如何更改material 按钮的字体大小.有没有更好的方法来做这件事?
new MaterialButton(
height: 140.0,
minWidth: double.infinity,
color: Theme.of(context).primaryColor,
textColor: Colors.white,
child: new Text("material button"),
onPressed: () => {},
splashColor: Colors.redAccent,
),