如果 JSONArray 中的 id 相同，如何在一个 textview 上显示值

Question

我有显示酒店先前订单详细信息的 json 数据。

如果日期和时间相同，则项目的“名称”应设置在 ListView 中的相同 TextView 中，并用逗号（，）分隔。

我从 API 获得的数据是这样的：-

{
 "error": false,
 "checkstatus": [
[
  {        
    "id": "244",                  
    "name": "Chicken Breast Curry",
    "date": "2020-02-22 11:13:53"       
  },
  {        
    "id": "244",       
    "name": "Vegetarian ", 
    "date": "2020-02-22 11:13:53"       
  },      
]
[
  {        
    "id": "245",                  
    "name": "Punjabi Royal for 2 person", 
    "date": "2020-02-25 09:11:23"       
  },       
]
]
}

这是我的 Java 类：-

for (int i = 0; i < array.length(); i++) {
        try {
            JSONArray jsonArray = array.getJSONArray(i);
            for (int j = 0; j < jsonArray.length(); j++) {
                JSONObject object = jsonArray.getJSONObject(j);
                sproduct_name = object.getString(TAG_PRODUCT_NAME);                  
                sdate_time = object.getString(TAG_TIME);                   
                orderId = object.getString(TAG_ORDER_ID);

                get = new HashMap<>();
                get.put(TAG_PRODUCT_NAME, sproduct_name);                    
                get.put(TAG_TIME, sdate_time);                   
                get.put(TAG_ORDER_ID, orderId);

                myList.add(get);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
    adapter = new SimpleAdapter(getActivity(), myList, R.layout.order_history_child,
            new String[]{TAG_PRODUCT_NAME, TAG_TIME, TAG_ORDER_ID},
            new int[]{R.id.product_name, R.id.date_time, R.id.order_ids}) {

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {

            final View view = super.getView(position, convertView, parent);
            TextView product_name = view.findViewById(R.id.product_name);              
            TextView date_time = view.findViewById(R.id.date_time);               
            final TextView orderid = view.findViewById(R.id.order_ids);            

            return view;
        }
    };

现在我得到这样的数据截图：-

这就是我想要的：-

Answer 1

为日期和时间以及字符串生成器创建 ArrayList

List<String> datetimeList = new ArrayList<String>();

StringBuilder sb = new StringBuilder();

在你的 ArrayList 中添加日期和时间的字符串并与列表进行比较，如果字符串已经存在或不存在

 for (int j = 0; j < jsonArray.length(); j++) {
                    JSONObject object = jsonArray.getJSONObject(j);
                    sdate_time = object.getString(TAG_TIME);                   
                    orderId = object.getString(TAG_ORDER_ID);

datetimeList.add(sdate_time);

Scanner input = new Scanner(System.in);

String input = input.next();
boolean isExist = false;
for (String item : datetimeList) { 
    if (input.equals(datetimeList.get(counter))) {
        //Your logic if it's there.
         isExist = true;
         break;
   }
}

 if(isExist) {
     //Found in the arraylist.
     sproduct_name = object.getString(TAG_PRODUCT_NAME);                  

    sb.append(sproduct_name);



 get = new HashMap<>();
                get.put(TAG_PRODUCT_NAME, sb.toString());                    
                get.put(TAG_TIME, sdate_time);                   
                get.put(TAG_ORDER_ID, orderId);

            myList.add(get);

 }
else{
         sproduct_name = object.getString(TAG_PRODUCT_NAME); 
  get = new HashMap<>();
                get.put(TAG_PRODUCT_NAME, sproduct_name);                    
                get.put(TAG_TIME, sdate_time);                   
                get.put(TAG_ORDER_ID, orderId);





  myList.add(get);                 

}
    }

Answer 2

try {
            JSONArray jsonArray = array.getJSONArray(i);
            for (int j = 0; j < jsonArray.length(); j++) {
                JSONObject object = jsonArray.getJSONObject(j);
                sproduct_name = object.getString(TAG_PRODUCT_NAME);                  
                sdate_time = object.getString(TAG_TIME);                   
                orderId = object.getString(TAG_ORDER_ID);

                get = new HashMap<>();
                get.put(TAG_PRODUCT_NAME, sproduct_name);  

                 //check here
                if(!object.getString(TAG_TIME).equals(sdate_time)){
                       get.put(TAG_TIME, sdate_time);                   
                }

                get.put(TAG_ORDER_ID, orderId);
                myList.add(get)

            }