http post 请求不适用于我的 flutter 应用程序代码

Question

我正在尝试向 post 人员 URL 发出 HTTP post 请求。在代码中，我找不到任何错误，但它在 flutter 应用程序中不起作用。

虽然在文本框中输入了数据，但响应并没有在颤动中显示。我附上了图片

enter image description here

post附上人工代码的请求正文。

这是postman中的响应体： {enter image description here “处理时间”：1， “结果”： { “id”：“fa6a14d5-2888-4634-8158-efcaa0690211”， "noteType": "PRIVATE_NOTE", “隐私”：“私人”， “反应”：“中性”， “描述”：“贵霜一号”， “状态”：“活跃”， "author": "测试用户", "authorId": "00000000-0000-0000-0000-000000000000", “修改”：“2021-09-07T13：59：33.9926797Z”， “标记”：假 } }

这是我的代码：

import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

postData() async {
  try {
    var response = await http.post(
        Uri.parse("https://zen-api-1010.azure-api.net/notes/v1/create"),
        headers: {
          "Ocp-Apim-Subscription-Key": "008c47b597e54aedadbd5e4d270b35ed",
          "Ocp-Apim-Trace": "true"
        },
        body: {
          "noteType": 0.toString(),
          "description": "KUSHAN  1".toString(),
          "authorReaction": 0.toString(),
          "privacy": 0.toString(),
        });
    print(response.body);
  } catch (e) {
    print(e);
  }
}

class NavPrivatePage extends StatefulWidget {
  @override
  _NavPrivatePageState createState() => _NavPrivatePageState();
}

class _NavPrivatePageState extends State<NavPrivatePage> {
  TextEditingController noteTypeController = TextEditingController();
  TextEditingController descriptionController = TextEditingController();
  TextEditingController authorReactionController = TextEditingController();
  TextEditingController privacyController = TextEditingController();

  bool inVisible = true;
  bool isNotVisible = false;

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: Text(
            'Private Note Auto Expand',
            style: TextStyle(
              fontSize: 14,
            ),
          ),
          centerTitle: true,
          backgroundColor: const Color.fromRGBO(255, 191, 0, 1),
        ),
        body: SingleChildScrollView(
          child: Center(
            child: Padding(
              padding: const EdgeInsets.all(10.0),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.start,
                children: [
                  Visibility(
                    visible: inVisible,
                    child: TextButton(
                      onPressed: () {
                        setState(() {
                          isNotVisible = !isNotVisible;
                        });
                      },
                      child: Text(
                        'Create Private Note',
                        style: TextStyle(
                          color: Colors.white,
                        ),
                      ),
                      style: TextButton.styleFrom(
                        backgroundColor: Colors.grey[900],
                      ),
                    ),
                  ),
                  Visibility(
                    visible: isNotVisible,
                    child: Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: TextFormField(
                        controller: descriptionController,
                        autofocus: false,
                        onChanged: (text) {
                          print("Text $text");
                        },
                        minLines: 2,
                        maxLines: 20,
                        keyboardType: TextInputType.multiline,
                        decoration: InputDecoration(
                          hintText: 'Enter your message here',
                          hintStyle: TextStyle(
                            color: Colors.grey[600],
                            fontSize: 12,
                          ),
                          border: OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(5)),
                          ),
                        ),
                      ),
                    ),
                  ),
                  Visibility(
                    visible: isNotVisible,
                    child: TextButton(
                      onPressed: () {
                        postData();
                      },
                      child: Text(
                        'Submit',
                        style: TextStyle(
                          color: Colors.white,
                        ),
                      ),
                      style: TextButton.styleFrom(
                        backgroundColor: Colors.grey[600],
                      ),
                    ),
                  ),
                  Visibility(
                    visible: isNotVisible,
                    child: Center(
                      child: Card(
                        shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(10)),
                        color: Colors.grey[300],
                        child: Container(
                          padding: EdgeInsets.all(10),
                          height: 130,
                          child: Column(
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              ListTile(
                                trailing: Icon(Icons.more_horiz),
                                leading: CircleAvatar(
                                  backgroundImage: NetworkImage(
                                      'https://images.pexels.com/photos/220453/pexels-photo-220453.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500'),
                                ),
                                subtitle: Text(
                                  '2 days ago',
                                  style: TextStyle(
                                    color: Colors.grey[800],
                                  ),
                                ),
                              ),
                              Text(
                                  'This is a private note that auto expands based on the text entered. The background will determine the privacy level of the post',
                                  style: TextStyle(
                                    fontSize: 10,
                                    color: Colors.black87,
                                  ),
                                  textAlign: TextAlign.justify),
                            ],
                          ),
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      );
}

Answer 1

我建议将您的 TextButton 的 onPressed 设为 async 方法并在其中尝试 await postData()。

Answer 2

将您的 postData() 更改为

postData() async {
    try {
      var response = await http.post(
          Uri.parse("https://zen-api-1010.azure-api.net/notes/v1/create"),
          headers: {
            "Content-type": "application/json",
            "Accept": "application/json",
            "Ocp-Apim-Subscription-Key": "008c47b597e54aedadbd5e4d270b35ed",
            "Ocp-Apim-Trace": "true"
          },
          body: jsonEncode({
            "noteType": 0.toString(),
            "description": "KUSHAN  1".toString(),
            "authorReaction": 0.toString(),
            "privacy": 0.toString(),
          }));
      print(response.statusCode);
    } catch (e) {
      print(e);
    }
  }

问题是 api 接受 json 数据，但您发送的地图需要首先编码到 json，其次 header 有两个缺少参数。

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