workManger | laravelvue.js 前后端分离实战项目 | Frontend Framework library

• I need to track and update download status(start,pause,play,done) of multiple files in a list that I get from some Api (can't share), onto a RecyclerView.

• I am also getting a fileId so each file can be distinguished.

• I need download tracking based on the fileId because the Download list is also searchable, it means that the position of items will change and so we can't rely on position based ViewHolder refreshing.

• Also if for some reason you close the app, and then go back to the list, search the file, it should show the file download status.

• Now there are three options :
  a) WorkManager based implementation (how this option can be implemented?)
  b) PRDownloader (how this option can be implemented?)
  c) Or Android's download manager? (Need to be sure that we need to show progress of multiple files at same time in a list.)

• Which one is better and more reliable?

• Which one is the shortest method?

  Also can someone share if you have code based on work manager?(how will you manage to relate fileId to workManger's work id. Do I need to make a DB table for keeping track of downloads by the Worker? How to use LiveData from workManager, iff we can in the ViewHolder )

[Reference to Blog/Code/Repos will be most helpful]

I am reading about WorkManager (https://developer.android.com/guide/background). What confuses me are the 2 conflicting statements. It says WorkManager should be used:

1. For tasks that should be executed immediately and need continued processing
2. For tasks that can run at any time in the future can be and deferred

Can someone explain this and show me 2 simple examples with the code of WorkManger that does statement number1 and statement number2 situations. Thanks

I just recently upgraded my old project from target sdk version 26 to 28 and used AndroidX in order to use WorkManager library. I also upgraded my Android Studio to version 4.0.

I have one external jar library commons-httpclient-3.1-rc1.jar (implementation files('libs/commons-httpclient-3.1-rc1.jar')). The build process run well and my application could start normaly. But i got the following warning when my app starting the background sync process (using workmanger). The sync class used some classes from commons-httpclient library.

In Android Jetpack WorkManger, define a output data in Worker:

I'm working on a multi module project (Gradle module). I'm using WorkManager in my module. I'm also making use of Dagger for dependency injection. Now I have to use dagger to inject dependencies to my WorkManager. I'm quite familiar with Dagger 2 setup with WorkManager. But the problem I'm facing is, I have to use worker factory to make it compatible with dagger. So that I can inject dependencies with the help of Dagger Multi bindings. But currently the WorkManager configuration in the main module (Main app gradle module) is

I have an app that should show a notification every 2 hours and should stop if user has already acted upon the notif. Since background services are history now, I thought of using WorkManager ("android.arch.work:work-runtime:1.0.0-beta01") for the same.

My problem is that although the work manager is successfully showing the notifications when app is running, but it won't show notification consistently in the following cases(I reduced the time span from 2 hours to 2 minutes to check the consistency):

• when app is killed from the background.
• device is in screen off.
• state device is in unplugged state(i.e not charging).

By consistency , i mean that the notifications show at least once in the given time span. for 2 minutes time span, the freq of notifications went from once every 4 minutes to completely not show any notification at all. for 2 hours timespan( the timespan that i actually want), its been 4 hours and i haven't got a single notification. Here is the Code i am using for calling WorkManger:

I am uploading photos in my app and want to provide the User with the upload progress. The way I was going to do this is have a global tag, UPLOAD_MEDIA_TAG and use that whenever I am creating a OneTimeWorkRequest. That way I can just observe the WorkManager.getInstance().getStatusesByTag(UPLOAD_MEDIA_TAG) LiveData, and whenever a job completes I would show a percent completed. (I.E. Uploading 3/10 photos would show 30%). Then once all 10/10 photos have been uploaded, I would hide the progress bar. This works great as it easily supports leaving the app, coming back, and you will see the Progress Bar as soon as the app launches right where they left off.

The problem is that once all 10/10 jobs are finished and marked as completed, those jobs will stick around until the WorkManger prunes them. So if the user uploads 5 more photos, the LiveData is returning 15 statuses instead of 5, throwing off the percent calculation.

I noticed there is a method OneTimeWorkRequest.keepResultsForAtLeast(duration) but what I would want is something like, keepResultsForAtMost(duration) or a WorkManager.getInstance().forcePrune() method that would cleanup all the completed jobs from the database.

Any help would be great!

I am trying to make use of WorkManager however I seem to be running into an issue where PeriodicSync is only repeated on startup once and that's it.

I've looked at this post Is WorkManager's PeriodicWorkRequest really repeating for anyone? but there is no answer there. I am using the latest alpha build 10 as well.

If someone could help, it would be greatly appreciated. I am still new to android but need to get this to work for a project. I haven't even tried using it with the code I want but simply trying to get it to run correctly.

I set it to run every 10 seconds, I also tried 10,000 ms but neither worked and nothing happened after 10 seconds.

The Log message "Sync" only appears once onCreate and that's it.

Another issue I have is that every time I launch my app, it seems like the number of workers increases, as if they are getting added on top of each other and I don't know if that's related. Answer to my other issue was found here but I still need help with my primary issue.

Here's my code:

The Worker Class

I have implementation of websocket using workmanager and it is working fine in weblogic.

Below is my web.xml and weblogic.xml