version:1.0.4

fix:
update:增加下载

app/src/main/java/com/xwad/os/manager/DeviceSNManager.java

@@ -0,0 +1,100 @@
+package com.xwad.os.manager;
+
+import android.text.TextUtils;
+
+import com.tencent.mmkv.MMKV;
+import com.xwad.os.config.CommonConfig;
+
+import java.util.Random;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+public class DeviceSNManager {
+    private static final String SN_KEY = "device_sn";
+    private static final String PREFIX = "CDSN";
+    private static final int RANDOM_DIGITS = 9;
+
+    private static MMKV mMMKV = MMKV.mmkvWithID(CommonConfig.MMKV_ID, MMKV.MULTI_PROCESS_MODE);
+
+    public DeviceSNManager() {
+
+    }
+
+    /**
+     * 获取设备SN，如果不存在则创建新的
+     */
+    public static String getDeviceSN() {
+        String existingSN = mMMKV.decodeString(SN_KEY, "");
+
+        if (!TextUtils.isEmpty(existingSN)) {
+            return existingSN;
+        }
+        String newSN = generateNewSN();
+        mMMKV.encode(SN_KEY, newSN);
+        return newSN;
+    }
+
+    /**
+     * 生成新的设备SN
+     * 格式：CDSN202511T923852225
+     */
+    private static String generateNewSN() {
+        StringBuilder snBuilder = new StringBuilder();
+        // 添加前缀
+        snBuilder.append(PREFIX);
+        // 添加年份月份
+        String timeYear = formatTimestamp(System.currentTimeMillis());
+        snBuilder.append(timeYear);
+
+        // 添加基于时间戳的9位随机数字
+        snBuilder.append(generateRandomString(10));
+
+        return snBuilder.toString();
+    }
+
+    // 定义可供随机选择的字符池
+    private static final String LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    private static final String LETTERS_AND_DIGITS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+
+    public static String generateRandomString(int length) {
+        if (length < 1) {
+            throw new IllegalArgumentException("Length must be at least 1");
+        }
+
+        Random random = new Random();
+        StringBuilder sb = new StringBuilder(length);
+
+        // 第一位：确保是字母
+        sb.append(LETTERS.charAt(random.nextInt(LETTERS.length())));
+
+        // 剩余位数：字母或数字
+        for (int i = 1; i < length; i++) {
+            sb.append(LETTERS_AND_DIGITS.charAt(random.nextInt(LETTERS_AND_DIGITS.length())));
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * 删除已存储的SN（用于测试或重新生成）
+     */
+    public static void clearDeviceSN() {
+        mMMKV.removeValueForKey(SN_KEY);
+    }
+
+    /**
+     * 检查是否已存在SN
+     */
+    public static boolean hasDeviceSN() {
+        return mMMKV.containsKey(SN_KEY) && !TextUtils.isEmpty(mMMKV.decodeString(SN_KEY, ""));
+    }
+
+    public static String formatTimestamp(long timestamp) {
+        // 创建指定格式的格式化对象，"yyyyMM" 表示6位数字的年份和月份，"'T'" 表示字面量字符 T
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM'T'");
+        Date date = new Date(timestamp);
+        // 将 Date 对象格式化为字符串
+        return sdf.format(date);
+    }
+}