How to parse json with unknown keys in android

Question

Hi I am using retrofit to send and receive data from server.How to parse if the keys are different.

Can any one help me how to parse json with below keys.

{"users": {"19x1": "Admin","19x5": "Manager"}}

@TommySadiqHinrichsen how to can you please explain me in details — , Jun 02 '20 at 12:57
Does this answer your question? [How do I parse JSON in Android?](https://stackoverflow.com/questions/9605913/how-do-i-parse-json-in-android) — Machavity, Jun 02 '20 at 13:06
No. of iterations your `JSON` contains of an object doesn't matter, what matters is that can you make an object class of it to parse using `GSON`. — Lalit Fauzdar, Jun 02 '20 at 19:12
Does this answer your question? [Parse Dynamic Key Json String using Retrofit](https://stackoverflow.com/questions/33758601/parse-dynamic-key-json-string-using-retrofit) — Abdulmalek Dery, Jun 02 '20 at 20:02

norcal johnny · Answer 1 · 2020-06-02T13:35:25.903

1

The keys are not the problem the user should be an object

{ 
  "users": {
  "19x1": "Admin",
  "19x5": "Manager"
  }
}

Try the above code in any json validator to check.. ie https://jsonlint.com/

Updated to access the values:

<!DOCTYPE html>
<html>
<body>

<p>How to access nested JSON objects.</p>

<p id="demo"></p>

<script>
var myObj = { 
  "users": {
  "19x1": "Admin",
  "19x5": "Manager"
  }
}
document.getElementById("demo").innerHTML += myObj.users["19x1"];
</script>

</body>
</html>

and for Android:

JSONObject jsonString = {"users": {"19x1": "Admin","19x5": "Manager"}};

JSONObject obj1 = new JSONObject(jsonString);
JSONObject obj2=obj1.getJSONObject("users");
JSONObject obj3=obj2.getJSONObject("19x1");

System.out.println("The value is " + obj3);

edited Jun 02 '20 at 13:35

answered Jun 02 '20 at 11:52

norcal johnny

2,050
2
13
17

based on your changes, that is valid json.. check it on a json validator. – norcal johnny Jun 02 '20 at 12:11
how to parse this json – Jun 02 '20 at 12:15
Do you mean how to access the values? – norcal johnny Jun 02 '20 at 12:17
Not in html in android – Jun 02 '20 at 12:32
1

@norcaljohnny Your implementation is slick right but the OP is trying parse dynamic json keys using `Gson` library. That is just not possible. – AouledIssa Jun 02 '20 at 14:15
1

@AouledIssa no disrespect to the OP but the question has been re-edited about 5 times with a wee bit more info added each time..Earlier in the post it seemed as if it was an invalid json oversight, hence the other answers. But thank you for the comments :) – norcal johnny Jun 02 '20 at 14:57

AouledIssa · Answer 2 · 2020-06-02T18:44:58.183

0

Your json structure is not correct. Basically you are having an array of users but you return object that has two fields 19x1 and 19x2.

It's not possible to use Retrofit and Gson to parse a dynamic key response. The only way to do is to use Plain Json Parsing in Android. but you will need to know where is the data in the list so you can do something like.

jsonArray.getObject(index)

if you want to get a list of objects then change your json to this structure

"users": [
    {
        "role_id": "19x1",
        "description": "Admin"
    },
    {
        "role_id": "19x5",
        "description": "Manager"
    }
]

edited Jun 02 '20 at 18:44

answered Jun 02 '20 at 11:50

AouledIssa

2,528
2
22
39

How to parse please let me know – Jun 02 '20 at 12:39
are you looking to parse a list of users? I need to know cuz if it's the case then your json may be incorrect – AouledIssa Jun 02 '20 at 14:07
list of the users – Jun 02 '20 at 14:36

score 0 · Answer 3 · answered Jun 02 '20 at 12:00

0

The json you gave is not correct.It should be like this:

{"users": {"19x1": "Admin","19x5": "Manager"}}

You can check the accuracy of json object in here: https://www.bejson.com/

answered Jun 02 '20 at 12:00

Henry

86
2

Not a correct!! Gson doesn't work in this fashion. You need to know the parse model to be able to parse. Otherwise you will just have to parse using plain using plain java json parsing – AouledIssa Jun 02 '20 at 14:13

How to parse json with unknown keys in android

3 Answers3