Flutter实现仿京东地址选择组件

Flutter实现仿京东地址选择组件,省市区三级级联选择器,数据为模拟数据,可根据真实接口数据改造,也可扩展成为省市区街道四级选择,
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效果图如下:

主要实现代码如下:
// 省TabView
_provinceTabView() {

return ListView.builder(
    itemBuilder: (BuildContext context, int index) {
      return InkWell(
          onTap: () => areaChange(0, index),
          child: _nameBar(provinceList[index]['name'], provinceActive == index));
    },
    itemCount: provinceList.length);

}

// 市
_cityTabView() {

return ListView.builder(
    itemBuilder: (BuildContext context, int index) {
      return InkWell(
          onTap: () => areaChange(1, index),
          child: _nameBar(
              provinceList[provinceActive]['city'][index]['name'], cityActive == index));
    },
    itemCount: provinceList[provinceActive]['city'].length);

}

// 区县
_areaTabView() {

return ListView.builder(
    itemBuilder: (BuildContext context, int index) {
      return InkWell(
          onTap: () => areaChange(2, index),
          child: _nameBar(
              provinceList[provinceActive]['city'][cityActive]['area'][index]['name'],
              areaActive == index));
    },
    itemCount: provinceList[provinceActive]['city'][cityActive]['area'].length);

}