Parsing JSON array with a sub-array with GSON?

Question

Say I have a JSON string like:

{"title":"aaa","url":"bbb","image":{"url":"ccc","width":"100","height":"200"}, ...

My accessor:

import com.google.gson.annotations.SerializedName;

public class accessorClass {

    @SerializedName("title")
    private String title;

    @SerializedName("url")
    private String url;

    @SerializedName("image")
    private String image;

    // how do I place the sub-arrays for the image here?
    ...


    public final String get_title() {
        return this.title;
    }

    public final String get_url() {
        return this.url;
    }

    public final String get_image() {
        return this.image;
    }

    ...

}

And my main:

            Gson gson = new Gson();
            JsonParser parser = new JsonParser();
            JsonArray Jarray = parser.parse(jstring).getAsJsonArray();

            ArrayList<accessorClass > aens = new ArrayList<accessorClass >();

            for(JsonElement obj : Jarray )
            {
                accessorClass ens = gson.fromJson( obj , accessorClass .class);
                aens.add(ens);
            }

What do you think would be the best way to get those sub-arrays for the image here?

Chris.Jenkins · Accepted Answer · 2012-03-13 15:59:15Z

3

FYI if your JSON is an array: {"results:":[{"title":"aaa","url":"bbb","image":{"url":"ccc","width":"100","height":"20...},{}]}

Then you need a wrapper class:

class WebServiceResult {
    public List<AccessorClass> results;
}

If your JSON isn't formatted like that, then your For loop you created will do it, (if not a little clunky, would be better if your JSON is formed like above).

Create an Image class

class ImageClass {
    private String url;
    private int width;
    private int height;

    // Getters and setters
}

Then change your AccessorClass

    @SerializedName("image")
    private ImageClass image;

    // Getter and setter

Then GSON the incoming String

Gson gson = new Gson();
AccessorClass object = gson.fromJson(result, AccessorClass.class);

Job done.

answered Mar 13, 2012 at 15:59

Chris.Jenkins

13.2k4 gold badges64 silver badges63 bronze badges

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

1 Comment

Chris.Jenkins Over a year ago

No problem.. added a bit more to it to explain how your json should be formatted but should work as you had it. :)

Collectives™ on Stack Overflow

Parsing JSON array with a sub-array with GSON?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related