of the last successful periodic mail and computes the next start time
as an offset from that successful finish. The ramifications of this
new method is that changing polling interval on an account does not
force delaying all accounts to poll next in the future by the new
interval. Instead, K-9 Mail now adjusts the next poll time based on
what the next poll time should be based on the last poll finish and
the new interval.
Example 1: In the old way, if the old polling interval was 1 hour, and
the next poll was 50 minutes away (10 minutes have passed), and you
changed the interval to 15 minutes, the poll would happen 15 minutes
from now. In the new way, the next poll will happen only 5 minutes
from now, which is 15 minutes since the last poll.
Example 2: In the old way, if the old polling interval was 1 hour, and
the next poll was 10 minutes away (50 minutes have passed), and you
changed the interval to 30 minutes, the poll would happen 30 minutes
from now. The next poll would then happen actually 80 minutes after
the previous poll completed. In the new way, it'll actually happen
immediately, because the time for the next poll, based on the new
schedule, has already passed.
Similar scenarios happen when a loss of network connectivity
occurs. In the old way, polling would resume using the restoration of
connectivity as the starting point. Each time network connectivity
was lost and restored, the next poll would be further delayed. *If
connectivity was lost and restored frequently, a poll might never
happen!* In the new way, the next poll is rescheduled based on the
time of the last successful poll, so will be rescheduled just like it
was before the loss of connectivity. If the time has already been
passed, the poll will happen immediately.
Provide for setting Sent folder to -NONE- which suppresses actually
saving sent mail in any folder.
Also, eliminate logging which folders are not configured for pushing.
It was just too much logging.
Only reschedule polling and setup pushing when necessary due to
particular setting changes. Makes the K-9 Mail UI much more
responsive to setting changes that do not affect polling and pushing.
The poll schedule is deliberately only rescheduled when the period is
decreased. An increase in period will still allow the next scheduled
check to happen as originally scheduled.
Fixes Issue 1034
Refresh Account from Preferences, so that it'll have a fresh copy of
all information. Failure to do this caused the AccountSettings
Activity to show stale information when invoked repeatedly from the
same prior Activity.
Provides for menu items to quickly change the mode of displayed
folders. Also, reorganizes the menu to have an Advanced sub-menu,
like Accounts page has.
Desparately needs a new icon for the Folders menu item.
physical keyboards, though, and should be modified to only re-setup
pushers. Current implementation causes a wasteful reschedule of
polling.
Also gets the help Toast for the folder up-to-date after the
FolderList/MessageList split.
