前段時間項目需要一個功能，就是在操作完某一個邏輯之后返回給客戶一個紅包，安全校驗團隊需要我們提供android設備的唯一標示，起初直接通過獲取設備的imei號傳給了server端，后臺公司云跡監(jiān)控發(fā)現(xiàn)，有些設備的imei號是0000000000000000，這樣失去了設備唯一性驗證的功能，第二個版本做了一個修復，除了獲取imei號之外還新增了AndrdoiId的處理，不過悲劇的是android 設備實在是太多太雜了，僅僅通過這兩個維度去確定設備的唯一性還是有一些漏洞的，最終我們的解決方案是盡量多的獲取與設備相關(guān)的信息，最后做一個MD5數(shù)字加簽，基本滿足了這個需求

[java]?view plaincopy

package?com.suning.mobile.epa;??

??

import?java.security.MessageDigest;??

import?java.security.NoSuchAlgorithmException;??

??

import?android.content.Context;??

import?android.os.Build;??

import?android.provider.Settings.Secure;??

import?android.telephony.TelephonyManager;??

??

public?class?DeviceFactoty?{??

???

??

????//?buildId??

????public?String?m_szDevIDShortMaker()?{??

????????String?m_szDevIDShort?=?"35";??

??

????????m_szDevIDShort?+=?Build.BOARD.length()?%?10?+?Build.BRAND.length()?%?10??

????????????????+?Build.CPU_ABI.length()?%?10?+?Build.DEVICE.length()?%?10??

????????????????+?Build.DISPLAY.length()?%?10?+?Build.HOST.length()?%?10??

????????????????+?Build.ID.length()?%?10?+?Build.MANUFACTURER.length()?%?10??

????????????????+?Build.MODEL.length()?%?10?+?Build.PRODUCT.length()?%?10??

????????????????+?Build.TAGS.length()?%?10?+?Build.TYPE.length()?%?10??

????????????????+?Build.USER.length()?%?10?+?"";??

??

????????return?m_szDevIDShort;??

????}??

??

??

??

????public?String?currentDeviceMark(Context?context)?{??

????????final?TelephonyManager?tm?=?(TelephonyManager)?context??

????????????????.getSystemService(Context.TELEPHONY_SERVICE);??

??

????????final?String?tmDevice,?tmSerial,?androidId;??

????????tmDevice?=?""?+?tm.getDeviceId();??

????????tmSerial?=?""?+?tm.getSimSerialNumber();??

????????androidId?=?""??

????????????????+?android.provider.Settings.Secure.getString(EPApp.getApp()??

????????????????????????.getContentResolver(),?Secure.ANDROID_ID);??

????????String?serial?=?"";??

????????if?(Build.VERSION.SDK_INT?>?Build.VERSION_CODES.FROYO){??

????????????serial?=?Build.SERIAL;??

????????}??

????????String?m_szLongID?=?tmDevice?+?tmSerial?+?androidId?+?serial??

????????????????+?m_szDevIDShortMaker();??

????????MessageDigest?m?=?null;??

????????try?{??

????????????m?=?MessageDigest.getInstance("MD5");??

????????}?catch?(NoSuchAlgorithmException?e)?{??

????????????e.printStackTrace();??

????????}??

????????m.update(m_szLongID.getBytes(),?0,?m_szLongID.length());??

????????//?get?md5?bytes??

????????byte?p_md5Data[]?=?m.digest();??

????????//?create?a?hex?string??

????????String?m_szUniqueID?=?new?String();??

????????for?(int?i?=?0;?i?<?p_md5Data.length;?i++)?{??

????????????int?b?=?(0xFF?&?p_md5Data[i]);??

????????????//?if?it?is?a?single?digit,?make?sure?it?have?0?in?front?(proper?padding)??

????????????if?(b?<=?0xF)??

????????????????m_szUniqueID?+=?"0";??

????????????//?add?number?to?string??

????????????m_szUniqueID?+=?Integer.toHexString(b);??

????????}?//?hex?string?to?uppercase??

????????return?m_szUniqueID?=?m_szUniqueID.toUpperCase();??

??

????}??

} ?

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