Pasek aplikacji na czat trzepot

return Scaffold(
      appBar: AppBar(
        elevation: 0,
        automaticallyImplyLeading: false,
        backgroundColor: Colors.white,
        flexibleSpace: SafeArea(
          child: Container(
            padding: EdgeInsets.only(right: 16),
            child: Row(
              children: <Widget>[
                IconButton(
                  onPressed: (){
                    Navigator.pop(context);
                  },
                  icon: Icon(Icons.arrow_back,color: Colors.black,),
                ),
                SizedBox(width: 2,),
                CircleAvatar(
                  backgroundImage: NetworkImage("<https://randomuser.me/api/portraits/men/5.jpg>"),
                  maxRadius: 20,
                ),
                SizedBox(width: 12,),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      Text("Kriss Benwat",style: TextStyle( fontSize: 16 ,fontWeight: FontWeight.w600),),
                      SizedBox(height: 6,),
                      Text("Online",style: TextStyle(color: Colors.grey.shade600, fontSize: 13),),
                    ],
                  ),
                ),
                Icon(Icons.settings,color: Colors.black54,),
              ],
            ),
          ),
        ),
      ),
      body: Container()
    );
Said HR