Periodic Work
So far, all of the work has been for single tasks, using OneTimeWorkRequest. The other WorkRequest implementation is PeriodicWorkRequest, and as the name suggests, it is for work that should repeat with a given interval.
The interval is provided via the PeriodicWorkRequest.Builder constructor, either as a Duration or as a long and TimeUnit pair. There is a minimum allowed period, defined as PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS, presently defined as 15 minutes. Consider the supplied interval to be a suggestion, rather than a requirement.
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