Creating new JSONObject from String Returns Null - JAVA / Android

Question

I'm attempting to create a new JSONObject from a String however for some reason the new JSONObject is always null - and I'm unsure why.

Any suggestions are appreciated.

Source:

JSONObject messagesObj;


    String mArr = intent.getStringExtra("msgArr");

            try {
                if (mArr != null)
                    messagesObj = new JSONObject(mArr);

                if (messagesObj != null)
                    populateMessages(messagesObj);
                DataManager.clientChatMarkMessagesSeen(chatId);
            } catch (JSONException e) {
            //    DataManager.clientChatLoad(this);
                e.printStackTrace();
            }

Values:

String mArr = [{"message":"User has joined the chat.","type":"agent","created":"2016-12-07 17:35:09","name":"User"},{"message":"Hello World?","type":"agent","created":"2016-12-07 17:35:17","name":"User"},{"message":"User has left the chat.","type":"agent","created":"2016-12-07 17:38:40","name":"User"}]

It's not a JSONObject though, it's a JSONArray.

Tom Nijs
– Tom Nijs

2016-12-08 16:27:21 +00:00
Commented Dec 8, 2016 at 16:27 — Tom Nijs
– Tom Nijs, Commented Dec 8, 2016 at 16:27

Gabe Sechan · Accepted Answer · 2016-12-08 16:27:12Z

4

Because that isn't a json object- its a JSONArray. Try creating a JSONArray instead of a JSONObject

answered Dec 8, 2016 at 16:27

Gabe Sechan

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Comments

Jayakrishnan · Accepted Answer · 2016-12-08 16:39:27Z

0

The string is json array not object..please see the root node it is not {}

Modify the string like this array of objects

String mArr = {"results": [{"message":"User has joined the chat.","type":"agent","created":"2016-12-07 17:35:09","name":"User"},{"message":"Hello World?","type":"agent","created":"2016-12-07 17:35:17","name":"User"},{"message":"User has left the chat.","type":"agent","created":"2016-12-07 17:38:40","name":"User"}]}

edited Dec 8, 2016 at 16:39

answered Dec 8, 2016 at 16:32

Jayakrishnan

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Comments

Ayush Baheti · Accepted Answer · 2016-12-08 16:40:01Z

-1

Use JSONArray array = new JSONArray("string here"). It's an array if it starts with square brackets.

answered Dec 8, 2016 at 16:40

Ayush Baheti

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