java - 如何取消downloadManager启动的下载任务

Question

我已经为下载进度栏完成了这段代码，但如果用户不小心单击了按钮，我也想取消该下载任务。我无法实现这个目标。任何人都可以帮助我解决这个问题。

提示:我是 android java 新手，因此请用所有详细答案进行解释。提前致谢..

String url = "URL";
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setDescription("Some descrition");
            request.setTitle("Some title");

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
                request.allowScanningByMediaScanner();
                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            }
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "PDF_demo.ext");

            DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
            if (manager != null) {
                long downloadID = manager.enqueue(request);

            }

Answer 1

来自the document ，尝试使用:

DownloadManager.remove(downloadID)