Android Unique ID

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Is there a unique Android device ID? 40 answers

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Create an ID locally, store it in prefs, and then back it up using Data Backup to the cloud via the user's Google Account, so when they reinstall it, the settings come back

http://developer.android.com/guide/topics/data/backup.html

链接地址: http://www.djcxy.com/p/24650.html

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