用Map而不是List的Flutter ListView [英] Flutter listview with Map instead of List

问题描述

我试图在 ListView.builder 小部件中显示 HashMap 值的内容。有没有办法做到这一点？使用 List ，我可以简单地使用索引，但是如何使用 HashMap 而不使用列出吗？
地图的键是字符串，值是要显示数据的地图。

I'm trying to display the contents of my HashMap values in a ListView.builder widget. Is there a way to do this? With a List I could simply use the index, but how would that work with a HashMap without making a List out of it? The keys of the map are strings and the values are maps with the data to display.

推荐答案

有点晚了，但您也可以尝试一下。
地图值= snapshot.data;

Its a little late but You could also try this. Map values = snapshot.data;

return new ListView.builder(
  itemCount: values.length,
  itemBuilder: (BuildContext context, int index) {
    String key = values.keys.elementAt(index);
    return new Column(
      children: <Widget>[
        new ListTile(
          title: new Text("$key"),
          subtitle: new Text("${values[key]}"),
        ),
        new Divider(
          height: 2.0,
        ),
      ],
    );
  },
);

有关详细示例，请查看此
https://kodestat.gitbook.io/flutter/39-flutter-listviewbuilder-using-dart-maps

for a more detailed example check this out https://kodestat.gitbook.io/flutter/39-flutter-listviewbuilder-using-dart-maps

这篇关于用Map而不是List的Flutter ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！