appbar.dart

AppBar(
          elevation: 0.0,
          backgroundColor: Theme.of(context).primaryColorDark,
   //leading icon
          leading: Icon(
            CupertinoIcons.back,
            color: Theme.of(context).accentColor,
          ),
  // wrapped title in column 
          title: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              Text(
                "Fruits Cake",
                style: TextStyle(
                    fontSize: 22.0, color: Colors.white, letterSpacing: 2.0),
              ),
              Text(
                "Strawberry and Kiwi Special",
                style: TextStyle(
                    color: Theme.of(context).primaryColor,
                    fontSize: 13.0,
                    letterSpacing: 3.0),
              )
            ],
          ),
  // favorite column
          actions: <Widget>[
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Icon(Icons.favorite_border,
                  color: Theme.of(context).accentColor),
            )
          ],
        ),