无论如何，PeriodicWorkRequest都不能工作

Question

PeriodicWorkRequest根本不起作用。如您所见，我已将重复间隔设置为最少15分钟。它进入队列，然后显示正在运行，但仅此而已。什么都没发生，我都等了30分钟了！它就是不起作用。然而，OneTimeWorkRequest工作得很好，没有任何问题，但在PeriodicWorkRequest上就不走运了。请看我下面的代码：

private fun processOneTimeADayNotifyReq() {
        val oneTimeADayReq: PeriodicWorkRequest = PeriodicWorkRequest.Builder(StepCountNotificationWorker::class.java, PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS
            , TimeUnit.MINUTES)
            .build()
        val workManager: WorkManager = WorkManager.getInstance(this.context)
        workManager.enqueue(oneTimeADayReq)
        this.workerLiveData = workManager.getWorkInfoByIdLiveData(oneTimeADayReq.id)
        this.workerLiveData!!.observeForever(observeStepWorkerLiveData())
    }
    private fun observeStepWorkerLiveData(): Observer<WorkInfo> {
        return Observer {
            if (it?.state == null) {
                return@Observer
            } else {
                when (it.state) {
                    WorkInfo.State.RUNNING -> {
                        Log.i("Running: ", "running")
                    }
                    WorkInfo.State.BLOCKED -> {
                        Log.i("Blocked: ", "blocked")
                    }
                    WorkInfo.State.CANCELLED -> {
                        Log.i("Cancled: ", "canceled")
                    }
                    WorkInfo.State.ENQUEUED -> {
                        Log.i("Enqueued:", "enqueued")
                    }
                    WorkInfo.State.SUCCEEDED -> {
                        val outputData:Data = it.outputData
                        val calories: Int = outputData.getInt(Constants.STEP_COUNT_VALUE, 0)
                        Log.i("Calories: ", calories.toString())
                    }
                    WorkInfo.State.FAILED -> {

                    }
                    else -> {
                        return@Observer
                    }
                }
            }
        }
    }

我还尝试设置了flex间隔：

 val oneTimeADayReq: PeriodicWorkRequest = PeriodicWorkRequest.Builder(StepCountNotificationWorker::class.java, PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS
            , TimeUnit.MINUTES, PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS, TimeUnit.MINUTES)
            .build()

它就是不起作用！我已经尝试使用版本2.3.0-alpha01和2.3.0-beta01。不走运。我用的是谷歌像素3a，targetSdkVersion是29。有人能帮帮忙吗？谢谢。

Answer 1

您正在将重复间隔设置为900000分钟，要将其设置为15分钟，如果使用PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLI，则使用TimeUnit.MILLISECONDS

val oneTimeADayReq: PeriodicWorkRequest = PeriodicWorkRequest.Builder(
        StepCountNotificationWorker::class.java, 
        PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
        TimeUnit.MILLISECONDS).build()

在执行结束时，从RUNNING到ENQUEUED的周期性工作转换，唯一的最终状态是CANCELLED。