Question

我使用的是WorkManager版本android.arch.work:work-runtime:1.0.0-beta03。我使用此工作管理器使用OneTimeWorker以动态间隔时间将文件上传到服务器。

这就是我的工作。希望您可以检查一下，并告诉我哪里错了，以及其他修复方法。

首先，我提出工作要求

    OneTimeWorkRequest workRequest = new OneTimeWorkRequest.Builder(MyWorkRequest.class)
            .setInitialDelay(0), TimeUnit.SECONDS)
            .addTag("UploadData")
            .build();

    WorkManager
            .getInstance()
            .getWorkInfoByIdLiveData(workRequest.getId())
            .observeForever(workInfoObserverBackground);
    WorkManager
            .getInstance()
            .enqueueUniqueWork("UploadData", ExistingWorkPolicy.REPLACE, workRequest);

然后，定义“观察者”以侦听其结果。我也从这里开始下一次跑步。

workInfoObserverBackground = workInfo -> {
            if (workInfo != null){
                switch (workInfo.getState()) {
                    case SUCCEEDED:
                    case FAILURE:
                        WorkManager.getInstance().getWorkInfoByIdLiveData(workRequest.getId()).removeObserver(workInfoObserverBackground);
                        WorkManager.getInstance().cancelUniqueWork("UploadData");
                        WorkManager.getInstance().cancelAllWorkByTag("UploadData");
                        workRequest = new OneTimeWorkRequest.Builder(MyWorkRequest.class)
                                .setInitialDelay(next_interval_time_received_from_api), TimeUnit.SECONDS)
                                .addTag("UploadData")
                                .build();
                        WorkManager
                                .getInstance()
                                .getWorkInfoByIdLiveData(workRequest.getId())
                                .observeForever(workInfoObserverBackground);
                        WorkManager
                                .getInstance()
                                .enqueueUniqueWork("UploadData", ExistingWorkPolicy.REPLACE, workRequest);
                        break;
                }
            }
        };

几分钟后（我无法记录它，因为它是随机发生的），它崩溃了，这是从logcat收集的堆栈跟踪信息。

1-15 21:46:14.806 25964-26054/com.example.app E/AndroidRuntime: FATAL EXCEPTION: pool-8-thread-1
Process: com.example.app, PID: 25964
android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed. 
at android.database.CursorWindow.<init>(CursorWindow.java:108)
at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
at androidx.work.impl.model.WorkSpecDao_Impl.getInputsFromPrerequisites(WorkSpecDao_Impl.java:1112)
at androidx.work.impl.WorkerWrapper.runWorker(WorkerWrapper.java:171)
at androidx.work.impl.WorkerWrapper.run(WorkerWrapper.java:124)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)

我的间隔时间始终为1秒。也许旧任务挂在下一个任务上而无法销毁？

2048 kb的WorkManager光标窗口分配失败

0 个答案: