获取Android设备唯一标识码的几种方式详解

来源：互联网发布：java long 长度编辑：程序博客网时间：2024/05/22 17:23

获取Android设备唯一标识码

1.概述

有时需要对用户设备进行标识，所以希望能够得到一个稳定可靠并且唯一的识别码。虽然Android系统中提供了这样设备识别码，但是由于Android系统版本、厂商定制系统中的Bug等限制，稳定性和唯一性并不理想。而通过其他硬件信息标识也因为系统版本、手机硬件等限制存在不同程度的问题。

2.下面收集了一些“有能力”或“有一定能力”作为设备标识的串码。

-DEVICE_ID

这是Android系统为开发者提供的用于标识手机设备的串号，也是各种方法中普适性较高的，可以说几乎所有的设备都可以返回这个串号，并且唯一性良好。

这个DEVICE_ID可以同通过下面的方法获取：

<code class="hljs mathematica has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">TelephonyManager tm = (TelephonyManager)getSystemService(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">Context</span>.TELEPHONY_SERVICE); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">String</span> DEVICE_ID = tm.getDeviceId(); </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

它会根据不同的手机设备返回IMEI，MEID或者ESN码，但在使用的过程中有以下问题：
非手机设备：最开始搭载Android系统都手机设备，而现在也出现了非手机设备：如平板电脑、电子书、电视、音乐播放器等。这些设备没有通话的硬件功能，系统中也就没有TELEPHONY_SERVICE，自然也就无法通过上面的方法获得DEVICE_ID。
权限问题：获取DEVICE_ID需要READ_PHONE_STATE权限，如果只是为了获取DEVICE_ID而没有用到其他的通话功能，申请这个权限一来大才小用，二来部分用户会怀疑软件的安全性。
厂商定制系统中的Bug：少数手机设备上，由于该实现有漏洞，会返回垃圾，如:zeros或者asterisks

-MAC ADDRESS

可以使用手机Wifi或蓝牙的MAC地址作为设备标识，但是并不推荐这么做，原因有以下两点：
硬件限制：并不是所有的设备都有Wifi和蓝牙硬件，硬件不存在自然也就得不到这一信息。
获取的限制：如果Wifi没有打开过，是无法获取其Mac地址的；而蓝牙是只有在打开的时候才能获取到其Mac地址。

获取Wifi Mac地址：常用方法，调用Android的API：WifiManager

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><uses-permission android:name=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"android.permission.ACCESS_WIFI_STATE"</span>></uses-permission>WifiManager wifi = (WifiManager) getSystemService(Context<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.WIFI</span>_SERVICE)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>WifiInfo info = wifi<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getConnectionInfo</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>return info<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getMacAddress</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li></ul>

此方法需要保证WIFI在本次开机以来曾经是打开过的，否则会返回null。所以需要后台尝试先打开WIFI再获取。

获取蓝牙 Mac地址：

-Sim Serial Number

装有SIM卡的设备，可以通过下面的方法获取到Sim Serial Number：

<code class="hljs mathematica has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">TelephonyManager tm = (TelephonyManager)getSystemService(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">Context</span>.TELEPHONY_SERVICE); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">String</span> SimSerialNumber = tm.getSimSerialNumber(); </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

注意：对于CDMA设备，返回的是一个空值！

-ANDROID_ID

在设备首次启动时，系统会随机生成一个64位的数字，并把这个数字以16进制字符串的形式保存下来，这个16进制的字符串就是ANDROID_ID，当设备被wipe后该值会被重置。可以通过下面的方法获取：

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">import android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.provider</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.Settings</span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>String ANDROID_ID = Settings<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.System</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getString</span>(getContentResolver(), Settings<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.System</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.ANDROID</span>_ID)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">; </span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

ANDROID_ID可以作为设备标识，但需要注意：

厂商定制系统的Bug：不同的设备可能会产生相同的ANDROID_ID。
厂商定制系统的Bug：有些设备返回的值为null。
设备差异：对于CDMA设备，ANDROID_ID和TelephonyManager.getDeviceId() 返回相同的值。

-Serial Number

Android系统2.3版本以上可以通过下面的方法得到Serial Number，且非手机设备也可以通过该接口获取。

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">String SerialNumber = android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.os</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.Build</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.SERIAL</span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">; </span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

-Installtion ID

以上几种方式都或多或少存在一定的局限性或者Bug，如果并不是确实需要对硬件本身进行绑定，使用自己生成的UUID也是一个不错的选择，因为该方法无需访问设备的资源，也跟设备类型无关。

这种方式的原理是在程序安装后第一次运行时生成一个ID，该方式和设备唯一标识不一样，不同的应用程序会产生不同的ID，同一个程序重新安装也会不同。所以这不是设备的唯一ID，但是可以保证每个用户的ID是不同的。可以说是用来标识每一份应用程序的唯一ID（即Installtion ID），可以用来跟踪应用的安装数量等。

Google Developer Blog提供了这样的一个框架：

<code class="hljs cs has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> Installation { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String sID = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> final String INSTALLATION = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"INSTALLATION"</span>;   <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> synchronized <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">id</span>(Context context) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (sID == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) { File installation = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(context.getFilesDir(), INSTALLATION); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!installation.exists()) writeInstallationFile(installation); sID = readInstallationFile(installation); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (Exception e) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throw</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> RuntimeException(e); } } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> sID; }   <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">readInstallationFile</span>(File installation) throws IOException { RandomAccessFile f = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> RandomAccessFile(installation, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"r"</span>); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">byte</span>[] bytes = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">byte</span>[(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>) f.length()]; f.readFully(bytes); f.close(); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> String(bytes); }   <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">writeInstallationFile</span>(File installation) throws IOException { FileOutputStream <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span> = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> FileOutputStream(installation); String id = UUID.randomUUID().toString(); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.write(id.getBytes()); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.close(); } } </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

设备唯一ID

上文可以看出，Android系统中并没有可以可靠获取所有厂商设备唯一ID的方法，各个方法都有自己的使用范围和局限性，这也是目前流行的Android系统版本过多，设备也是来自不同厂商，且没有统一标准等原因造成的。

从目前发展来看，Android系统多版本共存还会持续较长的时间，而Android系统也不会被某个设备生产厂商垄断，长远看Android基础系统将会趋于稳定，设备标识也将会作为系统基础部分而标准化，届时这一问题才有望彻底解决。

目前的解决办法，比较可行的是一一适配，在保证大多数设备方便的前提下，如果获取不到，使用其他备选信息作为标识，即自己再封装一个设备ID出来，通过内部算法保证尽量和设备硬件信息相关，以及标识的唯一性。

android 底层是 Linux，我们还是用Linux的方法来获取：

1 cpu号：

文件在： /proc/cpuinfo

通过Adb shell 查看：

adb shell cat /proc/cpuinfo

2 mac 地址

文件路径 /sys/class/net/wlan0/address

adb shell cat /sys/class/net/wlan0/address
xx:xx:xx:xx:xx:aa

这样可以获取两者的序列号，

方法确定，剩下的就是写代码了

以Mac地址为例：

<code class="hljs axapta has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">        String getMac() {                String macSerial = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>;                String <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span> = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">""</span>;                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {                        Process pp = Runtime.getRuntime().exec(                                        <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"cat /sys/class/net/wlan0/address "</span>);                        InputStreamReader ir = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> InputStreamReader(pp.getInputStream());                        LineNumberReader input = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> LineNumberReader(ir);                        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> (; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span>;) {                                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span> = input.readLine();                                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span> != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {                                        macSerial = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">str</span>.trim();<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 去空格</span>                                        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">break</span>;                                }                        }                } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (IOException ex) {                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 赋予默认值</span>                        ex.printStackTrace();                }                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> macSerial;        }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li></ul>

Android 手机上获取物理唯一标识码

唯一标识码这东西在网络应用中非常有用，例如检测是否重复注册之类的。

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">import android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.provider</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.Settings</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.Secure</span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span>private String android_id = Secure<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getString</span>(getContext()<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getContentResolver</span>(), Secure<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.ANDROID</span>_ID)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

我们在项目过程中或多或少会使用到设备的唯一识别码，我们希望能够得到一个稳定、可靠的设备唯一识别码。今天我们将介绍几种方式。
1. DEVICE_ID

假设我们确实需要用到真实设备的标识，可能就需要用到DEVICE_ID。在以前，我们的Android设备是手机，这个DEVICE_ID可以同通过TelephonyManager.getDeviceId()获取，它根据不同的手机设备返回IMEI，MEID或者ESN码，但它在使用的过程中会遇到很多问题：

非手机设备：如果只带有Wifi的设备或者音乐播放器没有通话的硬件功能的话就没有这个DEVICE_ID
权限：获取DEVICE_ID需要READ_PHONE_STATE权限，但如果我们只为了获取它，没有用到其他的通话功能，那这个权限有点大才小用
bug：在少数的一些手机设备上，该实现有漏洞，会返回垃圾，如:zeros或者asterisks的产品

2.MAC ADDRESS

我们也可以通过手机的Wifi或者蓝牙设备获取MAC ADDRESS作为DEVICE ID，但是并不建议这么做，因为并不是所有的设备都有Wifi，并且，如果Wifi没有打开，那硬件设备无法返回MAC ADDRESS.

3.Serial Number

在Android 2.3可以通过android.os.Build.SERIAL获取，非手机设备可以通过该接口获取。

4.ANDROID_ID

ANDROID_ID是设备第一次启动时产生和存储的64bit的一个数，当设备被wipe后该数重置

ANDROID_ID似乎是获取Device ID的一个好选择，但它也有缺陷：

它在Android <=2.1 or Android >=2.3的版本是可靠、稳定的，但在2.2的版本并不是100%可靠的
在主流厂商生产的设备上，有一个很经常的bug，就是每个设备都会产生相同的ANDROID_ID：9774d56d682e549c

5.Installtion ID : UUID

以上四种方式都有或多或少存在的一定的局限性或者bug，在这里，有另外一种方式解决，就是使用UUID，该方法无需访问设备的资源，也跟设备类型无关。

这种方式是通过在程序安装后第一次运行后生成一个ID实现的，但该方式跟设备唯一标识不一样，它会因为不同的应用程序而产生不同的ID，而不是设备唯一ID。因此经常用来标识在某个应用中的唯一ID（即Installtion ID），或者跟踪应用的安装数量。很幸运的，Google Developer Blog提供了这样的一个框架：

<code class="hljs cs has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> Installation {    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String sID = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> final String INSTALLATION = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"INSTALLATION"</span>;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> synchronized <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">id</span>(Context context) {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (sID == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {              File installation = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(context.getFilesDir(), INSTALLATION);            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!installation.exists())                    writeInstallationFile(installation);                sID = readInstallationFile(installation);            } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (Exception e) {                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throw</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> RuntimeException(e);            }        }        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> sID;    }    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> String <span class="hljs-title" style="box-sizing: border-box;">readInstallationFile</span>(File installation) throws IOException {        RandomAccessFile f = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> RandomAccessFile(installation, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"r"</span>);        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">byte</span>[] bytes = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">byte</span>[(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span>) f.length()];        f.readFully(bytes);        f.close();        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> String(bytes);    }    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">writeInstallationFile</span>(File installation) throws IOException {        FileOutputStream <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span> = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> FileOutputStream(installation);        String id = UUID.randomUUID().toString();        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.write(id.getBytes());        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">out</span>.close();    }}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li></ul>

总结

综合以上所述，为了实现在设备上更通用的获取设备唯一标识，我们可以实现这样的一个类，为每个设备产生唯一的UUID，以ANDROID_ID为基础，在获取失败时以TelephonyManager.getDeviceId()为备选方法，如果再失败，使用UUID的生成策略。

重申下，以下方法是生成Device ID，在大多数情况下Installtion ID能够满足我们的需求，但是如果确实需要用到Device ID，那可以通过以下方式实现：

<code class="hljs java has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.content.Context;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.content.SharedPreferences;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.provider.Settings.Secure;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.telephony.TelephonyManager;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.io.UnsupportedEncodingException;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> java.util.UUID;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">DeviceUuidFactory</span> {</span>    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String PREFS_FILE = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"device_id.xml"</span>;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String PREFS_DEVICE_ID = <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"device_id"</span>;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">static</span> UUID uuid;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-title" style="box-sizing: border-box;">DeviceUuidFactory</span>(Context context) {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>( uuid ==<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> ) {            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">synchronized</span> (DeviceUuidFactory.class) {                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>( uuid == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {                    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> SharedPreferences prefs = context.getSharedPreferences( PREFS_FILE, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>);                    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String id = prefs.getString(PREFS_DEVICE_ID, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> );                    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (id != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Use the ids previously computed and stored in the prefs file</span>                        uuid = UUID.fromString(id);                    } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {                        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Use the Android ID unless it's broken, in which case fallback on deviceId,</span>                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// unless it's not available, then fallback on a random number which we store</span>                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// to a prefs file</span>                        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> {                            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"9774d56d682e549c"</span>.equals(androidId)) {                                uuid = UUID.nameUUIDFromBytes(androidId.getBytes(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"utf8"</span>));                            } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {                                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</span> String deviceId = ((TelephonyManager) context.getSystemService( Context.TELEPHONY_SERVICE )).getDeviceId();                                uuid = deviceId!=<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> ? UUID.nameUUIDFromBytes(deviceId.getBytes(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"utf8"</span>)) : UUID.randomUUID();                            }                        } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (UnsupportedEncodingException e) {                            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throw</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> RuntimeException(e);                        }                        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Write the value out to the prefs file</span>                        prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString() ).commit();                    }                }            }        }    }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li><li style="box-sizing: border-box; padding: 0px 5px;">42</li><li style="box-sizing: border-box; padding: 0px 5px;">43</li><li style="box-sizing: border-box; padding: 0px 5px;">44</li><li style="box-sizing: border-box; padding: 0px 5px;">45</li><li style="box-sizing: border-box; padding: 0px 5px;">46</li><li style="box-sizing: border-box; padding: 0px 5px;">47</li><li style="box-sizing: border-box; padding: 0px 5px;">48</li><li style="box-sizing: border-box; padding: 0px 5px;">49</li><li style="box-sizing: border-box; padding: 0px 5px;">50</li><li style="box-sizing: border-box; padding: 0px 5px;">51</li><li style="box-sizing: border-box; padding: 0px 5px;">52</li><li style="box-sizing: border-box; padding: 0px 5px;">53</li><li style="box-sizing: border-box; padding: 0px 5px;">54</li><li style="box-sizing: border-box; padding: 0px 5px;">55</li><li style="box-sizing: border-box; padding: 0px 5px;">56</li><li style="box-sizing: border-box; padding: 0px 5px;">57</li><li style="box-sizing: border-box; padding: 0px 5px;">58</li></ul>

/** * Returns a unique UUID for the current android device.  As with all UUIDs, this unique ID is "very highly likely" * to be unique across all Android devices.  Much more so than ANDROID_ID is. * * The UUID is generated by using ANDROID_ID as the base key if appropriate, falling back on * TelephonyManager.getDeviceID() if ANDROID_ID is known to be incorrect, and finally falling back * on a random UUID that's persisted to SharedPreferences if getDeviceID() does not return a * usable value. * * In some rare circumstances, this ID may change.  In particular, if the device is factory reset a new device ID * may be generated.  In addition, if a user upgrades their phone from certain buggy implementations of Android 2.2 * to a newer, non-buggy version of Android, the device ID may change.  Or, if a user uninstalls your app on * a device that has neither a proper Android ID nor a Device ID, this ID may change on reinstallation. * * Note that if the code falls back on using TelephonyManager.getDeviceId(), the resulting ID will NOT * change after a factory reset.  Something to be aware of. * * Works around a bug in Android 2.2 for many devices when using ANDROID_ID directly. * * @see http://code.google.com/p/android/issues/detail?id=10603 * * @return a UUID that may be used to uniquely identify your device for most purposes. */public UUID getDeviceUuid() {    return uuid;}

}
如何获取Android手机的唯一标识？

代码: 这里是你在Android里读出唯一的 IMSI-ID / IMEI-ID 的方法。
Java:

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">String myIMSI = android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.os</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.SystemProperties</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.get</span>(android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.telephony</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.TelephonyProperties</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.PROPERTY</span>_IMSI)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">; </span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

// within my emulator it returns: 310995000000000

<code class="hljs avrasm has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">String myIMEI = android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.os</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.SystemProperties</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.get</span>(android<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.telephony</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.TelephonyProperties</span><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.PROPERTY</span>_IMEI)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">; </span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

// within my emulator it returns: 000000000000000
注：android.os.SystemProperties的标签被打上@hide了，所以sdk中并不会存在。如果需要使用，需要有android的source code支持。
3.补充
相关术语：
1)IMEI(International Mobile Equipment Identity)是国际移动设备身份码的缩写，国际移动装备辨识码，是由15位数字组成的”电子串号”，它与每台手机一一对应，而且该码是全世界唯一的。每一只手机在组装完成后都将被赋予一个全球唯一的一组号码，这个号码从生产到交付使用都将被制造生产的厂商所记录。

2)MEID(Mobile Equipment IDentifier)是全球唯一的56bit移动终端标识号。标识号会被烧入终端里，并且不能被修改。可用来对移动式设备进行身份识别和跟踪。由于ESN号段是有限的资源，基本上耗尽，可能还有少量回收利用的号段，所以制定了56位的MEID号段，用来取代32位的ESN号段。MEID主要分配给CDMA制式的手机。

3)ESN是电子序列号Electronic Serial Number的缩写。它是一个32bits长度的参数，是手机的惟一标识。

转载出处：http://www.cnblogs.com/lvcha/p/3721091.html

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