How to retrieve data from response? - Retrofit 2

Question

the response from the server as below:

{
    success: true,
    token: "someRandomToken"
}

How can I retrieve token from the response?

I tried to follow the solution provided here but I can't add generic to the Call inside onResponse method

EDIT

Here is my method

public void loginUser(final Context context, String url, String username, String passowrd, loginJson loginjson) {

        final MediaType JSON
                = MediaType.parse("application/json; charset=utf-8");

        loginjson.setUsername(username);
        loginjson.setPassword(passowrd);

        Gson gson = new Gson();

        String jsonFromForm = gson.toJson(loginjson);

        OkHttpClient client = new OkHttpClient();
        RequestBody body = RequestBody.create(JSON, jsonFromForm);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .addHeader("content-type", "application/json; charset=utf-8")
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                System.out.println("Failure!!");
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {
                if(response.isSuccessful()) {
                    if (context != null) {
                        new Handler(Looper.getMainLooper()).post(new Runnable() {

                            @Override
                            public void run() {
                                if(response.body() != null){

                                }
                            }
                        });
                    }
//
                } else {
                    if (context != null) {
                        new Handler(Looper.getMainLooper()).post(new Runnable() {

                            @Override
                            public void run() {
                                Toast.makeText(context, context.getResources().getString(R.string.failed_to_login),
                                        Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                }
            }

        });


    }

After implementing @Piyush Patel answer: I change the Call and the Response to retrofit2.Call<tokenRetrieved> and retrofit2.Reponse<tokenRetrieved> respectively. but the Callback in my enqueue prompt an error asking me to implement its onResponse and onFailure methods

newbie question: Am I using retrofit1 methods?!!

First of all you are using okhttp for requesting API you need to import compile 'com.squareup.retrofit2:retrofit:2.2.0' compile 'com.squareup.okhttp3:okhttp:3.6.0' compile 'com.squareup.retrofit2:converter-gson:2.1.0' dependency in your app.gradle to use retrofit — Piyush Patel, May 11 '17 at 10:03
Its My pleasure..! if you have any query regarding retrofit just ask here I will respond you. — Piyush Patel, May 11 '17 at 10:18
to parse data on response success does job for you with OkHttpClient if(response.body() != null){ JsonResponse jsonResponse=gson.fromJson(response.body(), JsonResponse.class); } — Piyush Patel, May 11 '17 at 11:13

score 4 · Answer 1 · edited May 11 '17 at 10:35

4

Here is a snippet that shows how you can implement it using GSON

public class JsonResponse {

    public String success;
    public String token;

    public JsonResponse(String success, String token) {
        this.success = success;
        this.token = token;
    }
}

Call<JsonResponse> call = api.checkLevel(1);
        call.enqueue(new Callback<JsonResponse>() {
            @Override
            public void onResponse(Call<JsonResponse> call, Response<JsonResponse> response) {
                if (response.isSuccessful()) {
                    JsonResponse jsonResponse=response.body();
                }
            }

            @Override
            public void onFailure(Call<JsonResponse> call, Throwable t) {
            }
        });

edited May 11 '17 at 10:35

Jonas

6,915
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answered May 11 '17 at 09:16

Piyush Patel

371
1
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13

I get the following error when I add to the call. "Type okhttp3.Callback does not have type parameter" – Behrouz Riahi May 11 '17 at 09:43
Show me what you have done? otherwise above snippet work perfectly for you. – Piyush Patel May 11 '17 at 09:46
1

You should use retrofit2.Callback instead of okhttp3.Callback. Check your imports – Jeremy May 11 '17 at 09:47

Mohit Singh · Answer 2 · 2017-05-11T10:16:01.313

Using

Volley u can do so

Try this code

public void onResponse(String response) {

                    try {
                        JSONObject object=new JSONObject(response);
                        if ((object.getBoolean("success"))==true){
                            String Token=object.getString("token");
                        }else{
                            // enter else condition
                        }


                    } catch (JSONException e) {
                        e.printStackTrace();

                    // json Exception

                    }

                }

Denny · Answer 3 · 2017-05-11T09:12:17.560

0

Create a JSONObject from your response string and to get the string with the key token use

JSONObject json = new JSONObject(response);
json.getString("token");

edited May 11 '17 at 09:12

answered May 11 '17 at 09:10

Denny

1,766
3
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if you have background about gson can I use it instead of JSONObject?, thanks ! – Behrouz Riahi May 11 '17 at 09:12
Yes you can, plus GSON is more convenient for retrofit – Arthur Attout May 11 '17 at 09:14

How to retrieve data from response? - Retrofit 2

3 Answers3

Using