问题
In iOS 6, [UIDevice currentDevice].identifierForVendor provides a unique ID across all the apps from a single vendor.
Is there any way to do the same thing in Android?
回答1:
There is the Android Id:
Generating Device-Specific Serial Number
Note that Android is designed so you can't automatically get a full device id. Android even modified a pre-existing part of linux that would have made this possible.
Even better than Android id: your app can request the AUTHENTICATE_ACCOUNTS permission. Then you know the user's Google id. This will be common across all apps and phones the user uses.
来源：https://stackoverflow.com/questions/14657977/is-there-an-equivalent-to-ios-identifierforvendor-for-android