Color()),
                                  ),
                                ],
                              ),
                              Row(
                                children: &lt;Widget&gt;[
                                  Icon(Icons.comment, color: Color()),
                                  SizedBox(width: 8.0),
                                  Text('', style: TextStyle(color: Color())),
                                ],
                              ),
                              Row(
                                children: &lt;Widget&gt;[
                                  Icon(Icons.bookmark, color: Color()),
                                  SizedBox(width: 8.0),
                                  Text('', style: TextStyle(color: Color()),),
                                ],
                              ),
                            ],
                          ),
                          SizedBox(height: 12.0,),
  </code></pre>