In previous sections, we mentioned that WorkManager performs background work asynchronously on your behalf. The basic implementation addresses the demands of most apps. For more advanced use cases, such as correctly handling work being stopped, you should learn about threading and concurrency in WorkManager.
There are four different types of work primitives provided by WorkManager:
Workeris the simplest implementation, and the one you have seen in previous sections. WorkManager automatically runs it on a background thread (that you can override). Read more about threading in
Workers in Threading in Worker.
CoroutineWorkeris the recommended implementation for Kotlin users.
CoroutineWorkers expose a suspending function for background work. By default, they run a default
Dispatcher, which you can customize. Read more about threading in
CoroutineWorkers in Threading in CoroutineWorker.
RxWorkeris the recommended implementation for RxJava2 users. RxWorkers should be used if a lot of your existing asynchronous code is modelled in RxJava. As with all RxJava2 concepts, you are free to choose the threading strategy of your choice. Read more about threading in
RxWorkers in Threading in RxWorker.
ListenableWorkeris the base class for
RxWorker. It is intended for Java developers who have to interact with callback-based asynchronous APIs such as
FusedLocationProviderClientand are not using RxJava2. Read more about threading in
ListenableWorkers in Threading in ListenableWorker.