CODEWITHSUNDEEP
androidarraysjson
Guigs
Guigs

Reputation: 25

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

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

Upvotes: 0

Views: 62

Answers (2)

Matt Twig
Matt Twig

Reputation: 444

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?

Upvotes: 0

OneCricketeer
OneCricketeer

Reputation: 191983

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;
}

Upvotes: 1

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