Android Retrofit return status 500 internal server error

Question

I am using Retrofit like this to get all the books and delete all the books.

 @GET(\"/books\")
    BookListResponse getAllBooks();
    @DELETE(\"/clean\")
           


        

Answer 1

Just add the header accept in the request as follow:

Request request = new Request.Builder()
                .url(urlString)
                .header("accept", "application/json")
                .build();