未呈现数据，它给出错误未处理的异常:类型'List<dynamic>‘不是Flutter中类型'Map<dynamic，dynamic>’的子类型

Future<void> fetchData() async {
  try {
    var response = await http.get(Uri.parse('https://example.com/data'));
    var data = jsonDecode(response.body);
    print(data); // 打印数据以检查格式
    if (data is Map) {
      // 处理Map类型的数据
    } else if (data is List) {
      // 处理List类型的数据
    }
  } catch (e) {
    print(e);
  }
}

Future<void> processData(List<dynamic> dataList) async {
  for (var item in dataList) {
    if (item is Map) {
      // 处理Map类型的数据
    }
  }
}

Future<void> convertListToMap(List<dynamic> dataList) async {
  Map<dynamic, dynamic> resultMap = {};
  for (var item in dataList) {
    if (item is List && item.length == 2) {
      resultMap[item[0]] = item[1];
    }
  }
  print(resultMap); // 打印转换后的Map
}

[
  {"key": "name", "value": "John"},
  {"key": "age", "value": 30}
]

Future<void> fetchData() async {
  try {
    var response = await http.get(Uri.parse('https://example.com/data'));
    var dataList = jsonDecode(response.body);
    Map<dynamic, dynamic> resultMap = {};
    for (var item in dataList) {
      if (item is Map && item.containsKey('key') && item.containsKey('value')) {
        resultMap[item['key']] = item['value'];
      }
    }
    print(resultMap); // 打印转换后的Map
  } catch (e) {
    print(e);
  }
}