Combine json and make arraylist<object>

Question

I have JSON that I want to combine data from 1st object into 2nd object

{
    "ViewId": {
        "56": {
            "ViewId": "56",
            "Name": "hi",
            "param": "value"
        },
        "88": {
            "ViewId": "88",
            "Name": "hi2",
            "param": "value2"
        }
    },
    "que": [
        {
            "RId": "123",
            "ViewId": "88",
            "Count": 0
        },
        {
            "RId": "456",
            "ViewId": "56",
            "Count": 0
        }
    ]
}

Basically from this I am making ArrayList, How can I add ViewId data in to que. I want to merge JSON in following way:

{
    "que": [
        {
            "RId": "123",
            "ViewId": "88",
            "Name": "hi2",
            "param": "value2",
            "Count": 0
        },
        {
            "RId": "456",
            "ViewId": "56",
            "Name": "hi",
            "param": "value",
            "Count": 0
        }
    ]
}

It is not clear what do you want. Please try to make your question more correctly. Use commas and Capital letters please. — nutella_eater
– nutella_eater, Commented Apr 25, 2016 at 7:20
You can run a loop for that and check for respective JSONObject in the viewId array and modify that. — Nigam Patro
– Nigam Patro, Commented Apr 25, 2016 at 7:20
Do you want to merge elements of viewId into que? like 1st element of viewId should be merged into que's first element, right? — PEHLAJ
– PEHLAJ, Commented Apr 25, 2016 at 7:22
yes i want merge but as per der ViewId like ViewId of 88 should add into que whose view id is 88 — andro
– andro, Commented Apr 25, 2016 at 7:33
Can you add information about what JSON library you are using? (if any?) — J. Dow
– J. Dow, Commented Apr 25, 2016 at 7:47

PEHLAJ · Accepted Answer · 2016-04-25 09:38:41Z

1

    JSONObject ViewIdJsnObject = new JSONObject(); //replace new JSONObject() with ViewId Json Object here
    JSONArray queArray = new JSONArray();//replace new JSONArray() with actual json array;

    //Traverse through all que objects in array
    if(queArray != null && queArray.length() > 0){
        for(int i=0; i<queArray.length(); i++){
            try {
                JSONObject queObj = queArray.getJSONObject(i);
                String queViewId = queObj.getString("ViewId"); //ViewId of que object at position i
                JSONObject viewIdObj = ViewIdJsnObject.getJSONObject(queViewId); //get json object against ViewId
                if(viewIdObj != null) {
                    //Now add these value to que object at position i
                    String name = viewIdObj.getString("Name");
                    String param = viewIdObj.getString("param");
                    queObj.put("Name", name);
                    queObj.put("param", param);
                }
            } catch (JSONException jse) {
                jse.printStackTrace();
            }
        }
    }
    //Now que array contains final merged data, convert it to ArrayList<Your_model>.

answered Apr 25, 2016 at 9:38

PEHLAJ

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3 Comments

andro Over a year ago

queObj is not adding it will always overlap the data

PEHLAJ Over a year ago

You should add it to your array list directly then. Add que object first then add corresponding name & param values

andro Over a year ago

JSONArray finalValue = new JSONArray(); and then adding to finalValue.put(queObj) in for loop. finalValue will have all data

mubeen · Accepted Answer · 2016-04-26 05:56:34Z

1

Make A class

public class Data {
    int id;
    List<Que> que = new ArrayList<Que>();


    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public List<Que> getQue() {
        return que;
    }
    public void setQue(List<Que> que) {
        this.que = que;
    }

}

Make Another class called Que

public class Que {
    int RId;
    int ViewId;
    int Count;


    public int getrId() {
        return RId;
    }
    public void setrId(int rId) {
        this.RId = rId;
    }
    public int getViewId() {
        return ViewId;
    }
    public void setViewId(int viewId) {
        this.ViewId = viewId;
    }
    public int getCount() {
        return Count;
    }
    public void setCount(int count) {
        this.Count = count;
    }

}

Use it using gson

Gson gson = new Gson();
        Data data = gson.fromJson(json, Data.class);
        List<Que> queList = data.getQue();
        for(Que que : queList){
            System.out.println("This is R ID" +que.RId);
            System.out.println("This is View ID" +que.ViewId);
            System.out.println("This is Count" +que.Count);

Make sure your json attributes name matches the java instance parameters.

answered Apr 26, 2016 at 5:56

mubeen

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1 Comment

mubeen Over a year ago

@andro This will work. I am sorry, I was lazy. You have to figure out for other json fields like above "que" which is "ViewId": "56": { .... },....... },

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