Detect click+long click+double click+holding on Android

KeyDetector.java

import android.os.Handler;

import org.jetbrains.annotations.NotNull;

public class KeyDetector {
    private final Handler handler = new Handler();

    private final Settings settings;
    private final KeyDetectedEvent listener;

    public KeyDetector(@NotNull Settings settings, @NotNull KeyDetectedEvent listener) {
        this.settings = settings;
        this.listener = listener;
    }

    public static class Settings {
        boolean handleClick = true;
        boolean handleLongClick = false;
        boolean handleDoubleClick = false;
        boolean handleHolding = true;

        int longClickDelayMs = 600;
        int doubleClickDelayMs = 400;
        int holdingDelayMs = 500;
        int holdingInterval = 200;
    }

    public interface KeyDetectedEvent {
        void onClick();
        void onLongClick();
        void onDoubleClick();
        void onHolding();
    }

    private int clickCount = 0;
    private boolean keyNowPressed = false;
    private boolean nowIsHolding = false;

    private void clearCurrentTap() {
        clickCount = 0;
        keyNowPressed = false;
        nowIsHolding = false;
        handler.removeCallbacksAndMessages(null);
    }

    private void notifyClickIfDoubleClickEnabled() {
        if (clickCount == 0 || keyNowPressed) return;
        clearCurrentTap();
        listener.onClick();
    }

    private void handleLongClick() {
        if (clickCount == 0) return;
        clearCurrentTap();
        listener.onLongClick();
    }

    private void handleHolding() {
        if (!keyNowPressed) {
            clearCurrentTap();
            return;
        }
        nowIsHolding = true;
        listener.onHolding();
        handler.postDelayed(this::handleHolding, settings.holdingInterval);
    }

    public void inEventPressed() {
        if (keyNowPressed) return;
        keyNowPressed = true;

        if (settings.handleClick && !settings.handleDoubleClick && !settings.handleLongClick && !settings.handleHolding) {
            clearCurrentTap();
            listener.onClick();
            return;
        }

        if (settings.handleLongClick && clickCount == 0) {
            handler.postDelayed(this::handleLongClick, settings.longClickDelayMs);
        }

        if (settings.handleHolding && clickCount == 0) {
            if (settings.handleClick && !settings.handleDoubleClick && !settings.handleLongClick) {
                listener.onClick();
            }
            handler.postDelayed(this::handleHolding, settings.holdingDelayMs);
        }

        if (settings.handleDoubleClick) {
            if (clickCount == 0) {
                handler.postDelayed(this::notifyClickIfDoubleClickEnabled, settings.doubleClickDelayMs);
            }

            if (clickCount == 1) {
                clearCurrentTap();
                listener.onDoubleClick();
                return;
            }
        }

        clickCount += 1;
    }

    public void inEventReleased() {
        if (!keyNowPressed) return;
        keyNowPressed = false;

        if (settings.handleClick && clickCount == 1 && !settings.handleDoubleClick && !settings.handleHolding) {
            clearCurrentTap();
            listener.onClick();
        }

        if (settings.handleHolding) {
            clearCurrentTap();
        }
    }
}