fixed: changed contacts visibility on every sync
fixed: crash on database upgrade
various refactoring and optimizations
Please note that if you upgrade from v <1.9 to 1.9.4 ≤ v < 1.9.10 directly, the upgrade will still fail (causing all collections to be shown as read-only without possibility to change that). In this case, you have to uninstall DAVdroid and install it again (or to delete all DAVdroid accounts, clear app storage and add the accounts again).
Upgrading from any version, including <1.9, to 1.9.10 should work without problems.
added verbose information about current local and remote resource to debug info (helps to find faulty contacts/events, for instance when they’re not parseable)
new translations, which also fix a crash in the Spanish version