flutter 仿抖音直播间右上角的人数圆形背景

人数圆形背景

//给个最小宽度和最小高度
ConstrainedBox(
                constraints: const BoxConstraints(minWidth: 32,minHeight: 32),
                child: Container(
                //左右边距
                    padding: const EdgeInsets.fromLTRB(5, 0, 5, 0),
                    alignment: Alignment.center,
                    decoration: BoxDecorationUtil()
                        .setFillBoxDecoration(const Color(0x3F000000), 50.0),
                    child: Row(
                        mainAxisSize: MainAxisSize.min,
                        crossAxisAlignment: CrossAxisAlignment.center,
                        children: [
                          ContentCenterText(
                              '${onLineContributeList.length}',
                              10.0,
                              Colors.white)
                        ])),
              )