获取多维数组从JSONArray（PHP到Android） [英] Getting MultiDimensional Array from JSONArray(PHP to ANDROID)

问题描述

大家好，我的PHP文件的json_en codeD输出是：

  [{指标：1，问题：如果泊位的火车数量超过它的五分之一900，发现在列车总泊位？，选项：[1145，1130，1135，1125，1120]，回答：1125，useranswers：1145}]
 

在我的Andr​​oid code，我必须存储在一个二维数组的选项。

  JSONArray jArray =新JSONArray（结果）;
            JSONObject的json_data = NULL;
            JSONArray options_array = NULL;
            JSONArray option_ids_array = NULL;
            no_of_questions = jArray.length（）;
            问题=新的String [no_of_questions]
            question_id =新的String [no_of_questions]
            选项​​=新的String [no_of_questions] [];
            option_ids =新的String [no_of_questions] [];
            的for（int i = 0; I＆LT; no_of_questions;我++）{
                json_data = jArray.getJSONObject（ⅰ）;
                问题[I] = json_data.getString（问题）;
                question_id [I] = json_data.getString（question_ids）;
                Log.i（问题IDS，+ question_id [I]）;
                options_array = json_data.getJSONArray（「购股权」）;
                option_ids_array = json_data.getJSONArray（option_ids）;
                选项​​[I] =新的String [options_array.length（）];
                option_ids [I] =新的String [options_array.length（）];
                对于（INT J = 0; J＆LT; options_array.length（）; J ++）{
                    选项​​[I] [J] = options_array.get（J）的ToString（）;
                    option_ids [I] [J] = option_ids_array.get（J）的ToString（）;
                }
             }
 

如何做到这一点？
请帮帮忙，我是新来的Andr​​oid系统。

解决方案

 一个String =[{\\指数\\：1，\\问题\\：\\如果在火车泊位数900超过它的五分之一，发现在总泊位train?\\\",\\\"options\\\":[\\\"1145\\\",\\\"1130\\\",\\\"1135\\\",\\\"1125\\\",\\\"1120\\\"],\\\"answers\\\":\\\"1125\\\",\\\"useranswers\\\":\\\"1145\\\"}]\";
        尝试{
            JSONArray一个;
            一个=新JSONArray（S）;
            JSONObject的O =（JSONObject的）a.get（0）;
            JSONArray选项= o.getJSONArray（「购股权」）;
        }赶上（JSONException E）{
            // TODO自动生成catch块
            e.printStackTrace（）;
        }
 

Hi My php file's json_encoded output is:

[{"index":1,"questions":"If the number of berths in a train are 900 more than one-fifth of it, find the total berths in the train?","options":["1145","1130","1135","1125","1120"],"answers":"1125","useranswers":"1145"}]

In my android code, I have to store "options" in a 2D array.

 JSONArray jArray = new JSONArray(result); 
            JSONObject json_data=null; 
            JSONArray options_array=null;
            JSONArray option_ids_array=null;
            no_of_questions=jArray.length();
            questions=new String[no_of_questions];
            question_id=new String[no_of_questions];
            options=new String[no_of_questions][];
            option_ids=new String[no_of_questions][];
            for(int i=0;i<no_of_questions;i++){
                json_data = jArray.getJSONObject(i); 
                questions[i] =json_data.getString("questions");
                question_id[i] =json_data.getString("question_ids");
                Log.i("Question ids",""+question_id[i]);
                options_array=json_data.getJSONArray("options");
                option_ids_array=json_data.getJSONArray("option_ids");
                options[i]=new String[options_array.length()];
                option_ids[i]=new String[options_array.length()];
                for(int j=0;j<options_array.length();j++){
                    options[i][j]=options_array.get(j).toString();
                    option_ids[i][j]=option_ids_array.get(j).toString();
                }
             } 

How to do that? Please help, I'm new to ANDROID.

解决方案

        String s = "[{\"index\":1,\"questions\":\"If the number of berths in a train are 900 more than one-fifth of it, find the total berths in the train?\",\"options\":[\"1145\",\"1130\",\"1135\",\"1125\",\"1120\"],\"answers\":\"1125\",\"useranswers\":\"1145\"}]";
        try {
            JSONArray a;
            a = new JSONArray(s);
            JSONObject o = (JSONObject) a.get(0);
            JSONArray options = o.getJSONArray("options");
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

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