如何在Android中从WorkManager取消工作?

问题描述

我已将转换为String的WorkManager UUID保存在Realm数据库中.

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

这是代码-

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();
            }

现在，我正在尝试使用此代码行取消Work，但是没有用.

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

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

任何帮助将不胜感激

谢谢

推荐答案

如果您使用的是Worker，则需要覆盖 onStopped() 方法，并以此为您的工作人员取消正在进行的工作的信号.在您的doWork()方法中，您还可以使用 isStopped() 检查取消.

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.

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