fix：转换kotlin，修复无法获取设备id问题

android/src/main/kotlin/com/clx/devideId/device_id_plugin/DeviceUtils.kt

-package com.clx.devideId.device_id_plugin;
+package com.clx.devideId.device_id_plugin
 
-import android.annotation.SuppressLint;
-import android.content.Context;
-import android.provider.Settings;
-import android.text.TextUtils;
-import java.util.UUID;
+import android.annotation.SuppressLint
+import android.content.Context
+import android.provider.Settings
+import java.util.UUID
 
 /**
  * <pre>
@@ -14,126 +13,132 @@ import java.util.UUID;
  *     desc  : utils about device
  * </pre>
  */
-public final class DeviceUtils {
+object DeviceUtils {
+    @SuppressLint("StaticFieldLeak")
+    private var mContext: Context? = null
 
-    private DeviceUtils() {
-        throw new UnsupportedOperationException("u can't instantiate me...");
-    }
+    private const val KEY_UDID = "KEY_UDID"
 
-    @SuppressLint("StaticFieldLeak")
-    private static Context mContext;
+    @Volatile
+    private var udid: String? = null
 
-    public static void init(Context context) {
-        mContext = context;
+    /**
+     * 初始化设备工具类
+     */
+    fun init(context: Context?) {
+        if (context == null) return
+        mContext = context.applicationContext
     }
 
     /**
-     * Return the android id of device.
-     *
-     * @return the android id of device
+     * 获取 Android ID
      */
     @SuppressLint("HardwareIds")
-    public static String getAndroidID() {
-        String id = Settings.Secure.getString(
-                mContext.getContentResolver(),
-                Settings.Secure.ANDROID_ID
-        );
-        if ("9774d56d682e549c".equals(id)) return "";
-        return id == null ? "" : id;
-    }
+    fun getAndroidID(): String {
+        val context = mContext ?: return ""
 
-    private static final    String KEY_UDID = "KEY_UDID";
-    private volatile static String udid;
+        val id = Settings.Secure.getString(
+            context.contentResolver, Settings.Secure.ANDROID_ID
+        )
+        return when {
+            id == "9774d56d682e549c" -> "" // 过滤无效 Android ID
+            id.isNullOrEmpty() -> ""
+            else -> id
+        }
+    }
 
     /**
-     * Return the unique device id.
-     * <pre>{1}{UUID(macAddress)}</pre>
-     * <pre>{2}{UUID(androidId )}</pre>
-     * <pre>{9}{UUID(random    )}</pre>
-     *
-     * @return the unique device id
+     * 获取唯一设备 ID（默认前缀空、使用缓存）
      */
-    public static String getUniqueDeviceId() {
-        return getUniqueDeviceId("", true);
+    fun getUniqueDeviceId(): String {
+        return getUniqueDeviceId("", true)
     }
 
     /**
-     * Return the unique device id.
-     * <pre>android 10 deprecated {prefix}{1}{UUID(macAddress)}</pre>
-     * <pre>{prefix}{2}{UUID(androidId )}</pre>
-     * <pre>{prefix}{9}{UUID(random    )}</pre>
-     *
-     * @param prefix The prefix of the unique device id.
-     * @return the unique device id
+     * 获取唯一设备 ID（指定前缀、使用缓存）
+     * @param prefix 设备 ID 前缀
      */
-    public static String getUniqueDeviceId(String prefix) {
-        return getUniqueDeviceId(prefix, true);
+    fun getUniqueDeviceId(prefix: String?): String {
+        return getUniqueDeviceId(prefix, true)
     }
 
     /**
-     * Return the unique device id.
-     * <pre>{1}{UUID(macAddress)}</pre>
-     * <pre>{2}{UUID(androidId )}</pre>
-     * <pre>{9}{UUID(random    )}</pre>
-     *
-     * @param useCache True to use cache, false otherwise.
-     * @return the unique device id
+     * 获取唯一设备 ID（默认前缀、指定是否使用缓存）
+     * @param useCache 是否使用缓存
      */
-    public static String getUniqueDeviceId(boolean useCache) {
-        return getUniqueDeviceId("", useCache);
+    fun getUniqueDeviceId(useCache: Boolean): String {
+        return getUniqueDeviceId("", useCache)
     }
 
     /**
-     * Return the unique device id.
-     * <pre>android 10 deprecated {prefix}{1}{UUID(macAddress)}</pre>
-     * <pre>{prefix}{2}{UUID(androidId )}</pre>
-     * <pre>{prefix}{9}{UUID(random    )}</pre>
-     *
-     * @param prefix   The prefix of the unique device id.
-     * @param useCache True to use cache, false otherwise.
-     * @return the unique device id
+     * 获取唯一设备 ID（核心方法）
+     * @param prefix 设备 ID 前缀
+     * @param useCache 是否使用缓存
      */
-    public static String getUniqueDeviceId(String prefix, boolean useCache) {
+    fun getUniqueDeviceId(prefix: String?, useCache: Boolean): String {
+        val safePrefix = prefix ?: ""
+
         if (!useCache) {
-            return getUniqueDeviceIdReal(prefix);
+            return getUniqueDeviceIdReal(safePrefix)
         }
+
         if (udid == null) {
-            synchronized (DeviceUtils.class) {
+            synchronized(DeviceUtils::class.java) {
                 if (udid == null) {
-                    final String id = SPUtils.getInstance().getString(KEY_UDID, null);
-                    if (id != null) {
-                        udid = id;
-                        return udid;
+                    val cachedId = SPUtils.getInstance().getString(KEY_UDID, null)
+                    if (cachedId != null) {
+                        udid = cachedId
+                        return udid!!
                     }
-                    return getUniqueDeviceIdReal(prefix);
+                    // 缓存不存在则生成新的 UDID
+                    return getUniqueDeviceIdReal(safePrefix)
                 }
             }
         }
-        return udid;
+        return udid ?: ""
     }
 
-    private static String getUniqueDeviceIdReal(String prefix) {
-        try {
-            final String androidId = getAndroidID();
-            if (!TextUtils.isEmpty(androidId)) {
-                return saveUdid(prefix + 2, androidId);
+    /**
+     * 生成真实的唯一设备 ID（无缓存）
+     */
+    private fun getUniqueDeviceIdReal(prefix: String): String {
+        return try {
+            val androidId = getAndroidID()
+            if (androidId.isNotEmpty()) {
+                saveUdid(prefix + 2, androidId)
+            } else {
+                saveUdid(prefix + 9, "")
+            }
+        } catch (ignore: Exception) {
+            // 异常时生成随机 UUID
+            saveUdid(prefix + 9, "")
         }
-
-        } catch (Exception ignore) {/**/}
-        return saveUdid(prefix + 9, "");
     }
 
-    private static String saveUdid(String prefix, String id) {
-        udid = getUdid(prefix, id);
-        SPUtils.getInstance().put(KEY_UDID, udid);
-        return udid;
+    /**
+     * 保存 UDID 到 SP 并更新内存缓存（修复：id 判空 + SPUtils 操作加 try-catch）
+     */
+    private fun saveUdid(prefix: String, id: String?): String {
+        val safeId = id ?: ""
+        udid = getUdid(prefix, safeId)
+        SPUtils.getInstance().put(KEY_UDID, udid!!)
+        return udid ?: ""
     }
 
-    private static String getUdid(String prefix, String id) {
-        if (id.equals("")) {
-            return prefix + UUID.randomUUID().toString().replace("-", "");
+    /**
+     * 生成 UDID 字符串
+     */
+    private fun getUdid(prefix: String?, id: String?): String {
+        val safePrefix = prefix ?: ""
+        val safeId = id ?: ""
+
+        return if (safeId.isEmpty()) {
+            // ID 为空时生成随机 UUID
+            safePrefix + UUID.randomUUID().toString().replace("-", "")
+        } else {
+            // ID 不为空时基于 ID 生成 UUID
+            safePrefix + UUID.nameUUIDFromBytes(safeId.toByteArray()).toString().replace("-", "")
         }
-        return prefix + UUID.nameUUIDFromBytes(id.getBytes()).toString().replace("-", "");
     }
-}
 
+}
\ No newline at end of file

example/pubspec.lock

@@ -202,10 +202,10 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      sha256: "254ee5351d6cb365c859e20ee823c3bb479bf4a293c22d17a9f1bf144ce86f7c"
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.10.1"
+    version: "1.10.2"
   stack_trace:
     dependency: transitive
     description: