WorkerFactory

abstract class WorkerFactory

<init>

WorkerFactory()

A factory object that creates ListenableWorker instances. The factory is invoked every time a work runs. You can override the default implementation of this factory by manually initializing WorkManager (see WorkManager#initialize(Context, Configuration) and specifying a new WorkerFactory in Configuration.Builder#setWorkerFactory(WorkerFactory).

createWorker

@Nullable abstract fun createWorker(
    @NonNull appContext: Context, 
    @NonNull workerClassName: String, 
    @NonNull workerParameters: WorkerParameters
): ListenableWorker?

Override this method to implement your custom worker-creation logic. Use Configuration.Builder#setWorkerFactory(WorkerFactory) to use your custom class.

Throwing an Exception here will crash the application. If a WorkerFactory is unable to create an instance of the ListenableWorker, it should return null so it can delegate to the default WorkerFactory.

Returns a new instance of the specified workerClassName given the arguments. The returned worker must be a newly-created instance and must not have been previously returned or invoked by WorkManager. Otherwise, WorkManager will throw an IllegalStateException.

Parameters
appContext	Context: The application context
workerClassName	String: The class name of the worker to create
workerParameters	WorkerParameters: Parameters for worker initialization

Return
ListenableWorker?	A new ListenableWorker instance of type workerClassName, or null if the worker could not be created