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