?全局搜索找到_PaintMetrics类的_calculateMetrics()方法，将
_pixelSize = (pixelSize * 2).roundToDouble() / 2;
这一行代码注释掉，然后添加_pixelSize = pixelSize这行代码，完整代码如下：
class _PaintMetrics {
? _PaintMetrics({
? ? required this.containerSize,
? ? required this.gapSize,
? ? required this.moduleCount,
? }) {
? ? _calculateMetrics();
? }
? final int moduleCount;
? final double containerSize;
? final double gapSize;
? late final double _pixelSize;
? double get pixelSize => _pixelSize;
? late final double _innerContentSize;
? double get innerContentSize => _innerContentSize;
? late final double _inset;
? double get inset => _inset;
? void _calculateMetrics() {
? ? final gapTotal = (moduleCount - 1) * gapSize;
? ? final pixelSize = (containerSize - gapTotal) / moduleCount;
? ? // _pixelSize = (pixelSize * 2).roundToDouble() / 2; ?// 注释掉这行
? ? _pixelSize = pixelSize; // 添加这行代码，将pixelSize 直接赋值给_pixelSize?
? ? _innerContentSize = (_pixelSize * moduleCount) + gapTotal;
? ? _inset = (containerSize - _innerContentSize) / 2;
? }
}