MainAxisAlignment

CrossAxisAlignment

Row(
  mainAxisAlignment: MainAxisAlignment.center,
  mainAxisSize: MainAxisSize.max,
  crossAxisAlignment: CrossAxisAlignment.center,
  children: [
  Container(
    padding: const EdgeInsets.all(0.0),
    color: Colors.cyanAccent,
    width: 80.0,
    height: 80.0,
  ),
  Container(
    padding: const EdgeInsets.all(0.0),
    color: Colors.blueAccent,
    width: 80.0,
    height: 80.0,
  ),
  Container(
    padding: const EdgeInsets.all(0.0),
    color: Colors.orangeAccent,
    width: 80.0,
    height: 80.0,
  ),
  ],
),