Как сохранить данные при смене ориентации в android

Есть приложение "Тестирование" ни как не получается сохранить данные при смене ориентации, вопросы начинаются заново. Пожалуйста, помогите сохранить данные при смене ориентации.

public class QuizActivityExam extends BaseActivity implements RewardedVideoAdListener, DialogUtilities.OnCompleteListener {
    private Activity mActivity;
    private Context mContext;
    private ImageButton mBtnSpeaker;
    private Button mBtnNext;
    private List<QuizModel> mItemList;
    ArrayList<String> mOptionList;
    ArrayList<String> mBackgroundColorList;
    private RecyclerView mRecyclerQuiz;
    private QuizAdapter mAdapter = null;
    private TextView mQuestionTextView;
    private TextView tvQuestionTitle;
    private int mQuestionsCount =10;
    private int mQuestionPosition = 0;
    private int mScore = 0, mWrongAns = 0, mSkip = 0;
    private int mLifeCounter = 10;
    private boolean mUserHasPressed = false;
    private boolean mIsSkipped = false, mIsCorrect = false;
    private String mQuestionText, mGivenAnsText, mCorrectAnsText;
    private ArrayList<ResultModel> mResultList;
    private RewardedVideoAd mRewardedVideoAd;
    private BeatBox mBeatBox;
    private List<SoundUtilities> mSounds;
    private boolean isSoundOn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initializeRewardedAds();
        loadRewardedVideoAds();
        initVar();
        initView();
        initFunctionality();
        initListener();
    }

    @Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
    }

    private void initVar() {
        mActivity = QuizActivityExam.this;
        mContext = mActivity.getApplicationContext();
        mItemList = new ArrayList<>();
        mOptionList = new ArrayList<>();
        mBackgroundColorList = new ArrayList<>();
        mResultList = new ArrayList<>();
        mBeatBox = new BeatBox(mActivity);
        mSounds = mBeatBox.getSounds();
    }

    private void initView() {
        setContentView(R.layout.activity_quiz_exam);
        mBtnSpeaker = (ImageButton) findViewById(R.id.btn_speaker);
        mBtnNext = (Button) findViewById(R.id.btn_next);
        mQuestionTextView = (TextView) findViewById(R.id.question_text);
        tvQuestionTitle = (TextView) findViewById(R.id.tvQuestionTitle);
        mRecyclerQuiz = (RecyclerView) findViewById(R.id.rvQuiz);
        mRecyclerQuiz.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        mAdapter = new QuizAdapter(mContext, mActivity, mOptionList, mBackgroundColorList);
        mRecyclerQuiz.setAdapter(mAdapter);
        initToolbar(true);
        setToolbarTitle(getString(R.string.site_menu_exam));
        enableUpButton();
        initLoader();
    }

    private void initFunctionality() {
        loadData();
    }

    private void loadData() {
        showLoader();
        isSoundOn = AppPreference.getInstance(mActivity).getBoolean(PrefKey.KEY_SOUND, true);
        setSpeakerImage();
        loadJson(AppConstant.QUESTION_FILE);
        loadJson(AppConstant.QUESTION_FILE5);
        loadJson(AppConstant.QUESTION_FILE2);
        loadJson(AppConstant.QUESTION_FILE4);
        loadJson(AppConstant.QUESTION_FILE3);
        loadJson(AppConstant.QUESTION_FILE6);
    }

    private void setSpeakerImage() {
        if (isSoundOn) {
            mBtnSpeaker.setImageResource(R.drawable.ic_speaker);
        } else {
            mBtnSpeaker.setImageResource(R.drawable.ic_speaker_not);
        }
    }


    public void initListener() {
        mBtnSpeaker.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                isSoundOn = !isSoundOn;
                AppPreference.getInstance(mActivity).setBoolean(PrefKey.KEY_SOUND, isSoundOn);
                setSpeakerImage();
            }
        });
        mBtnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!mUserHasPressed) {
                    FragmentManager manager = getSupportFragmentManager();
                    DialogUtilities dialog = DialogUtilities.newInstance(getString(R.string.skip_text), getString(R.string.skip_prompt), getString(R.string.yes), getString(R.string.no), AppConstant.BUNDLE_KEY_SKIP_OPTION);
                    dialog.show(manager, AppConstant.BUNDLE_KEY_DIALOG_FRAGMENT);
                } else {
                    updateResultSet();
                    setNextQuestion();
                }
            }
        });

        mAdapter.setItemClickListener(new ListItemClickListener() {
            @Override
            public void onItemClick(int position, View view) {
                if (!mUserHasPressed) {
                    int clickedAnswerIndex = position;
                    if (mItemList.get(mQuestionPosition).getCorrectAnswer() != -1) {
                        for (int currentItemIndex = 0; currentItemIndex < mOptionList.size(); currentItemIndex++) {
                            if (currentItemIndex == clickedAnswerIndex && currentItemIndex == mItemList.get(mQuestionPosition).getCorrectAnswer()) {
                                mBackgroundColorList.set(currentItemIndex, AppConstant.COLOR_GREEN);
                                mScore++;
                                mIsCorrect = true;
                                if (isSoundOn) {
                                    mBeatBox.play(mSounds.get(AppConstant.BUNDLE_KEY_ZERO_INDEX));
                                }
                            } else if (currentItemIndex == clickedAnswerIndex && !(currentItemIndex == mItemList.get(mQuestionPosition).getCorrectAnswer())) {
                                mBackgroundColorList.set(currentItemIndex, AppConstant.COLOR_RED);
                                mWrongAns++;
                                if (isSoundOn) {
                                    mBeatBox.play(mSounds.get(AppConstant.BUNDLE_KEY_SECOND_INDEX));
                                }
                                decreaseLifeAndStatus();
                            } else if (currentItemIndex == mItemList.get(mQuestionPosition).getCorrectAnswer()) {
                                mBackgroundColorList.set(currentItemIndex, AppConstant.COLOR_GREEN);
                                ((LinearLayoutManager) mRecyclerQuiz.getLayoutManager()).scrollToPosition(currentItemIndex);
                            }
                        }
                    } else {
                        mBackgroundColorList.set(clickedAnswerIndex, AppConstant.COLOR_GREEN);
                        mScore++;
                        mIsCorrect = true;
                    }

                    mGivenAnsText = mItemList.get(mQuestionPosition).getAnswers().get(clickedAnswerIndex);
                    mCorrectAnsText = mItemList.get(mQuestionPosition).getAnswers().get(mItemList.get(mQuestionPosition).getCorrectAnswer());

                    mUserHasPressed = true;
                    mAdapter.notifyDataSetChanged();
                }
            }

        });

    }

    public void initializeRewardedAds() {
        MobileAds.initialize(getApplicationContext(), getResources().getString(R.string.app_ad_id));

        mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(this);
        mRewardedVideoAd.setRewardedVideoAdListener(this);
    }

    private void loadRewardedVideoAds() {
        mRewardedVideoAd.loadAd(getResources().getString(R.string.rewarded_ad_unit_id),
                new AdRequest.Builder().build());
    }

    @Override
    public void onRewardedVideoAdLoaded() {
    }

    @Override
    public void onRewardedVideoAdOpened() {

    }

    @Override
    public void onRewardedVideoStarted() {

    }

    @Override
    public void onRewardedVideoAdClosed() {
        loadRewardedVideoAds();
    }

    @Override
    public void onRewarded(RewardItem rewardItem) {
        increaseLifeAndStatus();
        updateResultSet();
        setNextQuestion();
    }

    @Override
    public void onRewardedVideoAdLeftApplication() {

    }

    @Override
    public void onRewardedVideoAdFailedToLoad(int i) {
    }

    @Override
    public void onRewardedVideoCompleted() {

    }

    @Override
    public void onResume() {
        mRewardedVideoAd.resume(this);
        // load full screen ad
        //AdsUtilities.getInstance(mContext).loadFullScreenAd(mActivity);
        super.onResume();
    }

    @Override
    public void onPause() {
        mRewardedVideoAd.pause(this);
        super.onPause();
    }

    @Override
    public void onDestroy() {
        mRewardedVideoAd.destroy(this);
        super.onDestroy();
    }

    public void decreaseLifeAndStatus() {
        mLifeCounter--;
    }

    void increaseLifeAndStatus() {
        if (mLifeCounter < 10) {
            mLifeCounter = 10;
        }
    }

    public void updateResultSet() {
        mResultList.add(new ResultModel(mQuestionText, mGivenAnsText, mCorrectAnsText, mIsCorrect, mIsSkipped));
        mIsCorrect = false;
        mIsSkipped = false;
    }

    public void setNextQuestion() {
        if (isSoundOn) {
            mBeatBox.play(mSounds.get(AppConstant.BUNDLE_KEY_FIRST_INDEX));
        }
        mUserHasPressed = false;
        if (mQuestionPosition < mItemList.size() - 184 && mLifeCounter > 0) {
            mQuestionPosition++; // load full screen ad
            //AdsUtilities.getInstance(mContext).loadFullScreenAd(mActivity);

            if (mQuestionPosition % AppConstant.ADS_INTERVAL == 0) {
                // show full-screen ads
                // AdsUtilities.getInstance(mContext).showFullScreenAd();
            }
            updateQuestionsAndAnswers();
        } else if (mQuestionPosition < mItemList.size() - 184 && mLifeCounter == 0 && mRewardedVideoAd.isLoaded()) {
            FragmentManager manager = getSupportFragmentManager();
            DialogUtilities dialog = DialogUtilities.newInstance(getString(R.string.reward_dialog_title), getString(R.string.reward_dialog_message), getString(R.string.yes), getString(R.string.no), AppConstant.BUNDLE_KEY_REWARD_OPTION);
            dialog.show(manager, AppConstant.BUNDLE_KEY_DIALOG_FRAGMENT);
        } else {
            ActivityUtilities.getInstance().invokeScoreCardActivity(mActivity, ScoreCardActivity.class, mScore, mWrongAns, mSkip, mResultList, true);
        }
    }

    public void updateQuestionsAndAnswers() {
        mOptionList.clear();
        mBackgroundColorList.clear();
        ((LinearLayoutManager) mRecyclerQuiz.getLayoutManager()).scrollToPosition(AppConstant.BUNDLE_KEY_ZERO_INDEX);

        mOptionList.addAll(mItemList.get(mQuestionPosition).getAnswers());
        mBackgroundColorList.addAll(mItemList.get(mQuestionPosition).getBackgroundColors());
        mAdapter.notifyDataSetChanged();

        mQuestionTextView.setText(Html.fromHtml(mItemList.get(mQuestionPosition).getQuestion()));

        mQuestionText = mItemList.get(mQuestionPosition).getQuestion();
        tvQuestionTitle.setText(getString(R.string.quiz_question_title, mQuestionPosition + 1, mQuestionsCount));
    }

    public void quizActivityClosePrompt() {
        FragmentManager manager = getSupportFragmentManager();
        DialogUtilities dialog = DialogUtilities.newInstance(getString(R.string.exit), getString(R.string.quiz_close_prompt), getString(R.string.yes), getString(R.string.no), AppConstant.BUNDLE_KEY_CLOSE_OPTION);
        dialog.show(manager, AppConstant.BUNDLE_KEY_DIALOG_FRAGMENT);
    }

    private void loadJson(String filePath) {
        StringBuffer sb = new StringBuffer();
        BufferedReader br = null;
        try {
            //todo: заменить QUESTION_FILE
            br = new BufferedReader(new InputStreamReader(getAssets().open(filePath)));
            String temp;
            while ((temp = br.readLine()) != null)
                sb.append(temp);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        parseJson(sb.toString());
    }

    public void parseJson(String jsonData) {
        try {

            JSONObject jsonObjMain = new JSONObject(jsonData);
            JSONArray jsonArray = jsonObjMain.getJSONArray(AppConstant.JSON_KEY_QUESTIONNAIRY);

            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObj = jsonArray.getJSONObject(i);

                String question = jsonObj.getString(AppConstant.JSON_KEY_QUESTION);
                int correctAnswer = Integer.parseInt(jsonObj.getString(AppConstant.JSON_KEY_CORRECT_ANS));

                JSONArray jsonArray2 = jsonObj.getJSONArray(AppConstant.JSON_KEY_ANSWERS);
                ArrayList<String> contents = new ArrayList<>();
                ArrayList<String> backgroundColors = new ArrayList<>();
                for (int j = 0; j < jsonArray2.length(); j++) {
                    String item_title = jsonArray2.get(j).toString();
                    contents.add(item_title);
                    backgroundColors.add(AppConstant.COLOR_WHITE);
                }
                mItemList.add(new QuizModel(question, contents, correctAnswer, backgroundColors));
                Collections.shuffle(mItemList);
            }

            mQuestionsCount = 10;
            Collections.shuffle(mItemList);

            hideLoader();
            updateQuestionsAndAnswers();

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                quizActivityClosePrompt();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onBackPressed() {
        quizActivityClosePrompt();
    }

    @Override
    public void onComplete(Boolean isOkPressed, String viewIdText) {
        if (isOkPressed) {
            if (viewIdText.equals(AppConstant.BUNDLE_KEY_CLOSE_OPTION)) {
                ActivityUtilities.getInstance().invokeNewActivity(mActivity, PeriodActivity.class, true);
            } else if (viewIdText.equals(AppConstant.BUNDLE_KEY_SKIP_OPTION)) {
                mSkip++;
                mIsSkipped = true;
                mGivenAnsText = getResources().getString(R.string.skipped_text);
                mCorrectAnsText = mItemList.get(mQuestionPosition).getAnswers().get(mItemList.get(mQuestionPosition).getCorrectAnswer());
                updateResultSet();
                setNextQuestion();
            } else if (viewIdText.equals(AppConstant.BUNDLE_KEY_REWARD_OPTION)) {
                mRewardedVideoAd.show();
            }
        } else if (!isOkPressed && viewIdText.equals(AppConstant.BUNDLE_KEY_REWARD_OPTION)) {
            ActivityUtilities.getInstance().invokeScoreCardActivity(mActivity, ScoreCardActivity.class, mScore, mWrongAns, mSkip, mResultList, true);
        }
    }
}

Не как не получается сохранить данные при смене ориентации Activity каждый раз создается заново.
Помогите реализовать метод

@Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
    }