Flutter tabbar set text background, do not delay

如果是监听indexto set the background color ,There will be a delay in switching colors,可以做以下操作

       TabBar(
                isScrollable: true,
                indicator: BoxDecoration(color: Colors.red,borderRadius: BorderRadius.circular(50)),//This one can set the color and rounded corners（The meaning of the indicator used as a background）
                labelColor: Colors.white,
                labelStyle:
                    const TextStyle(fontSize: 18, fontWeight: FontWeight.w500),
                labelPadding:
                    const EdgeInsets.only(left: 8, right: 8),
                unselectedLabelColor: const Color(0xFF1A1A1A),
                unselectedLabelStyle:
                    const TextStyle(fontSize: 18, fontWeight: FontWeight.w500),
                controller: _tabController,
                tabs: tabs.map((chose) {
    
                  return Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Container(
                            padding: const EdgeInsets.only(
                                left: 15, right: 15, top: 9, bottom: 9),//This is to set the length, width and height of the text background
                            child: Text(chose.title),
                          )
                        ],
                      );
                }).toList())