Flutter 未处理的异常：类型'；列表<；动态>'；不是类型为'；地图<；字符串，动态>'；关于粘性颤振

我想将列表视图从TextFormField显示到其他页面 但是日志中的结果是这样说的

E/flutter ( 9872): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: type 'List<dynamic>' is not a subtype of type 'Map<String, dynamic>'
E/flutter ( 9872): #0      LoanResult.simulator (package:fluttermysql/models/LoanSimulationModel.dart:62:35)
E/flutter ( 9872): <asynchronous suspension>
E/flutter ( 9872): #1      _LoanSimulationState.result (package:fluttermysql/view/LoanSimulation.dart:29:5)
E/flutter ( 9872): <asynchronous suspension>
E/flutter ( 9872): 

下面是React Native的示例

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如何使用列表获得此结果？谢谢

jsonDecode（response.body）

正在返回一个

列表

。可能它是一个包含单个元素的词典列表（您可以通过打印其内容来确保这一点），但如果是这样，您可以使用

jsonDecode（response.body）.single

。不。此数据来自数组，因此其返回未经处理的异常：错误状态：元素太多E/flatter（19540）：#0 List.single（dart:core patch/growtable_array.dart:343:5）是否尝试打印

响应。body

正在返回并分析要从中获取的元素<代码>jsonDecode（response.body）[0]会起作用，但我不确定这是否是您所期望的。结果应该是这样的：“否”：0，“利息”：“0.00”，“余额”：“10000000.00”，“本金”：“0.00”，“分期付款”：“0.00”，“状态”：trueWhat

response.body

返回？

static Future<LoanResult> simulator({String periodtime, String interestpermonth, String loanamountrequest, String idUser, String url}) async  {
    var url = "http://192.168.0.23/Api/loansimulation.php?periodtime=" + periodtime + "&interestpermonth=" + interestpermonth + "&loanamountrequest=" +loanamountrequest;
    final response = await http.get(url,headers:{"Content-Type":
    "application/json"});
    var res = LoanResult.fromJson(jsonDecode(response.body));
    return res;
  }

void result() async {
    LoanResult loanResult;
    await LoanResult.simulator(
        periodtime: periodtime,
        interestpermonth: interestpermonth,
        loanamountrequest: loanamountrequest,
        url: BaseURL.kLoanSimulationUrl)
        .then((value) => loanResult = value);
    print(loanResult.Status);
    if (loanResult.Status == true) {
      Text(loanResult.message);
      Navigator.pushReplacementNamed(context, Simulator.id);
    } else {
      _scaffoldKey.currentState.showSnackBar(SnackBar(
        content: Text(loanResult.message),
        duration: Duration(seconds: 3),
      ));
    }
  }