Retrofit error expected BEGIN_OBJECT but was BEGIN_ARRAY

Question

How can i parse this using retrofit? i'm getting the error BEGIN_OBJECT but was BEGIN_ARRAY

Right now, i'm parsing it this way..

Below is the adapter class

 public static RetroInterface getCommonPathInterface() {
        RestAdapter restAdapter = new RestAdapter.Builder()
                .setEndpoint("myurl")
                .build();
        records= restAdapter.create(RetroInterface.class);
        return records;
    }

Below is the interface, RetroInterface.class

 @GET("/mypath")
        void getValue(

                Callback<MyBean> callback    
        );

This is how i call it in the main activity

 getCommonPathInterface().getValue(new Callback<MyBean>() {
@Override
                    public void success(MyBean myBean, Response response) {
                       inti = 0;

                    }

                    @Override
                    public void failure(RetrofitError error) {
                        int i = 0;
                    }

                });

Below is the json response

 [
    {
    id: "111",
    name: "Val1"
    },
    {
    id: "222",
    name: "Val2"
    }
    ]

please share your current json parsing code block. otherwise nobody can help you. From error message, it is very clear it is expecting a JSON Object as the root object, but it is getting a JSON array as the root one. — Amit K. Saha
– Amit K. Saha, Commented Apr 4, 2015 at 8:41
What are you used for parsing the JSON. Retrofit uses Gson by default to convert HTTP bodies to and from JSON — Bhavdip Sagar
– Bhavdip Sagar, Commented Apr 4, 2015 at 8:59
Yup, its the default retrofit GSON. As of now i ain't doing anything from my side. Have used around 9 service calls, all worked fine...except for this JSON response. — LEE
– LEE, Commented Apr 4, 2015 at 9:03

LEE · Accepted Answer · 2015-04-04 09:37:43Z

2

Yippi ! Got it working. Very simple solution. A small change in my callback method.

Instead of Callback<MyBean> callback used Callback<MyBean[]> callback. Problem solved ! :)

answered Apr 4, 2015 at 9:37

LEE

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1 Comment

Aman Aalam Over a year ago

Wow, it was simple and didn't require a server change. Great! Tanks Abhilash!

Bhavdip Sagar · Accepted Answer · 2015-04-04 09:07:22Z

1

Hi Right now you are parsing the response as if it was formatted like this:

{
   "contacts":[
      {
         "id":"111",
         "name":"Val1"
      },
      {
         "id":"222",
         "name":"Val2"
      }
   ]
}

The exception tells you this in that you are expecting an object at the root but the real data is actually an array. This means you need to change the type to be an array to JSON object.

Thank you.

answered Apr 4, 2015 at 9:07

Bhavdip Sagar

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4 Comments

LEE Over a year ago

You mean to say that i need to change the server side code in such a way that instead of a JSON array, it should start the response with a JSON object, right? Can i do something on the client side?

Kunu Over a year ago

Yes you can parse whatever server send you if it is in valid json format.

Bhavdip Sagar Over a year ago

Yes suppose to you need to change over the server side so it would return the response in json object instead of a JSON array.

LEE Over a year ago

Thanks Bhavdip. But if possible can something be done via GSON converter, etc? I'm trying to avoid the server thing right now.

Bruno Carrier · Accepted Answer · 2015-04-04 08:41:05Z

0

I'm new to retrofit, but I was having this issue when I was dealing with a multi-class POJO and using code designed for a single-class POJO. Let me know if that's the case. Also, please paste a bit of code! :)

answered Apr 4, 2015 at 8:41

Bruno Carrier

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1 Comment

Amit K. Saha Over a year ago

I think, its not a nice answer but definitely it would be a very nice comment.

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