[ERROR:flutter/lib/ui/ui_dart_state.cc(148)] UnhandledException: type '_InternalLinkedHashMap<Stringdynamic>' is not a subtype of type 'FutureOr<List<dynamic>>' 下面是我的代码: Future<List> getmatches() async{
错误:UnhandledException: type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'IterablestreamController.stream.listen((t) => { }); }
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当我试图使用json.decode(sharedPreferences.getString('key'))检索这个映射时,我得到了错误UnhandledException: type '_InternalLinkedHashMap结果类别: final String position; final Driver driver
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使用Flutter http包调用http.get时,会抛出以下异常: UnhandledException: Unhandled error type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'Map<String, String>' occurred in bloc Instance of 'Acc
类类别错误:未处理的异常:键入'_InternalLinkedHashMap<String,dynamic>‘不是'Iterable’类型的子类型 int idException: type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'Iterable<dynamic>&
b.ranking.compareTo(a.ranking));
// [hand2, hand1, hand3]Dart抱怨:NoSuchMethodError: Class '_InternalLinkedHashMap<String, int>' has no instance getter &