HOW to parse JSON data using gson library in android

Question

Response from URL

[{
  "name": "Bread Bakery & Dairy Product",
  "url": "/images/bread.jpg",
  "id": "5"
}, {
  "name": "Baby Care",
  "url": "/images/baby.jpg",
  "id": "2"
}, {
  "name": "Beverages",
  "url": "/beverages.jpg",
  "id": "6"
}, {
  "name": "Breakfast",
  "url": "/breakfast.jpg",
  "id": "1"
}, {
  "name": "Cleaning",
  "url": "/cleaning.jpg",
  "id": "3"
}, {
  "name": "Kitchen",
  "url": "/images/kitchen.jpg",
  "id": "7"
}, {
  "name": "Others",
  "url": "/images/others.jpg",
  "id": "9"
}, {
  "name": "Personal Care",
  "url": "/images/personal_care.jpg",
  "id": "8"
}, {
  "name": "Snacks",
  "url": "/images/snacks.jpg",
  "id": "4"

}]

SuperCategory.java

public class SuperCategory {

    private int id;
    private String name;
    private String url;

    public SuperCategory() {
    }

    public SuperCategory(int id, String name, String url) {
        this.id = id;
        this.name = name;
        this.url = url;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }
}

and this my logic for JSOn parsing using gson.

List<SuperCategory> superCategories = new ArrayList<>();
GsonBuilder builder = new GsonBuilder();
Gson mGson = builder.create();
superCategories = Arrays.asList(mGson.fromJson(response.toString(), SuperCategory[].class));

But it is giving size 0 for superCategories.size().

Can someone help me what is wrong in parsing?

Try to use superCategories = mGson.fromJson(response.toString(), new TypeToken<List<SuperCategory>>() {}.getType()); — Allan Pereira
– Allan Pereira, Commented May 18, 2016 at 18:29
Thanks for response. I tried this. Still same. superCategories.size() is 0 only. — Devesh Agrawal
– Devesh Agrawal, Commented May 18, 2016 at 18:32
try this tutorial.............. androidhive.info/2016/05/… — Muhammad Waleed
– Muhammad Waleed, Commented May 18, 2016 at 18:33
I ran your code and was unable to reproduce your error. superCategories.size() is 9. — Michiyo
– Michiyo, Commented May 18, 2016 at 22:33

Sodiq · Accepted Answer · 2016-10-17 15:11:51Z

1

Try changes your code from

GsonBuilder builder = new GsonBuilder(); Gson mGson = builder.create();

become like this

Gson mGson = new Gson();

answered Oct 17, 2016 at 15:11

Sodiq

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