flutter futureBuilder不适用于布尔返回类型

Stream<bool> getBoolData() {
  // 返回一个模拟的布尔类型的流
  return Stream<bool>.fromFuture(Future.delayed(Duration(seconds: 2), () => true));
}

Widget build(BuildContext context) {
  return StreamBuilder<bool>(
    stream: getBoolData(),
    builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
      if (snapshot.connectionState == ConnectionState.waiting) {
        return CircularProgressIndicator();
      } else if (snapshot.hasError) {
        return Text('Error: ${snapshot.error}');
      } else {
        bool data = snapshot.data;
        return Text('Data: $data');
      }
    },
  );
}