如何通过使用Android的下载管理器，保存在SD卡上的文件？
问题描述：
我面对我的应用程序拖的问题。
I am facing tow issues in my app.
我使用的是Android 下载管理器下载网上文件，但它下载到系统目录中的所有文件1说下载通过使用目录
1- I am using Android DownloadManager to download online files but it downloads all files to system directories say Download directory by using
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_PICTURES, "fileName");
现在我想将文件下载到我自己的目录说新建文件夹。这怎么可能实现。请帮我在这方面，我会非常感激。
Now I want to download the file to my own directory say "New Folder". How is it possible to implement. Please help me in this respect, I would be very thankful.
2 - 我如何检查是否SD卡可用？
2- How can I check that whether SD card is available or not?
答
用这样的方式：在这里Dhaval_files是我的文件夹名称
use this way: Here Dhaval_files is my folder name
public void file_download(String uRl) {
File direct = new File(Environment.getExternalStorageDirectory()
+ "/dhaval_files");
if (!direct.exists()) {
direct.mkdirs();
}
DownloadManager mgr = (DownloadManager) this.getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse(uRl);
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI
| DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false).setTitle("Demo")
.setDescription("Something useful. No, really.")
.setDestinationInExternalPublicDir("/dhaval_files", "test.jpg");
mgr.enqueue(request);
}