How to POST data with retrofit and get the response in proper format?

Question

I am getting the exception

java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 2 column 1 path $

when called a POST request.

According to this answer my json response do have the curly braces {}.

first my json response was-

{
    "status": {
        "status": "1",
        "message": "Entry inserted successfully"
    },
    "data": {
        "date": "24-Mar-2226",
        "month": "March",
        "party_name": "mark"
    }
}

then I combined the two separate objects in a single response object-

{
   "response": {
       "status": {
           "status": "1",
           "message": "Entry inserted successfully"
       },
       "data": {
           "date": "24-Mar-2226",
           "month": "March",
           "party_name": "mark"
       }
   }
}

but still I am getting the same error.

The GET request with retrofit is working fine but not the POST request.

This is my POST query-

  @POST("AddEntry")
    Call<ResponseClass> addMyEntry(@Body DetailsClass details);

sry i want to see what your sending in your details Log that details — Ashish, Jan 22 '19 at 10:06
sorry but I am not understanding exactly what you want @Ashish — Makarand, Jan 22 '19 at 10:13

score 0 · Answer 1 · answered Jan 22 '19 at 10:19

The exception says that a property you marked with String type but in the JSON it is an object.

With the JSON is:

{
   "response": {
       "status": {
           "status": "1",
           "message": "Entry inserted successfully"
       },
       "data": {
           "date": "24-Mar-2226",
           "month": "March",
           "party_name": "mark"
       }
   }
}

You should have some classes as below:

public class Response {
 @SerializedName("status")
 public Status status;

 @SerializedName("data")
 public Data data;
}

public class Status {
 @SerializedName("status")
 public String status;

 @SerializedName("message")
 public String message;
}

public class Data {
 @SerializedName("date")
 public String date;

 @SerializedName("month")
 public String month;

 @SerializedName("party_name")
 public String party_name;
}

I tried clean and rebuild project and also Invalidate Caches/Restart, but didn't work. — Makarand, Jan 22 '19 at 11:08

score 0 · Answer 2 · answered Jan 22 '19 at 11:13

Please use below class structure.

This problem is common for most of developer just understand structure and move on.

public class ResponseData {
 @SerializedName("response")
  public Response response;
 }

  public class Response {
 @SerializedName("status")
 public Status status;

 @SerializedName("data")
 public Data data;
}

public class Status {
 @SerializedName("status")
 public String status;

 @SerializedName("message")
 public String message;
}

public class Data {
 @SerializedName("date")
 public String date;

 @SerializedName("month")
 public String month;

 @SerializedName("party_name")
 public String party_name;
}

How to POST data with retrofit and get the response in proper format?

2 Answers2