Question

我想从此代码中获取男性对象，以便我的输出显示所有性别有男性。

  {
   "contacts": [
      {
            "id": "c200",
            "name": "Ravi Tamada",
            "email": "ravi@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c201",
            "name": "Johnny Depp",
            "email": "johnny_depp@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
           }
    },

这是我试图获取的json代码

`if（jsonStr！= null）{ 尝试{ JSONObject jsonObj = new JSONObject（jsonStr）;

                contacts = jsonObj.getJSONArray(TAG_CONTACTS);


                for (int i = 0; i < contacts.length(); i++) {
                    JSONObject c = contacts.getJSONObject(i);


                    if(TAG_GENDER == male ){


                    String name = c.getString(TAG_GENDER);


                    HashMap<String, String> contact = new HashMap<String, String>();

                    contact.put(TAG_GENDER, name);

                    contactList.add(contact);
                }}  }
            catch (JSONException e) {
                e.printStackTrace();
            }
            }
         else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }`

Answer 1

这里“{”显示json对象和“[”显示json数组，所以我们将创建json对象，然后像jsonArray那样...

JSONObject jsonObj = new JSONObject(JsonObjectKey);

            // if( jsonObj!=null)
            // {
            JSONArray list = jsonObj.getJSONArray("contacts");// here your json array aname
            // if(list!=null)
            for (int i = 0; i < list.length(); i++) {
//here you will fetch your all values that in your array..
}

Answer 2

我正在修改你的for循环..

          for (int i = 0; i < contacts.length(); i++)
           {
           JSONObject c = contacts.getJSONObject(i);

            if((JSONObject)contacts.get(i)).get("gender").toString().equals("male") ){


            String name = (JSONObject)contacts.get(i)).get("name").toString();


            HashMap<String, String> contact = new HashMap<String, String>();

            contact.put(TAG_GENDER, name);

            contactList.add(contact);
        }}

Answer 3

您需要进行一些修正。

在for循环之外声明您的哈希映射
而不是使用＆＃39; ==＆＃39;在if循环中使用.equals

我如何获取以下数据？

3 个答案: