private static final int MIN_DELAY_TIME = 2000;  // 兩次點選間隔不能少於2000ms
private static long lastClickTime = System.currentTimeMillis();

public static boolean isFastClick() {
    boolean flag = true;
    long currentClickTime = System.currentTimeMillis();
    if ((currentClickTime - lastClickTime) <= MIN_DELAY_TIME) {
        flag = false;
    }
    lastClickTime = currentClickTime;
    return flag;
}