flutter控件Material

是个没有实际效果的控件，也是个底层的控件,可以用来设置阴影，形状，阴影，颜色，文字格式等等

    this.type = MaterialType.canvas,
    this.elevation = 0.0,
    this.color,
    this.shadowColor = const Color(0xFF000000),
    this.textStyle,
    this.borderRadius,
    this.shape,
    this.borderOnForeground = true,
    this.clipBehavior = Clip.none,
    this.animationDuration = kThemeChangeDuration,

示例

new Material(
              color: Colors.blueAccent,
              shape: new BeveledRectangleBorder(//斜角矩形边框
                side:new BorderSide(
                  width: 1.0,
                  color: Colors.blueAccent,
                  style: BorderStyle.none,
                ),
                borderRadius:new BorderRadius.circular(10.0),
              ),
              child: new Container(
                padding: EdgeInsets.all(20.0),
                child: new Text('斜角矩形边框'),
              ),
            ),