如何使用DownloadManager在Android中停止文件下载？ [英] How to stop the file download in android by using DownloadManager?

问题描述

当我从 Gridview 并获得项目的位置。

我点击下载按钮将下载该项目。 / p>

当我使用 downloadManager 时，如何停止项目下载？

代码是下载按钮，如下所示：

  FileNode file = mFileList.get（temp_position）; //获取我从Gridview 
 
中选择的项目final String filename = file.mName.substring（file.mName.lastIndexOf（/）+ 1）; 
 final String urlString =http：//+ mIp + file.mName; 
 
 String serviceString = Context.DOWNLOAD_SERVICE; 
 DownloadManager downloadManager; 
 downloadManager =（DownloadManager）getActivity（）。getSystemService（
 serviceString）; 
 
 Uri uri = Uri.parse（urlString）; 
 DownloadManager.Request request = new Request（uri）; 
 request.setTitle（filename）; 
 request.setDescription（urlString）; 
 
 String ext = filename.substring（filename.lastIndexOf（。）+ 1）
 .toLowerCase（Locale.US）; 
 String mimeType = MimeTypeMap.getSingleton（）
 .getMimeTypeFromExtension（ext）; 
 
 Log.i（MIME，ext +==&+ mimeType）; 
 
 if（mimeType！= null）{
 request.setMimeType（mimeType）; 
} 
 request.allowScanningByMediaScanner（）; 
 
 request.setNotificationVisibility（Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED）; 
 
 request.setDestinationInExternalPublicDir（MainActivity.sAppName，filename）; 
 
 downloadManager.enqueue（request）; 
  

文件下载时如何停止项目下载？

解决方案

DownloadManager＃enqueue 返回代表<$ c的 long $ c> id 下载发生。将 long 保存在变量中。

然后，如果您需要取消下载，请致电 DownloadManager＃remove（） 传递那么久。

例如

  //开始下载
 long id = downloadManager.enqueue ）; 
 
 //停止下载
 downloadManager.remove（id）; 
  

I　read the file from the SD card , and show on the Gridview.

When I select the item from Gridview and get the position of item.

I click the download button it will download the item.

How to Stop the item download when I using the downloadManager ?

The code is download button is like the following:

FileNode file = mFileList.get(temp_position) ;//Get the item I have select from Gridview

                                final String filename = file.mName.substring(file.mName.lastIndexOf("/") + 1) ;
                                final String urlString = "http://" + mIp + file.mName ;

                                String serviceString = Context.DOWNLOAD_SERVICE ;
                                DownloadManager downloadManager ;
                                downloadManager = (DownloadManager) getActivity().getSystemService(
                                        serviceString) ;

                                Uri uri = Uri.parse(urlString) ;
                                DownloadManager.Request request = new Request(uri) ;
                                request.setTitle(filename) ;
                                request.setDescription(urlString) ;

                                String ext = filename.substring(filename.lastIndexOf(".") + 1)
                                        .toLowerCase(Locale.US) ;
                                String mimeType = MimeTypeMap.getSingleton()
                                        .getMimeTypeFromExtension(ext) ;

                                Log.i("MIME", ext + "  ==>  " + mimeType) ;

                                if (mimeType != null) {
                                    request.setMimeType(mimeType) ;
                                }
                                request.allowScanningByMediaScanner() ;

                                request.setNotificationVisibility(Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED) ;

                                request.setDestinationInExternalPublicDir(MainActivity.sAppName, filename) ;

                                downloadManager.enqueue(request) ;

How to Stop the item download when the file is downloading ?

解决方案

DownloadManager#enqueue returns a long representing the id of the download taking place. Save that long in a variable.

Then, if you need to cancel the download, call DownloadManager#remove() passing in that long.

Eg

//start a download
long id = downloadManager.enqueue(request);

//stop a download
downloadManager.remove(id);

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