android-workmanager - Android Workmanager PeriodicWorkRequest 不是唯一的

Question

对于 OneTimeWorkRequest，我们可以使用 WorkContinuation 来确保如果作业已经安排好了，我们可以保留或替换它。PeriodicWorkRequest 没有这样的选项，因此每次创建我的主要事件时都会创建一个新作业，一段时间后我会收到此异常。

java.lang.IllegalStateException: Apps may not schedule more than 100 distinct jobs

所以我正在尝试以下方法来创建“独特的周期性作品”

public void schedule(){
    Constraints constraints = new Constraints.Builder().setRequiresBatteryNotLow(true).build();
    OneTimeWorkRequest zombieSpawnWorker = new OneTimeWorkRequest.Builder(ZombieSpawnWorker
            .class).setInitialDelay(15, TimeUnit.MINUTES).setConstraints(constraints).addTag(ZombieSpawnWorker.TAG).build();
    this.setUuid(zombieSpawnWorker.getId());
    WorkManager.getInstance().beginUniqueWork(TAG,
                    ExistingWorkPolicy.KEEP,
                    OneTimeWorkRequest.from(ZombieSpawnWorker.class));
}

然后在工作结束时再次调用这个方法

public WorkerResult doWork() {
    try {
        //work to be done
    } catch (Exception e) {
        Log.e(TAG,e.getLocalizedMessage());
        return WorkerResult.FAILURE;
    }
    schedule();
    return WorkerResult.SUCCESS;
}

Answer 1

另一种解决方法是向 PeriodicWorkRequestBuilder 添加标记 REQUEST_TAG，然后在调用之前调用 WorkManager.getInstance().cancelAllWorkByTag(REQUEST_TAG)您将定期请求排入队列。