How can I check if WorkManager
is scheduled already.
Here is my code that schedule WorkManager
.
public static void scheduleWork() {
PeriodicWorkRequest.Builder photoCheckBuilder =
new PeriodicWorkRequest.Builder(WorkManagerService.class, TIME_INTERVAL_IN_SECONDS,
TimeUnit.SECONDS);
PeriodicWorkRequest photoCheckWork = photoCheckBuilder.build();
WorkManager instance = WorkManager.getInstance();
if (instance != null) {
instance.enqueueUniquePeriodicWork("TAG", ExistingPeriodicWorkPolicy.KEEP , photoCheckWork);
}
}
I call scheduleWork()
in onCreate()
of my Application
class.
Even I can check my service is running or not by this method. But I don't want schedule WorkManager if it is already scheduled to remove inconsistency in scheduled time.
Like
if(!workManagerIsScheduled())
{
scheduleWork();
}
Any solutions?
If you need to check already running work manager just because you don't want duplicate works. You can simply use enqueueUniquePeriodicWork()
This method allows you to enqueue a uniquely-named PeriodicWorkRequest, where only one PeriodicWorkRequest of a particular name can be active at a time. For example, you may only want one sync operation to be active. If there is one pending, you can choose to let it run or replace it with your new work.
So you don't need to worry about duplicacy about works.
workmanager.enqueueUniquePeriodicWork(TAG, ExistingPeriodicWorkPolicy.KEEP , photoCheckWork);
ExistingPeriodicWorkPolicy.KEEP
and ExistingPeriodicWorkPolicy.REPLACE
.I created this method when I did not find any.
if (your_work_manager.version >= 1.0.0-alpha11)
private boolean isWorkScheduled(String tag) {
WorkManager instance = WorkManager.getInstance();
ListenableFuture<List<WorkInfo>> statuses = instance.getWorkInfosByTag(tag);
try {
boolean running = false;
List<WorkInfo> workInfoList = statuses.get();
for (WorkInfo workInfo : workInfoList) {
WorkInfo.State state = workInfo.getState();
running = state == WorkInfo.State.RUNNING | state == WorkInfo.State.ENQUEUED;
}
return running;
} catch (ExecutionException e) {
e.printStackTrace();
return false;
} catch (InterruptedException e) {
e.printStackTrace();
return false;
}
}
if (your_work_manager.version < 1.0.0-alpha11)
private boolean isWorkScheduled(String tag) {
WorkManager instance = WorkManager.getInstance();
LiveData<List<WorkStatus>> statuses = instance.getStatusesByTag(tag);
if (statuses.getValue() == null) return false;
boolean running = false;
for (WorkStatus workStatus : statuses.getValue()) {
running = workStatus.getState() == State.RUNNING | workStatus.getState() == State.ENQUEUED;
}
return running;
}
It will return true
when some of its task is RUNNING
or ENQUEUED
.
public static final String TAG_MY_WORK = "mywork";
if(!isWorkScheduled(TAG_MY_WORK)) { // check if your work is not already scheduled
scheduleWork(TAG_MY_WORK); // schedule your work
}
public static void scheduleWork(String tag) {
PeriodicWorkRequest.Builder photoCheckBuilder =
new PeriodicWorkRequest.Builder(WorkManagerService.class, TIME_INTERVAL_IN_SECONDS,
TimeUnit.SECONDS);
PeriodicWorkRequest photoCheckWork = photoCheckBuilder.build();
WorkManager instance = WorkManager.getInstance();
instance.enqueueUniquePeriodicWork(tag, ExistingPeriodicWorkPolicy.KEEP , photoCheckWork);
}