flutter - http.dart onError : Invalid argument (onError): Error handler must accept one Object or one Object and a StackTrace as arguments 的无效参数

Question

我是 Flutter 的新手，我想了解我的错误处理程序有什么问题:

import 'package:http/http.dart' as http;
try {
  var response = await client.get('$endpoint/users/$userId');

  // Convert and return
  return User.fromJson(json.decode(response.body));
} on HttpException catch (ex) {
  print('http');
  print(ex);
  print('exception');
  return null;
} on Error catch (error) {
  // code will go here
  print(error);
  return null;
}

结果是:

I/flutter ( 3103): Invalid argument (onError): Error handler must accept one Object or one Object and a StackTrace as arguments.: Closure: (HttpException) => Null

和我什么都没做完全一样try/catch ，谁能建议我应该如何做错误处理程序？据我了解(error)这里应该是“一个对象”，如果我错了，请纠正我。蒂亚!

Answer 1

这是一个 http依赖错误，它在 0.12.2 版本中得到修复，应该在您更新依赖时解决。