我正在尝试在我的Service类中使用DownloadManager:DownloadManagerdownloadManager=(DownloadManager)getSystemService(DOWNLOAD_SERVICE);//imageUriisavalidUriRequestdownloadRequest=newRequest(imageUri);//withoutthisline,itworksdownloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);//s

我正在尝试在我的Service类中使用DownloadManager:DownloadManagerdownloadManager=(DownloadManager)getSystemService(DOWNLOAD_SERVICE);//imageUriisavalidUriRequestdownloadRequest=newRequest(imageUri);//withoutthisline,itworksdownloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);//s

我正在尝试使用DownloadManager从我的应用程序下载大型PDF文件。我希望在下载期间以及下载完成时显示通知。但是，设置可见性会导致上述异常。这个错误与这篇文章不同DownloadManager.Request.setNotificationVisibilityfailswithjSecurityException:invalidvalueforvisibility:2另一篇文章在将可见性设置为VISIBILITY_HIDDEN时寻求帮助，您需要在list中获得许可。我正在尝试将可见性设置为DownloadManager.Request.VISIBILITY_VISIBLE_N