WorkManager | Andriod Jet pack offers variety of libraries to make ease | Android library

I am stuck and can't get my OneTimeWorkRequest to work properly.

I have got this Retrofit API call I want to resend to the backend incase there's no network connectivity or similar on the phone. What I can't wrap my head around is how to pass the call to the worker.

I've got this following code:

Here's the API Service:

So I have an issue where my existing Flutter Workmanager background task is not updating automatically following the app's update.

I have the example code which sets up a periodic Workmanager job.

As the title say, I'm using 2 plugins, workmanager and shared preferences. The workmanager part works as it's supposed to, while I get an error from shared preferences.

This is part of my code which has to do with the workmanager plugin:

Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. I got it after updating target SDK to 31. the error always come after AlarmPingSender. But i dont know any class that used AlarmPingSender.

The user should receive a notification at a specific date and time, but the notification just comes right away, instead of arriving when needed. How to make sure that the notification comes at the right time, and not immediately?

I didn't realize there was more than one constructor for periodic work requests. The clue to my confusion was in the comments of the accepted answer.

I have a few special cases I am trying to solve for while scheduling work. One of them involves doing work immediately and then creating a periodic work request. I found this in the Android's PeriodicWorkRequest documentation:

This work executes multiple times until it is cancelled, with the first execution happening immediately or as soon as the given Constraints are met.

I figured that this meant work would execute upon creating a request. However, this was not what happened in my test implementation. (For this work there is no need for a CoroutineWorker or network connection constraints but its applicable to my business need so I am testing it)

Starting Worker

I want to pass my ConnectivityManger to my Worker class. I saw this thread but serialize it to json is not an option for me.

Is there any other way?

My app is designed to use newest api.

My app is checking for unread emails in the background, the problem is that i need to save and retrieve lastCheckedDate when i last checked for emails so i can show only newly received emails.

For retrieving data from datastore i use observeLastCheckedDate() and i must call it with handler because if i dont i get:

java.lang.IllegalStateException: Cannot invoke observe on a background thread

Function observeLastCheckedDate() get called but while it finish(updates lastCheckedDate), workManager task is already finished with not-updated var lastchecked date.

In main class i avoid this problem by creating and invoking callback but here that does not work(it makes whole app freeze), so we somehow need to wait for that function to finish or get some new way of retreiving data from datastore.

My app is targeting API 31/Android 12 and version 2.7.0 of WorkManager is required for that according to Google, so in order to do that, I have added setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST) to my OneTimeWorkRequestBuilder and added the necessary changes in the AndroidManifest as well (see this link for details). However, when I ran my app I encountered this error: