Retrofit: Sending POST request with JSON Array

Question

I have JsonElement jsonElement object which I receive as response from my another GET request. jsonElement.toString(); looks like JSON array:

[{"Id":493,"Number":"380931112233","FriendNumber":"3806822233344"},{"Id":494,"Number":"380931112233","FriendNumber":"3806388886667"}]

I need to send this string via another POST request using Retrofit. How can I send jsonElement or String object via POST request? How should look declaration of my method? For example:

 @POST("/api/geo/getLoc")
    public void getFriendsLocation(/* something */,  Callback<JsonElement> response);

are you using spring mvc? there is annotation @RequestBody to do that in spring mvc — Channa Jayamuni
– Channa Jayamuni, Commented Sep 25, 2015 at 17:04
@neustart47: were you able to find solution to this? I am facing same problem. Not sure how I should pass json array. Any pointers would help! Thanks! — user2234
– user2234, Commented Jan 29, 2016 at 7:52
check my answer to similar question as yours..stackoverflow.com/questions/32775756/… — tsiro
– tsiro, Commented Mar 29, 2016 at 19:12

rcmalli · Accepted Answer · 2015-09-25 21:39:25Z

2

If you are sending data over request body your implementation should be like this:

Define model according to fields (CaseSensitive "Name" -> String Name etc )

set your api function also like that

@POST("/api/geo/getLoc")
public void getFriendsLocation(@Body YourClass classObject,   Callback<JsonElement> response);

Use directly your created class object on post request

getFriendsLocation(yourClassObjectThatIncludesFields, new Callback .... )

If your sending data over params You can do this with Gson.

Lets say you have a class that have fields like id , number and FriendNumber.Define a function :

public static Map<String, Object> getMapFromObject(Object o) {
    Gson gson = new Gson();
    Type stringObjectMap = new TypeToken<Map<String, Object>>() {
     }.getType();
    return gson.fromJson(gson.toJson(o), stringObjectMap);
}

set your api function also like that

@POST("/api/geo/getLoc")
public void getFriendsLocation(@QueryMap Map<String, Object>,     Callback<JsonElement> response);

When you are sending post request create object from your fields call this function like below here
```
getFriendsLocation(getMapFromObject(yourClassObjectThatIncludesFields), new Callback .... )
```

I didnt write whole code which includes class definition and Callback function because they are up to your customization. I assume that you need to send over body so try the first way.

edited Sep 25, 2015 at 21:39

answered Sep 25, 2015 at 18:01

rcmalli

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4 Comments

kkost Over a year ago

Thak you for your answer. I created a model class, after create an object of model class and handed it to getMapFromObject function. As result of work of this function i receive correct Map<String, Object> object. It looked like: [0]:"FriendNumber" -> "380935275259" [1]: "Number" -> "380936831127" [2]: "Id" -> "516.0". I saw that in debug mode. But as result of request i recieve: 500 Internal Server Error. Server work for sure right, so the problem in my code. What's can be wrong ?

rcmalli Over a year ago

Are you doing that string parsing by hand on serverside ? Are you expecting that fields at the body of request or as parameters ? If you can share example working post request using software like Postman or etc. I can help more.

kkost Over a year ago

I don't know how server side working,all time i communicate with it with JSON arrays. This this the example from Postman: snag.gy/JYwTu.jpg

rcmalli Over a year ago

I have edited answer according to that given extra information. You should implement the first way.

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