Problems restoring to multiple devices using Android BackupManager
问题 I've implemented backup/restore of SharedPreferences using BackupManager as per the Android docs, but I'm having trouble restoring preferences to a second device. I believe the implementation is fine, since I can restore settings to a single device, i.e. if I run the app, make changes, uninstall and reinstall I get the modified preferences that I expect. However, if I subsequently install the app on a second device, I don't see the changes, even if I use the bmgr tool to force a backup on the