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Work Manager in Android: Dawood Ilyas

WorkManager is an Android library that schedules deferrable background work in a reliable way. It is intended for tasks that need to run even if the app exits, like image processing or uploading files. WorkManager uses JobScheduler on API 23+ and AlarmManager + BroadcastReceiver on older APIs to ensure tasks run. It allows scheduling one-off or periodic tasks, adding constraints like network availability, chaining tasks together, and monitoring/managing scheduled work. Key components include Worker classes, WorkRequests, WorkManager, and WorkInfo.

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146 views23 pages

Work Manager in Android: Dawood Ilyas

WorkManager is an Android library that schedules deferrable background work in a reliable way. It is intended for tasks that need to run even if the app exits, like image processing or uploading files. WorkManager uses JobScheduler on API 23+ and AlarmManager + BroadcastReceiver on older APIs to ensure tasks run. It allows scheduling one-off or periodic tasks, adding constraints like network availability, chaining tasks together, and monitoring/managing scheduled work. Key components include Worker classes, WorkRequests, WorkManager, and WorkInfo.

Uploaded by

Dawood Ilas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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WORK MANAGER IN Dawood Ilyas

ANDROID
WHAT IS IT?

WorkManager is an Android library that runs deferrable background work when


the work’s constraints are satisfied.
WorkManager is intended for tasks that require a guarantee that the system will run
them even if the app exits.
A BIT HISTORY ABOUT ITS
PREDECESSORS
 Services
 Job Schedulers
 Job Dispatchers
 Foreground services
 Alarm Manager
WHEN TO USE IT?
UNDER THE HOOD
KEY FEATURES:
Backwards compatible up to API 14
oUses JobScheduler on devices with API 23+
oUses a combination of BroadcastReceiver + AlarmManager on devices with API 14-
22
Add work constraints like network availability or charging status
Schedule asynchronous one-off or periodic tasks
Monitor and manage scheduled tasks
Chain tasks together
Ensures task execution, even if the app or device restarts
Adheres to power-saving features like Doze mode
KEY COMPONENTS:
Worker classs
WorkRequest
OneTimeWorkRequest
PeriodicWorkRequest
WorkManager
WorkInfo
WORKER CLASS

For creating a worker we need to create a class that


is extending Worker
DEFINING Kotlin:
INPUT/OUTPUT
Input and output values are stored as key-value
pairs in a Data object.

Java:
WORK REQUEST:
ONETIMEWORKREQUEST
WORK REQUEST:
PERIODICWORKREQUEST
WORK CONSTRAINTS
WORK REQUEST
REAL POWER OF WORK
MANAGER: CHAINING
What if we wanted to filter multiple images, then compress them. and then upload
them. If you want to run a series of WorkRequests, one after the other or even in
parallel, you can use a chain.
The example diagram shows a chain where you have three filter tasks run in parallel,
followed by a compress task and an upload task, run in sequence:
CODE
Assuming you have created all your WorkRequests with the appropriate constraints, the
code looks like:
WORK INFO’S STATES
LIFE CYCLE OF WORK
TAGGING WORK
OBSERVING WORK
UNIQUE WORK
STOPPING A RUNNING TASK
REFERENCES
https://developer.android.com/topic/libraries/architecture/workmanage
https://medium.com/google-developer-experts/services-the-life-with-without-and-w
orker-6933111d62a6

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