flutter：如何实现ListView中的文字逐渐淡出？

I want to achieve the style like the picture. A ListView containing a few Container, and each container has some text. When scrolling the ListView, I want to gradually faded part of the content of the last Container. The last means the one displayed in the bottom of the ListView.

这就是我所做的。一些解释：timeTable是 ListView 前面的一个小部件，并且statisticItem正是Container我上面提到的。

body: Column(
      children: <Widget>[
        timeTable(),
        SizedBox(height: 18,),
        Expanded(
          child: ListView.separated(
            itemCount: 5,
            separatorBuilder: (context, index) => SizedBox(height: 24.0,),
            itemBuilder: (context, index) => statisticItem(),
          ),
        )
      ],
    )

另外，我在shaderMask上做了一些努力，但只能改变背景颜色。任何想法我都会非常感激。

它可能是这样的：

body: Column(
    children: <Widget>[
      timeTable(),
      SizedBox(
        height: 18,
      ),
      Expanded(
        child: Stack(
          child: ListView.separated(
            itemCount: 5,
            separatorBuilder: (context, index) => SizedBox(
              height: 24.0,
            ),
            itemBuilder: (context, index) => statisticItem(),
          ),
          FadeEndListView(),
        ),
      )
    ],
  ),

其中 FadeEndListView 是：

class FadeEndListView extends StatelessWidget {
  const FadeEndListView({
    Key key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Positioned(
      bottom: 0,
      left: 0,
      right: 0,
      height: 70,
      child: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            stops: [0.0, 1.0],
            colors: [
              Theme.of(context).scaffoldBackgroundColor.withOpacity(0.0),
              Theme.of(context).scaffoldBackgroundColor,
            ],
          ),
        ),
      ),
    );
  }
}

我的回答来自：淡入淡出边缘 ListView - Flutter https://stackoverflow.com/questions/51066628/fading-edge-listview-flutterYariv.A 的回答。有小的变化。