How to cancel Work from WorkManager in Android?

问题

I have saved the WorkManager UUID converted to String in Realm database.

Here is the code -

Constraints constraints = new Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build();
            Data inputData = new Data.Builder().putString("downloadUrl", downloadUrl).
                    putString("destinationFolder", destinationFolder).
                    putInt("suraNumber", Integer.parseInt(suraNumber)).
                    putString("fileName", fileName).
                    putBoolean("downloadFileTypeBangla", downloadFileTypeBangla).
                    putBoolean("downloadFileTypeArabic", downloadFileTypeArabic).
                    putBoolean("downloadFileTypeArabicWithBangla", downloadFileTypeArabicWithBangla).build();
            OneTimeWorkRequest downloadWork = new OneTimeWorkRequest.Builder(DownloadWorker.class).setConstraints(constraints).setInputData(inputData).build();
            WorkManager.getInstance().enqueue(downloadWork);

            Sura sura = dbOperations.getSuraById(Integer.parseInt(suraNumber));
            if(sura != null){
                dbOperations.updateSura(sura, Integer.parseInt(suraNumber), sura.getBnAudioDownloadStatus(), sura.getArAudioDownloadStatus(), 1);
                realm.beginTransaction();
                DownloadStatusModel downloadStatusModel = new DownloadStatusModel();
                downloadStatusModel.setId(new RealmCommonService(realm).newId(DownloadStatusModel.class));
                downloadStatusModel.setDownloadFileType("ArabicWithBangla");
                downloadStatusModel.setActiveStatus(true);
                downloadStatusModel.setDownloadDate(new Date());
                downloadStatusModel.setDownloadedSuraNo(sura.getSuraNo());
                downloadStatusModel.setDownloadFileSize(sura.getArBnAudioFileSize());
                downloadStatusModel.setDownloadReferenceId(downloadWork.getId().toString());
                downloadStatusModel.setDownloadedSuraNameBangla(sura.getSuraNameBangla());
                downloadStatusModel.setDownloadStatus(1);
                realm.copyToRealm(downloadStatusModel);
                realm.commitTransaction();
            }

Now I'm trying to cancel the Work using this line of code but didn't work.

WorkManager.getInstance().cancelWorkById(UUID.fromString(downloadStatusModel.getDownloadReferenceId()));

Any help would be appreciated

Thanks

回答1:

If you're using Worker, you need to override the onStopped() method and use that as the signal for your worker to cancel its ongoing work. Within your doWork() method, you can also use isStopped() to check for cancellation.

来源：https://stackoverflow.com/questions/53441122/how-to-cancel-work-from-workmanager-in-android