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android - 如何设置 WorkManager 在后台上传

问题描述

我如何使用workmanager进行后台上传工作，我有通过FTP将我的文件备份到电脑的应用程序，我想学习新方法，因为在我的手机上，旧方法只有在我启动并运行应用程序时才有效我关闭应用程序后台任务停止。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
}

}

标签： androidkotlinintentserviceandroid-workmanager

解决方案

两种解决方案：

  1. 使用带有 IntentService 的警报管理器来定期安排任务，即使应用程序在后台，如下所示：

    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. 使用工作管理器并定期安排它，如下所示：

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

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