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检查是否已安排WorkManager

android-workmanager android

4

Khemraj Sharma · 技术社区 · 7 年前

我怎么检查 WorkManager 已安排。

这是我的代码,时间表 工作经理 .

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);
    }
}

我打电话 scheduleWork() 在里面 onCreate() 我的 Application 班级。即使我可以检查我的服务是否正在运行 this method . 但我不希望调度WorkManager在调度时间内消除不一致。

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if(!workManagerIsScheduled())
   {
     scheduleWork();
   }

有什么解决办法吗?

3 回复 | 直到 6 年前

1

31

Khemraj Sharma 6 年前

enqueueUniquePeriodicWork()

 workmanager.enqueueUniquePeriodicWork(TAG, ExistingPeriodicWorkPolicy.KEEP , photoCheckWork);

choose between ExistingPeriodicWorkPolicy.KEEP ExistingPeriodicWorkPolicy.REPLACE

`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;
}

true RUNNING 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);
}

2

Irfan 6 年前

Check Release Notes

private boolean isWorkScheduled(List<WorkInfo> workInfos) {

    boolean running = false;

    if (workInfos == null || workInfos.size() == 0) return false;

    for (WorkInfo workStatus : workInfos) {
        running = workStatus.getState() == WorkInfo.State.RUNNING | workStatus.getState() == WorkInfo.State.ENQUEUED;
    }

    return running;
}

3

2

David Sucharda 6 年前

public static boolean isWorkScheduled(String tag) {
    SynchronousWorkManager instance = WorkManager.getInstance().synchronous();
    List<WorkStatus> statuses = instance.getStatusesByTagSync(tag);
    if (statuses.isEmpty()) return false;
    boolean running = false;
    for (WorkStatus workStatus : statuses) {
        running = workStatus.getState() == State.RUNNING
                | workStatus.getState() == State.ENQUEUED;
    }
    return running;
}

here