SkullUtils.java

package fr.mrmicky.testplugin;

import com.mojang.authlib.GameProfile;
import com.mojang.authlib.properties.Property;
import org.bukkit.entity.Player;
import org.bukkit.inventory.meta.SkullMeta;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.UUID;

/**
 * Small class to apply custom textures to SkullMeta
 *
 * @author MrMicky - https://mrmicky.fr
 */
public final class SkullUtils {

    public static void applyTextures(SkullMeta meta, UUID uuid, String value) {
        applyTextures(meta, uuid, value, null);
    }

    public static void applyTextures(SkullMeta meta, UUID uuid, String value, String signature) {
        GameProfile gameProfile = new GameProfile(uuid, null);
        gameProfile.getProperties().put("textures", new Property("textures", value, signature));
        applyProfile(meta, gameProfile);
    }

    public static void applyProfile(SkullMeta meta, Player player) {
        try {
            GameProfile gameProfile = (GameProfile) player.getClass().getDeclaredMethod("getProfile").invoke(player);

            applyProfile(meta, gameProfile);
        } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
            e.printStackTrace();
        }
    }

    public static void applyProfile(SkullMeta meta, GameProfile gameProfile) {
        try {
            Field profileField = meta.getClass().getDeclaredField("profile");

            profileField.setAccessible(true);
            profileField.set(meta, gameProfile);
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}