custom_app_bar_trial_1.dart

class ChatRoom extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFFECE5DD),
     
      appBar: AppBar(
        // leading: CircleAvatar(...), <-- remove this avatar
        title: Row(
          children: <Widget>[
            CircleAvatar(           // <-- avatar here instead
              radius: avatarRadius,
              child: chatItem.avatar,
            ),
            SizedBox(
              width: 8.0,
            ),
            Text(chatItem.name),
          ],
        ),
        actions: <Widget>[...]
      ),
     
      body: Column(...)
      
     // ...