android手机唯一识别码

// http://blog.csdn.net/billpig/article/details/6728573 public UUID DeviceUuidBuild(Context context) {
synchronized (this)
{
if( uuid == null)
{
final SharedPreferences prefs = context.getSharedPreferences( PREFS_FILE, 0);
final String id = prefs.getString(PREFS_DEVICE_ID, null );

if (id != null)
{
uuid = UUID.fromString(id);
}
else
{
final String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);
try {
if (!"9774d56d682e549c".equals(androidId)) //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
{
uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
}
else
{
final String deviceId = ((TelephonyManager) context.getSystemService( Context.TELEPHONY_SERVICE )).getDeviceId();
uuid = deviceId != null ? UUID.nameUUIDFromBytes(deviceId.getBytes("utf8")) : UUID.randomUUID();
}
}
catch (UnsupportedEncodingException e)
{
throw new RuntimeException(e);
}
prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString() ).commit();
}
}
}

return uuid;
}