标签：
安卓设备唯一码工具类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
import
android.content.Context;import
android.content.SharedPreferences;import
android.provider.Settings.Secure;import
android.telephony.TelephonyManager;import
java.io.UnsupportedEncodingException;import
java.util.UUID;public
class
DeviceUuidFactory { protected
static
final
String PREFS_FILE = "device_id.xml"; protected
static
final
String PREFS_DEVICE_ID = "device_id"; protected
static
UUID uuid; public
DeviceUuidFactory(Context context) { if(
uuid ==null
) { synchronized
(DeviceUuidFactory.class)
{ if(
uuid == null)
{ final
SharedPreferences prefs = context.getSharedPreferences( PREFS_FILE, 0); final
String id = prefs.getString(PREFS_DEVICE_ID, null
); if
(id != null)
{ //
Use the ids previously computed and stored in the prefs file uuid
= UUID.fromString(id); }
else
{ final
String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID); //
Use the Android ID unless it‘s broken, in which case fallback on deviceId, //
unless it‘s not available, then fallback on a random number which we store //
to a prefs file try
{ if
(!"9774d56d682e549c".equals(androidId))
{ 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); } //
Write the value out to the prefs file prefs.edit().putString(PREFS_DEVICE_ID,
uuid.toString() ).commit(); } } } } } /** *
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; }} |
标签：
原文地址：http://blog.csdn.net/u014311064/article/details/42649765
