从 Json URL 读取 Lan ,Long 并将 lat 和 long 分配给 map 的标记？

Posted 2023-04-19

【中文标题】从 Json URL 读取 Lan ,Long 并将 lat 和 long 分配给 map 的标记？

【英文标题】：Read Lan ,Long from Json URL and assign the lat and long to map 's markers?

【发布时间】：2017-12-03 03:15:54

【问题描述】：

我是 android 新手，我正在尝试从 URL 读取 json 文件，并获取 lat 和 long 以及 将值关联到标记并在地图中显示，我的问题是如何在阅读 json 的内容后获得 lan，long ？ 这是 json url 数据 URL上的json数据

"properties":"1":"name":"Villa For 
Sale","lat":"35.2474962142","lng":"-91.3480163353","price":"$100,000","image1":"http:\/\/wpl28.realtyna.com\/theme28\/wp-content\/uploads\/WPL\/91\/thimg_12_800x420.jpg","image2":"http:\/\/wpl28.realtyna.com\/theme28\/wp-content\/uploads\/WPL\/85\/thimg_2_800x420.jpg","2":"name":"Apartment For Rent","lat":"35.9542249162","lng":"-101.21893164","price":"$40,000","image1":"ht

在 android 中，我想获取 lat、long 并将每个值分配给市场 地图

      //this method should get json data from onPostExecute(String s)
      public void the_received_data(String received_data)

       

      class Read_JSON extends AsyncTask<String ,String ,String >
       MainActivity mainActivity;
       // class to handle reading json file
        @Override
        protected String doInBackground(String... params) 
        HttpURLConnection connection =null;
        BufferedReader data =null;
        InputStream json_data;
        try 
           URL url = new URL(params[0]);
            connection =(HttpURLConnection)url.openConnection();
            connection.connect();
            //holding the data into stream
            json_data =connection.getInputStream();
            data = new BufferedReader(new InputStreamReader(json_data));
            StringBuffer stringBuffer = new StringBuffer();
            //read the data from the bufferedredaer line by line
            String line ="";
            while((line =data.readLine()) != null)
                stringBuffer.append(line);
            
            return stringBuffer.toString();
         catch (MalformedURLException e) 
            e.printStackTrace();
         catch (IOException e) 
            e.printStackTrace();
        
        finally
            if(connection !=null)connection.disconnect();
            try 
                if(data != null)
                    data.close();
             catch (IOException e) 
                e.printStackTrace();
            
        
      return null; 

       @Override
       protected void onPostExecute(String s) 
         super.onPostExecute(s);
         mainActivity.the_received_data(s);
     
 

【参考方案1】：

获得字符串响应后，只需将其解析为 JSONObject，如下例所示，然后您就可以获得纬度和经度。

JSONObject jsonObj = new JSONObject(""name":"myName","address":"myAddress"");
String my_name = jsonObj.getString("myName");