How to Post complex datas as MultiPart using Retrofit in Android?

Question

I have data which is Array of Json Objects, I need to pass this as MultiPart Form Data. The data which i need to post is below :

{
    "name": "KIMS EKM",
    "latitude": "8.5605418",
    "longitude": "76.8810471",
    "state": "Kerala",
    "district": "Thiruvananthapuram",
    "city": "Leela Infopark",
    "landmark": "Kazhakuttom",
    "phone": "7293318484",
    "email": "aswin.as@velosit.in",
    "admin_name": "Aswin",
    "admin_phone": "7293318484",
    "admin_email": "aswin.a.s@velosit.in",
    "departments": [{
        "id": 1,
        "is_sunday": 1
    }, {
        "id": 2,
        "is_sunday": 1
    }, {
        "id": 3,
        "is_sunday": 1
    }, {
        "id": 4,
        "is_sunday": 1
    }, {
        "id": 5,
        "is_sunday": 1
    }, {
        "id": 6,
        "is_sunday": 1
    }, {
        "id": 7,
        "is_sunday": 1
    }, {
        "id": 8,
        "is_sunday": 1
    }, {
        "id": 9,
        "is_sunday": 0
    }, {
        "id": 10,
        "is_sunday": 0
    }, {
        "id": 11,
        "is_sunday": 0
    }],
    "all_day_service": [3, 4, 5],
    "emergency_services": [5],
    "special_services": ["BPD", "HCDX"],
    "accreditations": [2, 3]
}

Here the exact keys are used as params for multipart form Data. There are image needed to be posted, But the real problem is described below.

I have posted MultiPart form datas, but posting array of json objects is what i find tough. How can the "departments" & "all_day_service" field can be posted ?

can you add your web service interface class with your question? — Rajasekaran M, Jul 17 '19 at 06:16
I havent actually created it, but the problem here is how shall i add @Part for "departments" — Aswin .A.S, Jul 17 '19 at 06:21
you have to convert the jsonarray to string then add to your body — Rajasekaran M, Jul 17 '19 at 06:22
@RajasekaranM Can you help? https://stackoverflow.com/questions/62783444/why-does-multipart-pdf-is-not-able-to-upload-in-api-using-retrofit-2-in-android?noredirect=1#comment111031344_62783444 — Priyanka Singh, Jul 08 '20 at 07:36

score 1 · Answer 1 · answered Jul 17 '19 at 06:26

1

You have to make models of data parts and it should look something like this:


 @Multipart
    @POST("request")
    Call<ResponseBody> upload(
        @Part("item1") RequestBody item1,
        @Part("item2") RequestBody item2,
        @Part("item3") RequestBody item3
    );

Also there is @PartMap Map<String, RequestBody> map

answered Jul 17 '19 at 06:26

Antonis Radz

3,036
1
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This works for name, latitude, longitude. But the problem is how shall I write @Part for "departments" ? – Aswin .A.S Jul 17 '19 at 06:35
"departments" cannot be just posted as String. We can convert array of objects to string and just post it. But that isn't correct method right ? – Aswin .A.S Jul 17 '19 at 06:37
If I understand correct then you need to make a data model Department and send List as multi part – Antonis Radz Jul 17 '19 at 07:01
Just remember, if you want to send arrays of Strings, Integers etc you have the solution here https://stackoverflow.com/a/53832681/3809653 – ArbenMaloku Jul 17 '19 at 07:55
What about Array of custom objects as in the JSON! How to solve it – Aswin .A.S Jul 17 '19 at 08:12

score 0 · Answer 2 · answered Jul 17 '19 at 07:44

    -----------------------------------com.example.Department.java-----------------------------------

package com.example;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Department {

@SerializedName("id")
@Expose
public Integer id;
@SerializedName("is_sunday")
@Expose
public Integer isSunday;

}
-----------------------------------com.example.ResponseContracts.java-----------------------------------

package com.example;

import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class ResponseContracts {

@SerializedName("name")
@Expose
public String name;
@SerializedName("latitude")
@Expose
public String latitude;
@SerializedName("longitude")
@Expose
public String longitude;
@SerializedName("state")
@Expose
public String state;
@SerializedName("district")
@Expose
public String district;
@SerializedName("city")
@Expose
public String city;
@SerializedName("landmark")
@Expose
public String landmark;
@SerializedName("phone")
@Expose
public String phone;
@SerializedName("email")
@Expose
public String email;
@SerializedName("admin_name")
@Expose
public String adminName;
@SerializedName("admin_phone")
@Expose
public String adminPhone;
@SerializedName("admin_email")
@Expose
public String adminEmail;
@SerializedName("departments")
@Expose
public List<Department> departments = null;
@SerializedName("all_day_service")
@Expose
public List<Integer> allDayService = null;
@SerializedName("emergency_services")
@Expose
public List<Integer> emergencyServices = null;
@SerializedName("special_services")
@Expose
public List<String> specialServices = null;
@SerializedName("accreditations")
@Expose
public List<Integer> accreditations = null;

}

http://www.jsonschema2pojo.org/ From here, you make a model, send request by @body

@POST("/api/v1/post url here")
Call<Response> registerUser(@Body ResponseContracts body);

Since the registerUser method is not annotated with @Multipart, can this be used with multipart form data ? — Aswin .A.S, Jul 17 '19 at 07:48
Yes. I'm actually using it! Can you share me a tutorial on how to solve this — Aswin .A.S, Jul 17 '19 at 08:11

How to Post complex datas as MultiPart using Retrofit in Android?

2 Answers2