Create JSON Array with object name android

Question

I want to create JSONArray like this

when i add json object in array it will format like this

My Code:

JSONObject object = new JSONObject();
object.put("calories_burn", "345");
object.put("time", dp.getTimestamp(TimeUnit.MILLISECONDS));
JSONObject object1 = new JSONObject();
object1.put("calories", object);
array.put(object1);

Create a list of json object with there identifier and transform the list into json array — Rod_Algonquin
– Rod_Algonquin, Commented Jan 24, 2017 at 19:08
i'm confused what you are trying to do. Are you trying to create an array and in that array an object with the name of android and withing that object a new array with steps, calories etc. Or is your array named android and you want it to contain objects steps, calories, bpm? — Some Dude
– Some Dude, Commented Jan 24, 2017 at 19:09
i want to create can you make this format as shown in first image. — Sohail Zahid
– Sohail Zahid, Commented Jan 24, 2017 at 19:13
@Rod_Algonquin how can i add identifier to a json object? i dint find any method for that? — Sohail Zahid
– Sohail Zahid, Commented Jan 24, 2017 at 19:19

DusteD · Accepted Answer · 2017-01-24 19:22:59Z

2

You are falling in between two patterns, you can either use it as a map, or an array.

Map approach:

{
  "steps": { "steps":123, "time": 123 },
  "calories": { and so},
  "bpm": { on }
}

Code (untested, think and tweak)

// Build your objects
JSONObject steps = new JSONObject();
steps.put("steps", 123);
steps.put("time" 123);
JSONObject calories = new JSONObject();
//And so on
JSONObject bpm = new JSONObject();

//Make a map
JSONObject map = new JSONObject();
//Add to the map:
map.put("steps", steps);
map.put("calories", calories);
map.put("bpm", bpm);

edited Jan 24, 2017 at 19:22

answered Jan 24, 2017 at 19:11

DusteD

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3 Comments

Sohail Zahid Over a year ago

how can i do this in java

Sohail Zahid Over a year ago

its still not created array {"steps":{"steps":"27200","time":1485287743921},"calories":{"calories_burn":4953,"time":1485287743921},"bpm":{"bpm":83,"time":1485287743921}}

DusteD Over a year ago

I already told you that you can either chose to do an array or a map, you already succeeded in making an array, and I showed you how to make a map, the code you show me is exactly as shown in my example. What you ask for in your example, is not valid json.

z3n105 · Accepted Answer · 2017-01-24 20:03:13Z

No, you cannot add keys inside a JSONArray. You can do that inside a JSONObject though.

Two approaches:

With JSONArray (Acts Like A List):

JSONArray jsonArray = new JSONArray();

JSONObject caloriesJSON = new JSONObject();
caloriesJSON.put("calories_burn", 345);
caloriesJSON.put("time", dp.getTimestamp(TimeUnit.MILLISECONDS));

JSONObject stepsJSON = new JSONObject();
stepsJSON.put("steps", "12121");
stepsJSON.put("time", dp.getTimestamp(TimeUnit.MILLISECONDS));

jsonArray.put(stepsJSON);
jsonArray.put(caloriesJSON);

With JSONObject(Acts Like A Map/Dictionary):

JSONObject jsonObject = new JSONObject();

JSONObject caloriesJSON = new JSONObject();
caloriesJSON.put("calories_burn", 345);
caloriesJSON.put("time", dp.getTimestamp(TimeUnit.MILLISECONDS));

JSONObject stepsJSON = new JSONObject();
stepsJSON.put("steps", "12121");
stepsJSON.put("time", dp.getTimestamp(TimeUnit.MILLISECONDS));

jsonObject.put("steps",  stepsJSON);
jsonObject.put("calories", caloriesJSON);

Be careful what you put for values. "12313" is a String whereas 345 is an integer.

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