Android - JSON - How to create JSON that has X objects and an array inside each one of them

Question

I need to produce a JSON with many objects inside, and each of them to have an array of strings. I'm using Java, more specifically Android.

I want to produce something like the following:

"manager1": [
        {"product1":"xxxx"},
        {"product2":"yyyy"},
        {"product3":"zzzz"}
    ],
"manager2": [
        {"product1":"xxxx"},
        {"product2":"yyyy"},
        {"product3":"zzzz"}
    ]

I have a Bean class which has this manager and array of products information, am just having trouble to see how that would fit inside my AsyncTask class

OneCricketeer · Accepted Answer · 2016-12-08 17:31:46Z

1

I would recommend not appending numbers to your keys. That just messes up your java classes.

Use lists for everything.

{ 
    "managers": [
        {
            "name": "manager1",
            "products": ["xxx", "yyy", "zzz"]
        }, 
        {
            "name": "manager2",
            "products": ["xxx", "yyy", "zzz"]
        }
    ]
}

You POJOs / beans would look like so

class Foo {
    List<Manager> managers;
}

class Manager {
    String name;
    List<String> products;
}

answered Dec 8, 2016 at 17:31

OneCricketeer

193k20 gold badges146 silver badges276 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Guigs Over a year ago

Thank you for the answer, very elucidative

Mangesh Over a year ago

@Guilherme Please mark the answer as "Accepted" if it has solved your issue.

Guigs Over a year ago

@Mangesh Done. Could you help me with one more thing? I'm not sure how I'll pass all these Lists through my AsyncTask to become String... params

OneCricketeer Over a year ago

@Guigs You only need to pass one Foo object or one JSONObject class. new WebTask().execute(obj);... Or, instead you can use Volley or Retrofit, which are easier to mess with than AsyncTask once you learn them

Community · Accepted Answer · 2017-05-23 12:30:32Z

0

If you have objects you can use Gson library to convert object into json string.

Gson gson = new Gson();
String json = gson.toJson(obj);

If you ask about structure of classes in your Java code it will be the Map of the android.util.Pair arrays.

Map<String, Pair<String, String>[]> map;

But.... you have to create your own serializer and deserializer for Pair class. The answer you can find here: How do I get Gson to serialize a list of basic name value pairs?

edited May 23, 2017 at 12:30

CommunityBot

11 silver badge

answered Dec 8, 2016 at 17:45

Matt Twig

4443 silver badges8 bronze badges

Collectives™ on Stack Overflow

Android - JSON - How to create JSON that has X objects and an array inside each one of them

2 Answers 2

4 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related