Remove padding ListView flutter

I am just doing some demos of flutter, I love to do it, In listview, I cant find out that how to remove space between rows

my code is pretty simple, This one is Widget which I return to my layout

Widget _getWidget[BuildContext context] { return new Material[ child: new Container[ padding: EdgeInsets.only[top: 20.0], color: Colors.blueGrey[500], child: new Column[ crossAxisAlignment: CrossAxisAlignment.start, children: [ _getHeader[context], new Expanded[child: getListView[]] ], ], ], ];

}

This one is Listview

ListView getListView[] => new ListView.builder[ itemCount: widgets.length, itemBuilder: [BuildContext context, int position] { return getRow[position]; }];

This one is row which i use card view

Help Me.