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I'm facing problem with WorkManager OneTimeWorkRequest setInitialDelay.

It's work fine when app is in forground or in recent list. But When I remove App from recent list everything is messed up.

What I want to achieve ?
- I want send notification to user after few hours when some task is pending ,so after some R&D start work using WorkManager because of It's ability to Schedule Tasks without background service limitation.

Now below is code snippet which work till app is not removed from recent:

 Constraints constraints = new Constraints.Builder()
 .setRequiresBatteryNotLow(true)
 .build();

 final OneTimeWorkRequest simpleRequest = new OneTimeWorkRequest.Builder(MyWorker.class)
 .setInitialDelay(3, TimeUnit.MINUTES)
 .setConstraints(constraints)
 .addTag("simple_work")
 .build();

 WorkManager workManager = WorkManager.getInstance();

 workManager.beginUniqueWork("simple_work", ExistingWorkPolicy.KEEP, simpleRequest).enqueue();

Worker class

 public class MyWorker extends Worker 
 private NotificationUtils notificationUtils;
 public static final String EXTRA_OUTPUT_MESSAGE = "output_message";

 public MyWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) 
 super(context, workerParams);
 

 @NonNull
 @Override
 public Result doWork() 

 notificationUtils = new NotificationUtils(getApplicationContext());
 notificationUtils.showNotificationMessage("TITLE", "This is a MESSEAGE",2);

 Data output = new Data.Builder()
 .putString(EXTRA_OUTPUT_MESSAGE, "I have come from MyWorker!")
 .build();

 setOutputData(output);

 return Result.SUCCESS;
 

Problem is After Remove It from recent list It's send notification but after double time which I set. for example I set setInitialDelay 5 minutes but It's work after 10 minutes.

So ,Please guide me what I do wrong or It's not for schedule task at specific time which I set for once. I don't want to keep repeat work after It's done. I'm create just new after finish first OneTimeWorkRequest so It has to work fine as per documented beginUniqueWork.

Library I am using : implementation "android.arch.work:work-runtime:1.0.0-alpha11"

English isn't my native language so pardon me for grammatically mistake:)

You problem is not clear though please update latest work manager lib to android.arch.work:work-runtime:1.0.0-beta03

And you can explain me why do u need to enque the unique work ?

workManager.beginUniqueWork("simple_work", ExistingWorkPolicy.KEEP, simpleRequest).enqueue();

try to replace it with workManager.enque(simpleRequest); and let me know if worked