How to send Form data in retrofit2 android

finally i found the solution hope this will help some other

i achieve the solution by using FieldMap

of retrofit.

@POST("initiate")@FormUrlEncodedCall<UserInfoServerResponse> getUserInfoRequest(@FieldMap Map<String,String> params);

and in the Rest Adaptor section i changed request data from string to Hashmap form like following

Log.d(TAG, "sendUserInfo called");UserInfo mInfo = new UserInfo("countyname","android");String request = new Gson().toJson(mUserInfo);// Here the json data is add to a hash map with key dataMap<String,String> params = new HashMap<String, String>();params.put("data", request);Call<UserInfoServerResponse> api = mService.getUserInfoRequest(params);api.enqueue(new Callback<UserInfoServerResponse>() {    @Override    public void onResponse(Call<UserInfoServerResponse> responseCall, Response<UserInfoServerResponse> response) {        if (response.body().status != null) {            if (response.body().status.equals("success")) {                Log.d(TAG, "success---" + response.body());            }        } else {            Log.d(TAG, "Failed---");        }    }    @Override    public void onFailure(Call<UserInfoServerResponse> responseCall, Throwable t) {        t.printStackTrace();    }});

Basilcally what I used @FormUrlEncoded for form data and @FieldMap to put my request JSON as a key value. i got solution by following this method, hope this will help some one :)

The above solution works but is cumbersome to use , a better solution will be to use a converter for @Multipart formData

Please use the bellow code for proceeding with @Multipart FormDataThis is because

"" is added to your posting strings

import java.io.IOException;import java.lang.annotation.Annotation;import java.lang.reflect.Type;import okhttp3.MediaType;import okhttp3.RequestBody;import okhttp3.ResponseBody;import retrofit2.Converter;import retrofit2.Retrofit;/** * Created by kural on 10/27/17. */public class StringConverterFactory extends Converter.Factory {private static final MediaType MEDIA_TYPE = MediaType.parse("text/plain");public static StringConverterFactory create() {        return new StringConverterFactory();        }@Overridepublic Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {        if (String.class.equals(type)) {        return new Converter<ResponseBody, String>() {@Overridepublic String convert(ResponseBody value) throws IOException {        return value.string();        }        };        }        return null;        }@Overridepublic Converter<?, RequestBody> requestBodyConverter(Type type, Annotation[] parameterAnnotations, Annotation[] methodAnnotations, Retrofit retrofit) {    if (String.class.equals(type)) {        return new Converter<String, RequestBody>() {            @Override            public RequestBody convert(String value) throws IOException {                return RequestBody.create(MEDIA_TYPE, value);            }        };    }    return null;}}

and in your retrofit client add this line

.addConverterFactory(StringConverterFactory.create())

public class RetroFitClient {    private static Retrofit retrofit = null;    public static Retrofit getClient(String baseUrl) {        if (retrofit==null) {            HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);            OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();            /*retrofit = new Retrofit.Builder()                    .baseUrl(baseUrl)                    .client(client)                    .addConverterFactory(GsonConverterFactory.create())                    .build();*/            retrofit = new Retrofit.Builder()                    .baseUrl(baseUrl)                    .client(client)                    .addConverterFactory(StringConverterFactory.create())                    .addConverterFactory(GsonConverterFactory.create())                    .build();        }        return retrofit;    }

This works fine for me and return a json to obtain new valid Microsoft Azure Token :

My end point :

@PostMapping(value = "/get-new-token", consumes = {"application/JSON"}, produces = {"application/JSON"})@Timedpublic ResponseEntity<String> getNewToken(@RequestBody String refreshToken) throws IOException {    JSONObject json = tokenService.getNewTokenByRefreshToken(refreshToken);    return new ResponseEntity<>(json.toString(), HttpStatus.OK);}

My getGraphRepository :

public GraphRepository getGraphRepository() {    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);    OkHttpClient client = new OkHttpClient.Builder()        .addInterceptor(interceptor).build();    // Create and configure the Retrofit object    Retrofit retrofit = new Retrofit.Builder()        .baseUrl(" https://login.microsoftonline.com")        .client(client)        .addConverterFactory(JacksonConverterFactory.create())        .build();    // Generate the graph repo    return retrofit.create(GraphRepository.class);}

My Token Service :

public JSONObject getNewTokenByRefreshToken(String refreshToken) throws IOException {    GraphRepository graphRepository = getGraphRepository();    // My list of -> Key : Value    Map<String,String> params = new HashMap<String, String>();    params.put("grant_type", "refresh_token");    params.put("client_id", this.client_id);    params.put("client_secret", client_secret);    params.put("refresh_token", refreshToken);    RefreshToken data = graphRepository.getRefreshToken(tenantId, params).execute().body();    JSONObject json = new JSONObject(data);    return json;}

My GraphRepository :

@POST("/{tenant_id}/oauth2/v2.0/token")@FormUrlEncodedCall<RefreshToken> getRefreshToken(    @Path("tenant_id") String tenant_id,    @FieldMap Map<String, String> params);

I hope this can help someone.