Retrofit POST Method with Json data got error code 400 : Bad Request

Question

I would like to call a POST Method(Magento REST API) in Retrofit with a JSON data(provide JSON as JsonObject). For that, I call as follow from the postman and work fine for

Answer 1

Change your code to something like this, GsonConverterFactory converts a User object to json itself.

public interface APIService {
    @POST("seq/restapi/checkpassword")
    @Headers({
        "Content-Type: application/json;charset=utf-8",
        "Accept: application/json;charset=utf-8",
        "Cache-Control: max-age=640000"
    })
    Call savePost(@Body User user);
}

This is User Class:

public class User {
    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}