Solved Inventory Movement

In my custom inventory when i click on a player head i can pick it up but not put it down which is what im trying to do
this is my code

Code:

public void onClick(InventoryClickEvent e) {
        String title = e.getInventory().getTitle();
        Player p = (Player) e.getWhoClicked();
        if (title.equalsIgnoreCase(Utils.color(plugin.getConfig().getString("GUI.name")))) {
            if(e.getCurrentItem().getType() == Material.SKULL_ITEM) {
                e.setCancelled(false);
            } else if(e.getCurrentItem() == null || e.getCurrentItem().getType()== Material.AIR){
                e.setCancelled(false);
                p.sendMessage("yes");
            }
            if (e.getCurrentItem().getItemMeta().getDisplayName().equalsIgnoreCase(Utils.color(plugin.getConfig().getString("GUI.Accept/Deny.Accept.Name")))) {
                e.setCancelled(true);
                p.sendMessage("Nope");
                total = 0;
                for(int i = 0 ; i < plugin.getConfig().getInt("GUI.slots") ; i++) {
                    if (i == (Main.plugin.getConfig().getInt("GUI.Accept/Deny.Accept.Slot") - 1) || i == (Main.plugin.getConfig().getInt("GUI.Accept/Deny.Deny.Slot") - 1)) {
                       
                    } else {
                        if (e.getInventory().getItem(i) == null) {
                        }else {
                            ItemMeta m = e.getInventory().getItem(i).getItemMeta();
                            List<String> lore = m.getLore();
                            String line = lore.get(0);
                            line = line.replaceAll("\n", "").replaceAll("\r", "");
                            line = ChatColor.stripColor(line);
                            line = line.replaceAll("[^\\d.]", "");
                            double cost = Double.valueOf(line.replaceAll("[^\\d.]", ""));
                            cost = cost * e.getInventory().getItem(i).getAmount();
                            total = total + cost;
                            Utils.createItemByte(e.getInventory(), "STAINED_GLASS_PANE", 7, 1, i + 1, "", "");
                            p.updateInventory();
                            Main.economy.depositPlayer(p.getName(), cost);
                        }
                    }
                }
                double seconds = .5;

                Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
                    public void run() {
                        p.playSound(p.getLocation(), Sound.LEVEL_UP, 10, 1);
                        p.closeInventory();
                        p.sendMessage(Utils.color(plugin.getConfig().getString("Messages.trade_accepted").replace("%total%", String.valueOf(total))));
                    }
                }, (long) (seconds * 20));
            }else if (e.getCurrentItem().getItemMeta().getDisplayName().equalsIgnoreCase(Utils.color(plugin.getConfig().getString("GUI.Accept/Deny.Deny.Name")))) {
                e.setCancelled(true);
                p.sendMessage("Nope");
                for(int i = 0 ; i < plugin.getConfig().getInt("GUI.slots") ; i++) {
                    if (i == (Main.plugin.getConfig().getInt("GUI.Accept/Deny.Accept.Slot") - 1) || i == (Main.plugin.getConfig().getInt("GUI.Accept/Deny.Deny.Slot") - 1)) {
                       
                    } else {
                        if (e.getInventory().getItem(i) == null) {
                        }else {
                            p.getInventory().addItem(e.getInventory().getItem(i));
                        }
                    }
                }
                p.closeInventory();
                p.sendMessage(Utils.color(plugin.getConfig().getString("Messages.trade_cancelled")));
            }
        }
    }

Fixed it Dont worry
Changed this
} else if(e.getCurrentItem() == null || e.getCurrentItem().getType()== Material.AIR){
e.setCancelled(false);
p.sendMessage("yes");
}

To:
} else if(e.getCursor().getType() != Material.SKULL_ITEM){
e.setCancelled(true);
}
And works great

EDIT by Moderator: merged posts, please use the edit button instead of double posting.