public void populateAd(final NativeAd nativeAd) {
    final NativeAdView view = findViewById(R.id.native_ad_view);

    final Ad ad = nativeAd.getAd();

   final Creative.Type creativeType = ad.getCreative() == null ? null : ad.getCreative().getType();// create ad component
    ...생략...
    
    final YourCtaView ctaView = view.findViewById(R..(생략)...id.your_cta_view);
    // View를 상속받는 CustomCtaView class를 생성하여 원하는 모양의 CtaView를 사용 할 수 있습니다.updateCtaStatus(ctaView, nativeAd);
    
    ...생략...

    final CustomCtaViewList<View> customizedCtaViewclickableViews = view.findViewById(R.id.customCtaViewnew ArrayList<>();
     // 아래 정보를 이용하여 cta view를 업데이트
    final String callToAction = nativeAd.getAd().getCallToAction();clickableViews.add(customizedCtaView);
    
    ...생략...

    nativeAdView.addOnNativeAdEventListener(new NativeAdView.OnNativeAdEventListener() {
    final int reward = nativeAd...getAd(생략)..getReward(); // 주의사항 참조.

      final boolean participated@Override
= nativeAd.isParticipated();       public void  updateCtaStatusonClicked(customizedCtaView, nativeAd);
  
    ...(생략)...@NonNull NativeAdView view, @NonNull NativeAd nativeAd) {
        final List<View> clickableViews = new ArrayList<>();
    clickableViews.add(customizedCtaView)updateCtaStatus(ctaView, nativeAd);;
    ...(생략)...    }
 nativeAdView.addOnNativeAdEventListener(new NativeAdView.OnNativeAdEventListener() {     
   ...(생략)...

        @Override
        public void onParticipated(@NonNull NativeAdView view, @NonNull NativeAd nativeAd) {
             updateCtaStatus(customizedCtaViewctaView, nativeAd);
        }
    });
}

// 기획에 따라 수정될 수 있는 예시 코드입니다. 
void updateCtaStatus(CustomCtaViewYourCtaView ctaView, NativeAd nativeAd) {
    final String callToAction = nativeAd.getAd().getCallToAction();
    final int reward = nativeAd.getAvailableReward();
    final int totalReward = nativeAd.getAd().getReward();
    final boolean participated = nativeAd.isParticipated();
    final boolean isClicked = nativeAd.isClicked();
    final boolean isActionType = nativeAd.getAd().isActionType();


    if (isClicked && isActionType && !participated) {
        ctaView.setCtaText("참여 확인 중");
        ctaView.setRewardIcon(null);
        ctaView.setRewardText(null);
    } else {
        if (totalReward > 0 && participated) {
            ctaView.setRewardIcon(R.drawable.your_reward_received_icon);
            ctaView.setRewardText(null);
            ctaView.setCtaText("참여 완료");
        } else if (reward > 0) {
            ctaView.showRewardImage(R.drawable.your_reward_icon);
            ctaView.setRewardText(String.format(Locale.US, "+%,d", reward));
            ctaView.setCtaText(callToAction);
        } else {
            ctaView.showRewardImage(null);
            ctaView.setRewardText(null);
            ctaView.setCtaText(callToAction);
        }
    }
}