如何在 Flutter 中访问文档快照中的数据

Question

我在 Firestore 中有项目我正在使用此方法检索

class EntriesList extends StatefulWidget {
  const EntriesList({Key key}) : super(key: key);

  @override
  _EntriesListState createState() => _EntriesListState();
}

class _EntriesListState extends State<EntriesList> {
  final Stream _entryStream = FirebaseFirestore.instance
      .collection('users')
      .doc(FirebaseAuth.instance.currentUser.uid)
      .snapshots();


  @override
  Widget build(BuildContext context) {
    return StreamBuilder(
      stream: _entryStream,
      builder: (BuildContext context, AsyncSnapshot snapshot) {
        if (snapshot.hasError) {
          return Text("Something went wrong");
        }

        if (snapshot.connectionState == ConnectionState.waiting) {
          return CircularProgressIndicator();
        }

        // this is where I am getting my error
        return ListView(children: snapshot.data.map((DocumentSnapshot document) {
                   Map<String, dynamic> data = document.data() as Map<String, dynamic>;
                   return Text(data['text'])
               }
            )
         );
      },
    );
  }
}

我本质上是想从我的快照中获取数据，但它返回的是 _JsonDocumentSnapshot 的实例。我不确定如何从这里获取我的数据。

按照本指南了解如何从 Firestore 获取物品 https://firebase.flutter.dev/docs/firestore/usage/