Wsrtjtyk

when i use retrofit .I got the exception java.lang.NoClassDefFoundError: Failed resolution of: Lokio/Buffer;i use okhttpclient in order to set header for retrofit.get userList is a post method,and i need to send body in request.

private void getUserList(int startIndex){

    final JSONObject audienceObj = ProtocolHelper.getProtocolUtils(mContext).getUserlistJsonObj(mRoomData.mUid, mRoomData.mRoomId, startIndex);

    OkHttpClient okClient = new OkHttpClient.Builder()

    .addInterceptor(

        new Interceptor() {

          @Override

          public okhttp3.Response intercept(Interceptor.Chain chain) throws IOException {

                Request original = chain.request();



                // Request customization: add request headers

                Request.Builder requestBuilder = original.newBuilder()

                        .header("sessionId", CommonData.getUserInfo(mContext).sessionId);

                Request request = requestBuilder.build();

                return chain.proceed(request);

            }

        })

    .build();





    String baseUrl = ProtocolUtils.BASE_URL+"/";

    Retrofit retrofit = new Retrofit.Builder()

    .baseUrl(baseUrl)

    .addConverterFactory(GsonConverterFactory.create())

    .client(okClient)

    .build();



    String audienceUrl = ProtocolHelper.getProtocolUtils(mContext).getProtocolUrl(ProtocolUtils.PROTOCOL_MSG_ID_MEMBER_LIST);

    AudienceInterface audienceInterface = retrofit.create(AudienceInterface.class);

    Call<String> call = audienceInterface.getAudienceList(audienceUrl,audienceObj);

    call.enqueue(new Callback<String>() {

        @Override

        public void onResponse(Call<String> call, Response<String> response) {

            Log.d(TAG, "onResponse");

        }



        @Override

        public void onFailure(Call<String> call, Throwable t) {

            Log.d(TAG, "onFailure"+t.getMessage());

        }

    });

}



public interface AudienceInterface {



@POST("{url}")

Call<String>getAudienceList(@Path("url") String url,@Body JSONObject boder);

}

the log t.getMessage is :java.lang.NoClassDefFoundError: Failed resolution of: Lokio/Buffer;

Alright.~I found this error last time too.

By this:
NoClassDefFoundError: Failed resolution of: Lokio/Buffer

You could lost another jar lib--Okio.

You can download the jar file from github:
https://github.com/square/okio

And append this lib to your project.

I solved it by adding:

implementation 'com.squareup.okio:okio:2.1.0'

in dependencies under build.gradle(Module: app).