Flutter基础widgets教程-FloatingActionButton篇

FloatingActionButton({
   Key key,
   this.child,
   this.tooltip,
   this.foregroundColor,
   this.backgroundColor,
   this.heroTag = const _DefaultHeroTag(),
   this.elevation = 6.0,
   this.highlightElevation = 12.0,
   @required this.onPressed,
   this.mini = false,
   this.shape = const CircleBorder(),
   this.clipBehavior = Clip.none,
   this.materialTapTargetSize,
   this.isExtended = false,
})

child:Text("Flutter Demo"),

tooltip: "按这么长时间干嘛",

foregroundColor: Colors.red,

backgroundColor: Colors.red,

mini: true,

elevation: 6.0,

highlightElevation: 12.0,