小编sli*_*lin的帖子

我给容器上色，上面有一个 linearGradient。

Container(
  padding: EdgeInsets.only(left: 7.0),
  decoration: BoxDecoration(
    border: Border.all(
      width: 1,
      color: Colors.black12,
    ),
    borderRadius: BorderRadius.all(
      Radius.circular(7.0)
    ),
    boxShadow: [
      BoxShadow(
        offset: Offset(1, 3),
        blurRadius: 5.0,
        color: Colors.grey,
      )
    ],
    gradient: LinearGradient(
      colors: [
        _changeColorBrightness(widget.item.color, 0.1),
        _changeColorBrightness(widget.item.color, -0.1),
      ],
    begin: Alignment.topLeft,
    end: Alignment.bottomRight,
    ),
  ),
),

为了获得渐变的颜色，我将两侧的颜色变亮/变暗：

Color _changeColorBrightness(Color color, double deltaValue) {
  HSVColor hsvColor = HSVColor.fromColor(color);
  double newValue = hsvColor.value + deltaValue;
  if (newValue < 0.0) {
    newValue = 0.0;
  } else if (newValue > 1.0) {
    newValue …