延迟为链的多个 OneTimeWorkRequests

Question

我正在制作一个应用程序 Medicine Reminder，它应该根据数据库中保存的日期和时间来提醒药物消耗。提醒应以通知的形式进行。假设我有一种药物应该服用两次（例如在 9:50 pm 和 9:55 pm 进行快速测试）。单击按钮会触发通知。

我的问题 - 只显示第一个通知，其他的不显示。

这是我的代码：

public void makeNotifications(Date now, String[] medicineNames, Date[] 
takingTime) {

    WorkContinuation continuation = null;

    for (int i = 1; i < medicineNames.length + 1; i++) {

        Data.Builder dataBuilder = new Data.Builder()
                .putString(MEDICINE_NAME_KEY, medicineNames[i - 1])
                .putLong(MEDICINE_TAKING_TIME_KEY, takingTime[i - 1].getTime());
        OneTimeWorkRequest.Builder requestBuilder =
                new OneTimeWorkRequest.Builder(NotificationWorker.class)
                        .setInputData(dataBuilder.build());

        if (i == 1) {
            long diff = Math.abs(takingTime[i - 1].getTime() - now.getTime());
            requestBuilder.setInitialDelay(diff, TimeUnit.MILLISECONDS);
            continuation = mWorkManager.beginUniqueWork(
                    MEDICINE_NOTIFICATION_KEY,
                    ExistingWorkPolicy.KEEP,
                    requestBuilder.build());
        } else {
            long diff = Math.abs(takingTime[i - 1].getTime() - now.getTime());
            requestBuilder.setInitialDelay(diff, TimeUnit.MILLISECONDS);
            continuation.then(requestBuilder.build());
        }
    }
    continuation.enqueue();
}

你有suggestion/explanation/solution吗？

Answer 1

WorkManager 不是您用例的最佳解决方案，因为您需要在 特定时间 完成一些琐碎的工作。 WorkManager 将遵守休眠模式条件，如果设备处于休眠模式，您的通知将不会发布。

我建议您改用 AlarmManager。使用 AlarmManager

的 setAndAllowWhileIdle() 或 setExactAndAllowWhileIdle()

基于documentation：

Standard AlarmManager alarms (including setExact() and setWindow()) are deferred to the next maintenance window.

If you need to set alarms that fire while in Doze, use setAndAllowWhileIdle() or setExactAndAllowWhileIdle().

Alarms set with setAlarmClock() continue to fire normally — the system exits Doze shortly before those alarms fire.

延迟为链的多个 OneTimeWorkRequests

Multiple OneTimeWorkRequests with delay as chain

android

android-jetpack

android-workmanager