getDownloadByContentId
全部标签 收到第一个结果后如何移除观察者?以下是我尝试过的两种代码方式,但即使我删除了观察者,它们都会继续接收更新。Observerobserver=newObserver(){@OverridepublicvoidonChanged(@NullableDownloadItemdownloadItem){if(downloadItem!=null){DownloadManager.this.downloadManagerListener.onDownloadManagerFailed(null,"thisitemalreadyexists");return;}startDownload();mo
收到第一个结果后如何移除观察者?以下是我尝试过的两种代码方式,但即使我删除了观察者,它们都会继续接收更新。Observerobserver=newObserver(){@OverridepublicvoidonChanged(@NullableDownloadItemdownloadItem){if(downloadItem!=null){DownloadManager.this.downloadManagerListener.onDownloadManagerFailed(null,"thisitemalreadyexists");return;}startDownload();mo