android facebook-login 연동 입니다.

Question

Failed to find byte code for com/facebook/android/Facebook$ServiceListener

오류가 뜹니다.  코드는 아래와 같습니다.

package com.example.kimyuhyeon;


import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;


import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;

import org.json.JSONObject;

import java.util.Arrays;

public class Login extends AppCompatActivity {
    CallbackManager callbackManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(this.getApplicationContext());
        setContentView(R.layout.activity_login);

        callbackManager = CallbackManager.Factory.create();

        LoginButton loginButton = (LoginButton)findViewById(R.id.btnLogin);
        loginButton.setReadPermissions("email");
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {

            public void onSuccess(LoginResult loginResult) {
                GraphRequest graphRequest = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                    @Override
                    public void onCompleted(JSONObject object, GraphResponse response) {
                        Log.v("result",object.toString());
                    }
                });

                Bundle parameters = new Bundle();
                parameters.putString("fields", "id,name,email,gender,birthday");
                graphRequest.setParameters(parameters);
                graphRequest.executeAsync();
            }

            @Override
            public void onCancel() {

            }
            @Override
            public void onError(FacebookException error) {
                Log.e("LoginErr",error.toString());
            }
        });

    }


}