从 URL 获取 JSON 数组并将其转换为 Android 中的 HashMap

Posted 2023-02-25

【中文标题】从 URL 获取 JSON 数组并将其转换为 Android 中的 HashMap

【英文标题】：Getting a JSON array from an URL and converting it into a HashMap in Android

【发布时间】：2015-09-08 20:17:12

【问题描述】：

我有一个 URL，例如 www.example.com/movies/，它有以下 JSON 数组：

[
    
        "id": "alice",
        "director": "Tim Burton",
        "year": "2010",
        "image":"alice",
        "length": "108 min",
        "stars": "Mia Wasikowska, Johnny Depp, Helena Bonham Carter",
        "name": "Alice in Wonderland",
        "description": "Nineteen-year-old Alice returns to the magical world from her childhood adventure, where she reunites with her old friends and learns of her true destiny: to end the Red Queen's reign of terror.",
        "rating": "6.5",
        "url": "http:\/\/ia.media-imdb.com\/images\/M\/MV5BMTMwNjAxMTc0Nl5BMl5BanBnXkFtZTcwODc3ODk5Mg@@._V1_SY317_CR0,0,214,317_AL_"
    ,
    
        "id": "avator",
        "director": "Cameron",
        "year": "2009",
        "image":"avatar",
        "length": "162 min",
        "stars": "Sam Worthington, Zoe Saldana, Sigourney Weaver",
        "name": "Avatar",
        "description": "A paraplegic Marine dispatched to the moon Pandora on a unique mission becomes torn between following his orders and protecting the world he feels is his home.",
        "rating": "7.9",
        "url": "http:\/\/ia.media-imdb.com\/images\/M\/MV5BMTYwOTEwNjAzMl5BMl5BanBnXkFtZTcwODc5MTUwMw@@._V1_SY317_CR0,0,214,317_AL_"
    ]

我想从 android 获取这个 JSON 数组并将其转换为 Hashmap。请帮帮我。

【问题讨论】：

看看How to ask question in SO?

***.com/questions/21720759/…的可能重复

1) ***.com/questions/9605913/… 2) ***.com/questions/22011200/…

请看我的回答。

【参考方案1】：

您可以从 URL 获取 JSON 响应

    HttpClient client;
    String _responseMain = "";
    HttpResponse responseMain;


        AsyncTask<String, String, String> _Task = new AsyncTask<String, String, String>() 

            @Override
            protected void onPreExecute() 


            

            @Override
            protected String doInBackground(String... arg0) 
            

                if (NetworkAvailablity.checkNetworkStatus(CurrentActivity.this)) 
                




                    try 
                        // Creating HTTP client
                        client = new DefaultHttpClient();

                        // Creating HTTP Post
                        HttpGet httpGet= new HttpGet("http://api.myjson.com/bins/44tys%22");




                        responseMain = client.execute(httpGet);
                        HttpEntity entitity = responseMain.getEntity();

                        _responseMain = EntityUtils.toString(entitity); // content will be consume only once
                System.out.println("Response : "+_responseMain);


                     catch (UnsupportedEncodingException e) 
                        // writing error to Log
                        e.printStackTrace();

                    
                    catch (Exception e) 
                        // TODO: handle exception
                        e.printStackTrace();


                    


                 
                else
                

                

                return null;

            
            @Override
            protected void onPostExecute(String result) 
            
                if (_responseMain!=null&&!_responseMain.equalsIgnoreCase("")) 
 try 
                            JSONArray _jArr = new JSONArray("YOUR_JSON_STRING");
                            HashMap<String, String> pairs = new HashMap<String, String>();
                            if (_jArr.length()>0) 

                                for (int i = 0; i < _jArr.length(); i++) 
                                    JSONObject _jObject = _jArr.getJSONObject(i);
                                    String _id = _jObject.getString("id");
                                    pairs.put("id", _id);

                                    String _director = _jObject.getString("director");
                                    pairs.put("director", _director);

                                    String _year = _jObject.getString("year");
                                    pairs.put("year", _year);

                                    String _image = _jObject.getString("image");
                                    pairs.put("image", _image);

                                    String _length = _jObject.getString("length");
                                    pairs.put("length", _length);

                                    String _stars = _jObject.getString("stars");
                                    pairs.put("stars", _stars);

                                    String _name = _jObject.getString("name");
                                    pairs.put("name", _name);

                                    String _description = _jObject.getString("description");
                                    pairs.put("description", _description);

                                    String _rating= _jObject.getString("rating");
                                    pairs.put("rating", _rating);

                                    String _url = _jObject.getString("url");
                                    pairs.put("url", _url);

                                
                            

                            



                         catch (JSONException e) 
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                                           

                 else 

                

            
        ;
        _Task.execute((String[]) null);

【讨论】：

前导下划线只会让可读性变差，恕我直言

非常感谢您的回复，Shoeb。但是我还没有在我的项目中保存 json 文件。我必须从 URL 中获取它。而且我必须在列表中填充值。

您可以在列表中填充值，因此您可以使用我制作的字符串值。

我有将 json 数组转换为 hashmap 的代码。我需要一个代码来从这个 url "api.myjson.com/bins/44tys" 读取 json 代码。这个 URL 有我的 json 代码。