final FeedConfig feedConfig = new FeedConfig.Builder(getApplicationContext(), UNIT_ID_POP)
        ...
        .feedHeaderViewAdapterClass(CustomPedometerPopHeaderViewAdapter.class)
        ...
        .build();

public class CustomPedometerPopHeaderViewAdapter extends PedometerPopHeaderViewAdapter {
    @Override
    public PedometerPopHeaderConfig buildPopHeaderConfig(Context context) {
        return new PedometerPopHeaderConfig.Builder(context)
                .stepCountDescription()
                .progressChartColor()
                .progressChartGuideColor()
                .inProgressDescription()
                .rewardableDescription()
                .progressIconResId()
                .descriptionIconResId()
                .boundaryImageResId()
                .build();
    }
}

PedometerConfig
        .Builder(getApplicationContext(), UNIT_ID_PEDOMETER, UNIT_ID_PEDOMETER_REWARD)
        ...
        .pedometerMessageViewClass(DefaultPopPedometerMessageView.class) // 생략 가능
        .pedometerMessageViewVisibleThreshold(80f)
        .build();

public class CustomPopPedometerMessageView extends PopPedometerMessageView {
    private TextView textTitle;
    private TextView textDescription;
    private Context context;

    public CustomPopPedometerMessageView(@NotNull Context context) {
        super(context);
        this.context = context;
        LayoutInflater.from(context).inflate(R.layout.bz_view_pedometer_preview_message, this);
        textTitle = findViewById(R.id.textTitle);
        textDescription = findViewById(R.id.textDescription);
    }

    @Override
    public void updateView(long currentStep, @Nullable Milestone targetMilestone, @Nullable Milestone rewardableMilestone, int remainSeconds) {
        if (rewardableMilestone != null) {
            int reward = rewardableMilestone.getPoint();
            textTitle.setText("rewardable " + reward);
        } else if (targetMilestone != null && currentStep < targetMilestone.getStep()) {
            textTitle.setText(currentStep + " / " + targetMilestone.getStep());
        }
        textDescription.setText(context.getString(R.string.bz_pop_message_view_description, remainSeconds));
    }

    @NonNull
    @Override
    public String getMessage() {
        return textTitle.getText().toString();
    }

    @Override
    public int getDurationInSeconds() {
        return 20;
    }
}

return new PedometerConfig
        .Builder(getApplicationContext(), UNIT_ID_PEDOMETER, UNIT_ID_PEDOMETER_REWARD)
        .pedometerMessageViewClass(CustomPopPedometerMessageView.class)
        .pedometerMessageViewVisibleThreshold(80f)
        .build();

public class MyPedometerPopHeaderViewAdapter extends PedometerPopHeaderViewAdapter {

    private ViewGroup layoutSteps;
    private TextView pedometerStepCountDescription;
    private TextView textStepCount;
    private TextView pedometerInProgressDescription;
    private TextView pedometerRewardableDescription;
    private BuzzCircleProgressView buzzCircleProgressView;
    private ImageView buzzCircleProgressViewIcon;
    private ImageView pedometerInProgressDescriptionIcon;
    private ImageView pedometerDashboardBoundary;
    private ViewGroup pedometerDescription;
    private ViewGroup pedometerInProgress;
    private ViewGroup pedometerRewardable;
    private ViewGroup layoutPedometerProgress;
    private Context context;

    @NotNull
    @Override
    public View onCreateView(@NotNull Context context, @NotNull ViewGroup parent) {
        return super.onCreateView(context, parent);
    }

    @NotNull
    @Override
    public View createView(@NotNull Context context, @NotNull ViewGroup parent) {
        this.context = context;
        View view =  LayoutInflater.from(context).inflate(
                R.layout.view_custom_pedometer_pop_header,
                parent,
                false
        );
        setPedometer(context, parent, view);
        return view;
    }

    private void setPedometer(
            Context context,
            ViewGroup parent,
            View view
    ) {
        layoutSteps = view.findViewById(R.id.layoutSteps);
        layoutSteps.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                navigateToPedometerHistory();
            }
        });
        pedometerStepCountDescription =
                view.findViewById(R.id.pedometerStepCountDescription);
        textStepCount = view.findViewById(R.id.textStepCount);
        textStepCount.setText(BuzzAdPopPedometer.getStepCount() + "");
        buzzCircleProgressView = view.findViewById(R.id.buzzCircleProgressView);
        buzzCircleProgressView.setProgressSettings(0, getMaxProgress());
        buzzCircleProgressView.setProgress(getProgress());
        buzzCircleProgressViewIcon = view.findViewById(R.id.buzzCircleProgressViewIcon);
        pedometerInProgressDescriptionIcon =
                view.findViewById(R.id.pedometerInProgressDescriptionIcon);
        pedometerDescription = view.findViewById(R.id.pedometerDescription);
        pedometerDescription.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                navigateToPedometer();
            }
        });
        pedometerInProgress = view.findViewById(R.id.pedometerInProgress);
        pedometerRewardable = view.findViewById(R.id.pedometerRewardable);
        pedometerInProgressDescription =
                view.findViewById(R.id.pedometerInProgressDescription);
        pedometerRewardableDescription =
                view.findViewById(R.id.pedometerRewardableDescription);
        pedometerDashboardBoundary = view.findViewById(R.id.pedometerDashboardBoundary);
        layoutPedometerProgress = view.findViewById(R.id.layoutPedometerProgress);
        updatePedometerStat();
    }

    void updatePedometerStat() {
        if (isRewardable()) {
            pedometerInProgress.setVisibility(View.GONE);
            pedometerRewardable.setVisibility(View.VISIBLE);
        } else {
            pedometerInProgress.setVisibility(View.VISIBLE);
            pedometerRewardable.setVisibility(View.GONE);
        }
        buzzCircleProgressView.setProgress(getProgress());
        textStepCount.setText(getStep() + "");
        initPedometerProgressView(getMilestones(), getStep());
    }

    private void initPedometerProgressView(
            List<Milestone> milestones,
            Long step
    ) {
        Context ctx = context;
        if (milestones != null && ctx != null) {
            layoutPedometerProgress.removeAllViews();
            for (Milestone milestone : milestones) {
                PedometerProgressView pedometerProgressView = new PedometerProgressView(ctx);
                pedometerProgressView.setMilestone(milestone);
                layoutPedometerProgress.addView(pedometerProgressView);
                LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) pedometerProgressView.getLayoutParams();
                layoutParams.width = dpToPx(ctx, 80f);
                layoutParams.topMargin = dpToPx(ctx, 12f);
                pedometerProgressView.setCount(step.intValue());
                pedometerProgressView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(ctx, "milestone clicked", Toast.LENGTH_SHORT).show();
                    }
                });
            }
        }
    }

    private int dpToPx(Context context, float dpValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    @Override
    public void onBindView(@NotNull View view, int reward) {
        super.onBindView(view, reward);
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
    }

    @Nullable
    @Override
    public PopPedometerHeaderEventListener getPopPedometerHeaderEventListener() {
        return new PopPedometerHeaderEventListener() {
            @Override
            public void onStepChanged(long step) {
                updatePedometerStat();
            }

            @Override
            public void onMilestoneReached(@NotNull List<Milestone> milestones) {
                updatePedometerStat();
            }

            @Override
            public void onMilestoneUpdated(@NotNull List<Milestone> milestones) {
                updatePedometerStat();
            }
        };
    }
}

abstract fun getPopPedometerHeaderEventListener(): PopPedometerHeaderEventListener?

interface PopPedometerHeaderEventListener {
    fun onStepChanged(step: Long)
    fun onMilestoneReached(milestones: List<Milestone>)
    fun onMilestoneUpdated(milestones: List<Milestone>)
}

final FeedConfig feedConfig = new FeedConfig.Builder(getApplicationContext(), UNIT_ID_POP)
        ...
        .feedHeaderViewAdapterClass(MyPedometerPopHeaderViewAdapter.class)
        .build();
popConfig = new PopConfig.Builder(getApplicationContext(), UNIT_ID_POP)
        ...
        .feedConfig(feedConfig)
        .build();
final BuzzAdBenefitConfig buzzAdBenefitConfig = new BuzzAdBenefitConfig.Builder(this)
        .add(popConfig)
        .build();
BuzzAdBenefit.init(this, buzzAdBenefitConfig);