getDeviceUuid
public UUID getDeviceUuid()
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.
- Returns:
- a UUID that may be used to uniquely identify your device for most
purposes.
- See Also:
http://code.google.com/p/android/issues/detail?id=10603