WorkManager PeriodicWorkRequest 运行立即

Question

我创建了一个周期性的 WorkManager 以在 12 小时后发送通知。问题是，当我发送调用来安排 WorkManager 时，工作会立即完成，并且还会在 12 小时后按计划完成。我不希望 WorkManager 立即执行，而是在预定的小时后执行。

来自 MainClass 的调用：

  Constraints constraints = new Constraints.Builder()
                //wifi only
                .setRequiredNetworkType(NetworkType.UNMETERED)
                .build();

        PeriodicWorkRequest periodicWork = new PeriodicWorkRequest.Builder(WorkManagerCheckReport.class, 12, TimeUnit.HOURS)
                .addTag(TAG)
                .setConstraints(constraints)
                .build();

    WorkManager.getInstance(getApplicationContext()).enqueueUniquePeriodicWork(TAGWORKMANAGER, ExistingPeriodicWorkPolicy.KEEP, periodicWork);

工作管理器class:

class WorkManagerCheckReport(context: Context, params: WorkerParameters) : Worker(context, params) {

    var id = 0
    private val TAG = "WorkManagerCheckReport"

    //flag to keep track if document is available to the patient.
    private var flagReportNotification = false
    private var isReportNOTAvailableToPatient = false

    override fun doWork(): Result {
        Customer.log(TAG, "Workmanager called.")

        id = inputData.getLong(NOTIFICATION_ID, 0).toInt()

        sendNotification()

        return success()
    }

Answer 1

你可以试试这个：

PeriodicWorkRequest periodicWork = new 
PeriodicWorkRequest.Builder(WorkManagerCheckReport.class, 12, TimeUnit.HOURS)
            .addTag(TAG)
            .setConstraints(constraints)
            .setInitialDelay(12, TimeUnit.HOURS)
            .build();

设置 WorkRequest

的初始延迟

Answer 2

更好的方法是设置弹性间隔，以便作业在您指定的时间间隔结束时执行，比如 12 小时，将弹性间隔设置为 1 小时。您的工作将运行在每 12 小时的最后一小时之间。

PeriodicWorkRequest periodicWork = new PeriodicWorkRequest.Builder(WorkManagerCheckReport.class, 12, TimeUnit.HOURS, 1, TimeUnit.HOURS)
            .addTag(TAG)
            .setConstraints(constraints)
            .build();

WorkManager PeriodicWorkRequest 运行立即

WorkManager PeriodicWorkRequest running inmediately

android

android-workmanager

WorkManager PeriodicWorkRequest 运行 立即

WorkManager PeriodicWorkRequest running inmediately

android

android-workmanager

WorkManager PeriodicWorkRequest 运行立即