ankidroid/Anki-Android — pull request #491 by timrae (2014-09-22 04:54:05+00:00)
Title: Fix backups and change to apkg

Make a number of changes to the backups:

* Backup every time DeckPicker is successfully opened if more than 5 hours have elapsed since last backup
* Use apkg backup instead of copying raw file
* Do backup in the background using a new thread, showing a toast when it starts instead of a dialog
* Increase default number of backups from 3 to 8
* Show the usual restore dialog instead of forcing restore when RuntimeException on opening collection