WorkManager是一个用于排队工作的库,保证在满足约束条件后执行。
因此,在完成Constraints课程之后,我还没有找到任何增加工作时间限制的功能。例如,我想在上午8:00开始工作(工作可以是两种类型中的任何一种OneTimeWorkRequest或PeriodicWorkRequest)。如何使用WorkManager添加约束来安排此工作。
答案 0 :(得分:25)
不幸的是,截至目前,您无法在特定时间安排工作。如果您有时间关键的实现,那么您应该使用AlarmManager来设置在Doze中可以使用setAndAllowWhileIdle()或setExactAndAllowWhileIdle()时触发的警报。
您可以使用WorkManager
安排一次初始延迟工作或定期执行,如下所示:
创建工人类:
public class MyWorker extends Worker {
@Override
public Worker.WorkerResult doWork() {
// Do the work here
// Indicate success or failure with your return value:
return WorkerResult.SUCCESS;
// (Returning RETRY tells WorkManager to try this task again
// later; FAILURE says not to try again.)
}
}
然后按如下方式安排OneTimeWorkRequest
:
OneTimeWorkRequest mywork=
new OneTimeWorkRequest.Builder(MyWorker.class)
.setInitialDelay(<duration>, <TimeUnit>)// Use this when you want to add initial delay or schedule initial work to `OneTimeWorkRequest` e.g. setInitialDelay(2, TimeUnit.HOURS)
.build();
WorkManager.getInstance().enqueue(mywork);
// Create a Constraints that defines when the task should run
Constraints myConstraints = new Constraints.Builder()
.setRequiresDeviceIdle(true)
.setRequiresCharging(true)
// Many other constraints are available, see the
// Constraints.Builder reference
.build();
然后创建使用这些约束的OneTimeWorkRequest
OneTimeWorkRequest mywork=
new OneTimeWorkRequest.Builder(MyWorker.class)
.setConstraints(myConstraints)
.build();
WorkManager.getInstance().enqueue(mywork);
PeriodicWorkRequest periodicWork = new PeriodicWorkRequest.Builder(MyWorker.class, 12, TimeUnit.HOURS)
.build();
WorkManager.getInstance().enqueue(periodicWork);
这会创建一个PeriodicWorkRequest,每12个小时定期运行一次。
答案 1 :(得分:5)
到目前为止,无法使用m = as.matrix(read.table(header=T, text=' A B C D
"0/0" "0/1" "0/0" "1/1"
"1/1" "1/1" "0/1" "0/1"
"1/2" "0/3" "1/1" "2/2"
"0/0" "0/0" "2/2" "0/0"
"0/0" "0/0" "0/0" "0/0"'))
m = do.call(cbind, replicate(40 , m, simplify = FALSE))
m = do.call(rbind, replicate(3000, m, simplify = FALSE))
colnames(m) = paste0("A", 1:160)
获得准确的时间。
一个丑陋的解决方法将使用PeriodicWorkRequest
,并且在触发时,使用新的计算周期设置另一个OneTimeWorkRequest
,依此类推。
答案 2 :(得分:2)
我可能会迟到一些,但是无论如何我都是这样做的,目的是在给定的时间安排WorkRequest(有一个可选的短暂延迟)。您只需要从TimePicker获取以下时间即可:
public static void scheduleWork(int hour, int minute) {
Calendar calendar = Calendar.getInstance();
long nowMillis = calendar.getTimeInMillis();
if(calendar.get(Calendar.HOUR_OF_DAY) > hour ||
(calendar.get(Calendar.HOUR_OF_DAY) == hour && calendar.get(Calendar.MINUTE)+1 >= minute)) {
calendar.add(Calendar.DAY_OF_MONTH, 1);
}
calendar.set(Calendar.HOUR_OF_DAY,hour);
calendar.set(Calendar.MINUTE,minute);
calendar.set(Calendar.SECOND,0);
calendar.set(Calendar.MILLISECOND,0);
long diff = calendar.getTimeInMillis() - nowMillis;
WorkManager mWorkManager = WorkManager.getInstance();
Constraints constraints = new Constraints.Builder()
.setRequiredNetworkType(NetworkType.CONNECTED)
.build();
mWorkManager.cancelAllWorkByTag(WORK_TAG);
OneTimeWorkRequest mRequest = new OneTimeWorkRequest.Builder(NotificationWorker.class)
.setConstraints(constraints)
.setInitialDelay(diff,TimeUnit.MILLISECONDS)
.addTag(WORK_TAG)
.build();
mWorkManager.enqueue(mRequest);
}
答案 3 :(得分:1)
您可以从evernote中使用AndroidJob
class NotificationJob : DailyJob() {
override fun onRunDailyJob(params: Params): DailyJobResult {
//your job
return DailyJobResult.SUCCESS
}
companion object {
val TAG = "NotificationJob"
fun scheduleJob() {
//scheduled between 9-10 am
DailyJob.schedule(JobRequest.Builder(TAG),
TimeUnit.HOURS.toMillis(9),TimeUnit.HOURS.toMillis(10 ))
}
}
}
和通知创建者
class NotificationJobCreator : JobCreator {
override fun create(tag: String): Job? {
return when (tag) {
NotificationJob.TAG ->
NotificationJob()
else ->
null
}
}
}
然后在您的Application类中启动
JobManager.create(this).addJobCreator(NotificationJobCreator())
gradle依赖项是
dependencies {
implementation 'com.evernote:android-job:1.2.6'
// or this with workmnager
implementation 'com.evernote:android-job:1.3.0-alpha08'
}
答案 4 :(得分:0)
如果您要将初始延迟设置为 PeriodicWorkRequest ,我在此处介绍了解决方案:
答案 5 :(得分:0)
所有答案现在已过时,请升级到WorkManager 2.1.0-alpha02(或更高版本) setInitialDelay()方法过去仅适用于OneTimeWorkRequest,但现在它们也支持PeriodicWorkRequest。
implementation "androidx.work:work-runtime:2.1.0-alpha02"
PeriodicWorkRequests现在支持初始延迟。您可以使用 在PeriodicWorkRequest.Builder上使用setInitialDelay方法来设置 初始延迟
快速示例:
new PeriodicWorkRequest.Builder(MyWorker.class,
MY_REPEATS, TimeUnit.HOURS).setInitialDelay(THE_DELAY,TimeUnit.SECONDS);
答案 6 :(得分:0)
PeriodicWorkRequests现在支持版本2.1.0-alpha02的初始延迟。您可以在PeriodicWorkRequest.Builder上使用setInitialDelay方法来设置初始延迟。 Link Here
每天8:00的时间表示例。这里我使用joda time library进行时间操作。
final int SELF_REMINDER_HOUR = 8;
if (DateTime.now().getHourOfDay() < SELF_REMINDER_HOUR) {
delay = new Duration(DateTime.now() , DateTime.now().withTimeAtStartOfDay().plusHours(SELF_REMINDER_HOUR)).getStandardMinutes();
} else {
delay = new Duration(DateTime.now() , DateTime.now().withTimeAtStartOfDay().plusDays(1).plusHours(SELF_REMINDER_HOUR)).getStandardMinutes();
}
PeriodicWorkRequest workRequest = new PeriodicWorkRequest.Builder(
WorkerReminderPeriodic.class,
24,
TimeUnit.HOURS,
PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS,
TimeUnit.MILLISECONDS)
.setInitialDelay(delay, TimeUnit.MINUTES)
.addTag("send_reminder_periodic")
.build();
WorkManager.getInstance()
.enqueueUniquePeriodicWork("send_reminder_periodic", ExistingPeriodicWorkPolicy.REPLACE, workRequest);
答案 7 :(得分:0)
我尝试过OneTimeWorkRequest,但它很不稳定(有时只能工作),因此我们不应该依赖它。 AlarmManager是更好的选择。