WorkManager is an API that makes it easy to schedule asynchronous tasks that need to run when various constraints are met. It supports one-off and periodic tasks, chained tasks with inputs and outputs, and allows constraints to be set on when tasks run. The latest version of WorkManager provides a better in-process scheduler, new diagnostic APIs, and lint checks. It also supports RxJava 3.

1. What’s new in WorkManager
Andri Suranta Ginting - Product Engineer at Gojek

2. Plan
● What is WorkManager
● Why WorkManager
● Benefits Using WorkManager
● WorkManager Type
● Latest Update From WorkManager 2.4

3. WorkManager
WorkManager is an API that makes it easy to
● Schedule Deferrable
● Asynchronous tasks
WorkManager handles background work that needs to run when various
constraints are met

4. Why WorkManager?
● Does the task need to finish?
● Is this task deferrable?

5. Benefits
● Support asynchronous one-off and
periodic tasks
Filter Images 1 Filter Images 2

6. Benefits
● Support asynchronous one-off and
periodic tasks
● Support chained tasks with input/output
Filter Images 1 Filter Images 2
Compress
Upload

7. Benefits
● Support asynchronous one-off and
periodic tasks
● Support chained tasks with input/output
● Let you set constraints on when the task
runs
Filter Images 1 Filter Images 2
Compress
Upload
Battery
Not
low
Has
Network

8. Benefits
● Support asynchronous one-off and
periodic tasks
● Support chained tasks with input/output
● Let you set constraints on when the task
runs
● Guarantees task execution, even if the
apps is restart
● Handle compatibility with different OS
version
● Follow System health best practice
Filter Images 1 Filter Images 2
Compress
Upload
Battery
Not
low
Has
Network

9. WorkManager Worker Type
Worker RxWorker CoroutineWorker
ListenableWorker

10. class ImageFilterWorker(
appContext: Context, params: WorkerParameters
) : ListenableWorker(appContext, params) {
val future = ResolvableFuture.create<Result>()
override fun startWork(): ListenableFuture<ListenableWorker.Result> {
//do something
return future
}
}
ListenableWorker

11. class ImageFilterWorker(
appContext: Context, params: WorkerParameters
) : ListenableWorker(appContext, params) {
val future = ResolvableFuture.create<Result>()
override fun startWork():ListenableFuture<ListenableWorker.Result> {
//do something
return future
}
}
Run on
main
thread
ListenableWorker

12. class ImageFilterWorker(
appContext: Context,
params: WorkerParameters
) : Worker(appContext, params) {
override fun doWork(): Result {
return try {
//do something if success
Result.success()
} catch (throwable: Throwable) {
//do something if failed
Result.failure()
}
}
}
Worker

13. class ImageFilterWorker(
appContext: Context,
params: WorkerParameters
) : Worker(appContext, params) {
override fun doWork(): Result {
return try {
//do something if success
Result.success()
} catch (throwable: Throwable) {
//do something if failed
Result.failure()
}
}
}
Worker
Need to
synchro
nous

14. class ImageFilterWorker(
appContext: Context,
params: WorkerParameters
) : RxWorker(appContext, params) {
override fun createWork(): Single<Result>
{
return Observable.range(0, 100)
.flatmap { //do something }
.toList()
.map { Result.success() }
}
}
RxWorker

15. class ImageFilterWork(
context: Context,
params: WorkerParameters
): CoroutineWorker(context, params) {
override suspend fun doWork(): Result =
withContext(Dispatchers.IO) {
return try {
// Do something
Result.success()
} catch (error: Throwable) {
Result.failure()
}
}
CoroutineWorker

16. class ImageFilterWork(
context: Context,
params: WorkerParameters
): CoroutineWorker(context, params) {
override suspend fun doWork(): Result =
withContext(Dispatchers.IO) {
return try {
// Do something
Result.success()
} catch (error: Throwable) {
Result.failure()
}
}
CoroutineWorker

17. Cancel Worker
val worker = OneTimeRequestBuilder<SomeWorker>()
.addTag(YOUR_TAG)
.build()
WorkManager.getInstance().cancelWorkById(worker.id)

18. Cancel Worker
val worker = OneTimeRequestBuilder<SomeWorker>()
.addTag(YOUR_TAG)
.build()
WorkManager.getInstance().cancelWorkById(worker.id)

19. Cancel Worker
val worker = OneTimeRequestBuilder<SomeWorker>()
.addTag(YOUR_TAG)
.build()
WorkManager.getInstance().cancelWorkById(worker.id)

20. Cancel Worker
val worker = OneTimeRequestBuilder<SomeWorker>()
.addTag(YOUR_TAG)
.build()
WorkManager.getInstance().cancelWorkById(worker.id)
WorkManager.getInstance().cancelWorkById(YOUR_TAG)

21. Unique Worker
There are 3 policies for unique worker that applied for OneTimeWorker
● KEEP
● REPLACE
● APPEND
There are 2 policies for unique worker that applied for PeriodicWorker
● KEEP
● REPLACE

22. WorkManager config
● Provide custom worker
● Setup logging level
● Setup custom WorkerFactory
<provider
android:name="androidx.work.impl.WorkManagerInitializer"
android:authorities="${applicationId}.workmanager-init"
android:node="remove"/>

23. WorkManager 2.4
Better in-process scheduler

24. Better Diagnostics
Introduce new API that can invoke with ADB
//pass logcat to adb
adb shell am broadcast
-a "androidx.work.diagnostic.REQUEST_DIAGNOSTIC"
-p "package_name"
//view logcat
adb logcat

25. Better Diagnostics
Introduce new API that can invoke with ADB
//pass logcat to adb
adb shell am broadcast
-a "androidx.work.diagnostic.REQUEST_DIAGNOSTIC"
-p "package_name"
//view logcat
adb logcat

26. Lint Checks
class ImageFilterWork(
context: Context,
params: WorkerParameters
): CoroutineWorker(context, params) {
override suspend fun doWork(): Result {
return Result.success()
}
}

27. Lint Checks
private class ImageFilterWork(
context: Context,
params: WorkerParameters
): CoroutineWorker(context, params) {
override suspend fun doWork(): Result {
return Result.success()
}
}
Error: ImageFilterWorker
need to public

28. Support RxJava 3
implementation "androidx.work:work-rxjava3:2.4.0-alpha03"

29. References
● https://developer.android.com/topi
c/libraries/architecture/workmanag
er
● https://codelabs.developers.google.
com/codelabs/android-workmanag
er/#0
● https://medium.com/androiddevelo
pers/introducing-workmanager-208
3bcfc4712

30. Andri Suranta Ginting
http://linkedin.com/in/andriiginting
https://github.com/andriiginting