Custom error handling CallAdapter for Retofit2 + RxJava2

Question

Server sends response in case of success (code 2xx):

{
    "user":"User",
    "age":16
}

And in case of fail (4xx) the following Json is sent inside errorBody :

{
    "errorMessage":"Server is not working",
    "action":{
         ...
    }
}

I am using Retrofit v2.4.0 and RxJava2.

How can I create custom CallAdapter for my case? I have read Square's ErrorHandlingAdapter but it was without RxJava2

Answer 1

it is highly recommended using same object because of enque of retrofit, you can do this using generic model

public class GenericResponseModel {
    public int statusCode;
    public String message;
    public Object data;
}

and then parse into a particular model in your onNetworkSuccess and onNetworkError something like this:

HomeModel homeModel = new Gson().fromJson(new Gson().toJson(genericResponseModel.data), HomeModel[].class);

using this approach you can make BaseModel and can treat with different responses too. I hope this is the answer that you are finding.

you can remove statusCode, message if no in response