android - 如何设置WorkManager在后台上传

Question

我如何使用 workmanager 进行后台上传工作，我有一个应用程序可以通过 FTP 将我的文件备份到电脑上，我想学习新的方法，因为在我的手机上，只有当我有应用程序时，旧的方法才有效并在我关闭应用程序时运行，后台任务停止。谁能帮我设置 workmanager

class Working(context: Context, workerParams: WorkerParameters) : Worker(context, workerParams) {
private val TAG = ""
private val SERVER = ""
private val USERNAME = ""
private val PASSWORD = ""
private val PATH = ""
private val timer = Timer()
override fun doWork(): ListenableWorker.Result {
    Log.i(TAG, "UploadJobService onStartJob")
    UploadFile(applicationContext).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, PATH, SERVER, USERNAME, PASSWORD)
    var uploadTask = UploadFile(applicationContext)
    timer.schedule(UploadTick(uploadTask, applicationContext),0, 1 * 10000)
    return UploadTick.Result.SUCCESS
}
internal class UploadTick(task: UploadFile, ctx: Context): TimerTask() {
    private val SERVER = ""
    private val USERNAME = ""
    private val PASSWORD = ""
    private val PATH = ""

    private var _task = task
    private val _context = ctx

    override fun run() {
        Log.d("UploadTick", _task.status.toString())
        if(_task.status == AsyncTask.Status.PENDING) {
            _task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, PATH, SERVER, USERNAME, PASSWORD)
        } else if(_task.status == AsyncTask.Status.FINISHED) {
            _task = UploadFile(_context)
            _task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, PATH, SERVER, USERNAME, PASSWORD)
        }
    }
}

companion object {

    private val TAG = UploadTick::class.java.simpleName
}

Answer 1

两种解决方案:

1. 使用带有 IntentService 的警报管理器定期安排任务，即使应用程序在后台也是这样:

   final AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
   final Intent i = new Intent(context, UpdateService.class);
   
   if (pendingIntent == null) {
       pendingIntent = PendingIntent.getService(context, 0, i, PendingIntent.FLAG_CANCEL_CURRENT);
   }
       manager.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), INTERVAL_TIME_MILLIS, pendingIntent);
   }
   

2. 使用工作管理器并像这样定期安排它:

   WorkManager.getInstance().enqueue(new 
   PeriodicWorkRequest.Builder(FiveDayDataApiDownloader.class, 24, 
   TimeUnit.HOURS).setConstraints(new 
   Constraints.Builder().setRequiresBatteryNotLow(true).build()).build());