Solved Health indicator

Hello. I'm wondering how you can have a "health indicator" using an action bar similar to Hypixel The Bridge.
Example:

 

Anything other servers do you can code unless it's modded, this can be done. I would have a repeating task constantly sending a message to each player's action bar with their health, you need to build a string and use
♥ to indicate the hearts with chat color so it would probably look something like this

Code:

public static String stringBuilder(Player p) {
    String str = ChatColor.BLUE+p.getName()+" ";
    int health = (int) Math.ceil(p.getHealth()/2);
    for (int i=0; i < health; i++)
        str += ChatColor.RED+"♥";
    for (int i=(10-health); i > 0; i--)
        str += ChatColor.YELLOW+"♥";
    return str;
}

 

Java recommends using a StringBuilder instance (or StringBuffer if you want thread-safe?) instead of continuously concatenating strings within loops.

Code:Java

// I'd suggest using this over concatenating with ChatColor enums. But you do you, shouldn't matter much.
// If you want to use this, you could add this method in some sort of Utils classes for easier calling.
public static String color(final String s) {
    return ChatColor.translateAlternateColorCodes('&', s);
}
 
public static String buildHealthString(final Player p) {
    final StringBuilder sb = new StringBuilder("&9").append(p.getName()).append(" ");
    final int hearts = (int) Math.ceil(p.getHealth() / 2);
 
    for(int i = 0; i < hearts; i++) {
        sb.append("&c").append("♥"); // Represents remaining hearts, colored red.
    }
    for(int i = 10 - hearts; i > 0; i--) {
        sb.append("&4").append("♥"); // Represents missing hearts, colored dark red.
    }
 
    // Same for absorption hearts.
    return sb.toString();
}

But if you really want to use action bars, you need a PacketPlayOutChat. It's not present in Bukkit api, so you need to add a Craftbukkit jar as a dependency. I don't know if there's an official method to do so, all I could find is a sending titles and subtitles.

Code:Java

// You can get the json data (IChatBaseComponent) from ChatSerializer.a(String) method.
// The byte is the position, 0 for chatbox, 1 for system message, 2 for action bar.
PacketPlayOutChat(JSON data, byte); // 1.8
PacketPlayOutChat(JSON data, ChatMessageType, UUID); // Later versions.
 
//Here's an example:
final PacketPlayOutChat packet = PacketPlayOutChat(ChatSerializer.a("{\"text\":\"" + color("&chello!") + "\"}"), (byte) 2);
// One way to send packet. Other is by writing into their channels but that's protocollib's thing and idk much.
((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);

 

Thanks; sorry for the late reply I've been quite busy. I'll try and look at it soon. Going on vacation so I won't be on my PC for a while lol. Will update once I've added.

 

Sorry for the super late reply, but it works haha. Marking as solved.