直接上代码：下面代码如果放到列表里，实现了选择和不选的按钮效果，index是按钮的索引。

Widget _getTabWidget(int index){

    BoxDecoration boxDecorationTabNormal = BoxDecoration(
      color: Color(0xff818DFF),
      //border: Border.all(width: 0.5, style: BorderStyle.solid,color: Color(0xffefefef)),
      //borderRadius: BorderRadius.horizontal(right: Radius.circular(5))
    );
    BoxDecoration boxDecorationTabSelected = BoxDecoration(
      color: Color(0xff3446F2),
      //border: Border.all(width: 0.5, style: BorderStyle.solid,color: Color(0xffffffff)),
      //borderRadius: BorderRadius.horizontal(right: Radius.circular(5))
    );

    return new Container(

      child: GestureDetector(
          child: new Container(
            width: 90,
            height: 40,
            margin: EdgeInsets.only(left:10),
            decoration: this._selectedDateTabIndex == index ? boxDecorationTabSelected : boxDecorationTabNormal,
            child:Row(
              mainAxisAlignment:MainAxisAlignment.center,
              children: [
                Padding(
                    padding: EdgeInsets.only(top:5,left: 5,right: 5,bottom: 5),
                    child: Text(
                      _tabButtonList.elementAt(index),
                      textAlign:TextAlign.center,
                      style: TextStyle(
                        color: Color(0xffffffff) ,
                        fontSize: 16,
                      ),
                    )
                ),
              ]
            )
          ),
          onTap:(){
            setState(() {
              _selectedDateTabIndex = index;
            });
            this._updateList(_selectedTypeTabIndex);
          }
      ),
    );
  }