今天调试flutter程序时报错。程序运行时报如下错误: type ‘Future<int>’ is not a subtype of type ‘int’ in type cast 错误源码 AI检测代码解析 int order = DatabaseHelper.dbhelper.getTaskGroupRelationOrder() as int; TaskGroupRelation relation = TaskGroupRelation( id:0, taskId:snapshot.data?[i...
Flutter 报错 Flutter : 'Future <dynamic>' is not a subtype of type bool 2020-08-07 15:31 −... Arcturis 0 4193 TypeError: Object of type 'int32' is not JSON serializable 2019-12-06 14:41 −将模型用flask封装,返回json时报错:TypeError: Object of type 'int32' is not JSON serializ...
按钮的onpressed事件: onpressed:_saveData() 改成 onpressed:_saveData 直接传递函数名给onpressed完事了。
Type '_InternalLinkedHashMap' is not, Type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'bool' Ask Question Asked 5 months ago. Modified 5 months ago. Viewed 232 times 0 I am new to flutter and don't know how to solve this. When decoding a bool from json ty...
“type 'null' is not a subtype of type 'Future<void>'” 这个错误通常出现在 Dart 或 Flutter 编程中,意味着你的代码试图将一个 null 值赋给一个期望返回 Future<void> 类型的方法或变量。在 Dart 中,Future<void> 表示一个异步操作,该操作没有返回值(即返回 void),但必须是一个 Futu...
我是Flutter的新手,正在flutter中集成POS机,并使用pos_printer_manager包。 它显示了此包的catch部分中的错误,即type 'Future<bool?>' is not a subtype of type 'FutureOr<bool>' in type cast &在代码中指出 /// [writeBytes] let you write raw list int data into socket ...
import 'dart:convert'; import 'package:flutter/material.dart'; import 'package:started_flutter/data_model.dart'; import 'package:http/http.dart' as http; class FutureStudy extends StatefulWidget { const FutureStudy({super.key}); @override State<FutureStudy> createState() => _FutureStudyState(...
问Flutter:类型'Future<bool>‘不是类型转换中类型'bool’的子类型EN昨天最后留的几句关于bool类型的...
问如何修复类型“Future<dynamic>”不是类型“String”Flutter的子类型EN以个人信息为例操作string类型 ...
Hi! I have the kind of error, when I try to get location: type 'Future<dynamic>' is not a subtype of type 'Future<Map<String, double>>' where Future is from dart:async Future is from dart:async Map is from dart:core String is from dart:c...