Passing JSON array - Android

Question

I'm writing an simple web service, using php and mysql as server and android app as client to retrieve data.

My server side returns this JSON array when I make a query.

"customers":[
    {"firstName":"Jason", "lastName":"Smith"},
    {"firstName":"Joan", "lastName":"Smith"},
    {"firstName":"Jennifer", "lastName":"Jones"}
]

My question is how to parse this JSON array into ArrayList for using later.

Thank you in advanced.

Possible duplicate of [Sending and Parsing JSON Objects](http://stackoverflow.com/questions/2818697/sending-and-parsing-json-objects) — Tim Malseed, Dec 13 '15 at 09:37

Mohammed Aouf Zouag · Answer 1 · 2015-12-13T11:12:35.563

1

You can proceed this way:

String jsonStr; // your JSON string
JSONArray jsonArray = new JSONArray(jsonStr);

for(int i = 0; i < jsonArray.length(); i++) {
    JSONObject jsonObj = jsonArray.getJSONObject(i);
    String firstname = jsonObj.getString("firstname");
    String lastname = jsonObj.getString("lastname");
}

edited Dec 13 '15 at 11:12

answered Dec 13 '15 at 09:41

Mohammed Aouf Zouag

17,042
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Aman Gupta - ΔMΔN · Answer 2 · 2015-12-13T10:58:34.980

Your array list of type myData

 List<myData> listData = new ArrayList<myData>(); 
 JSONArray jsonArray = new JSONArray("your response json string");

                for(int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObj = jsonArray.getJSONObject(i);
                    listData.add(new myData(jsonObj.getString("firstname"),jsonObj.getString("lastname")));
                }
// your ArrayList is ready, and you can use it anytime.

Your data structure for firstname and lastname

myData.java

public class myData {
String firstName, lastName;
myData(String fName, String lName) {
    this.firstName = fName;
    this.lastName = lName;
}
}

score 0 · Answer 3 · answered Dec 13 '15 at 09:49

0

Use GSON

        public class Customer{
            String firstName;
            String lastName;

            public static class List extends ArrayList<Customer>{

            }
        }
        public static Customer.List getCustomersList(String jsonString){
            Gson gson = new GsonBuilder().create();
            return gson.fromJson(jsonString, Customer.List.class);
        }

answered Dec 13 '15 at 09:49

Nick

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What if I want to parse json from a link? – Akshay Chordiya Dec 13 '15 at 09:52
You need to write an Async Task to get the string like mentioned here http://stackoverflow.com/a/15835425/1402525 – Nick Dec 13 '15 at 15:10

score -1 · Answer 4 · answered Dec 13 '15 at 09:40

-1

Use libraries like GSON or Jackson.

answered Dec 13 '15 at 09:40

Vamsi

878
1
8
25

Don't post link as answer dear.!! – Kishore Jethava Dec 13 '15 at 09:50

score -1 · Answer 5 · answered Dec 13 '15 at 09:46

You can do like this without GSON or Jackson

ArrayList<HashMap<String, String>>  listCustomer= new ArrayList<HashMap<String,String>>();
    JSONArray jsonArray = new JSONArray(jsonStr);

    for(int i = 0; i < jsonArray.length(); i++) {
        HashMap<String, String> mapCustomer = new HashMap<String, String>();
        JSONObject jsonObj = jsonArray.getJSONObject(i);

        mapCustomer.put("firstname", jsonObj.getString(firstname));
        mapCustomer.put("lastname", jsonObj.getString(lastname));

        listCustomer.add(mapCustomer);

    }

Passing JSON array - Android

5 Answers5