是否可以从DocumentFile获取常规文件? [英] Is it possible to get a regular File from DocumentFile?

问题描述

对于Android，以下代码返回一个Uri，该Uri可用于创建与目录相对应的DocumentFile.

For Android, the following code returns a Uri that can be used to create DocumentFile corresponding to a directory.

Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
startActivityForResult(intent, REQUEST_CODE_CUSTOM_FOLDER);

由于库的许多方法都要求参数为java.io.File，所以我想知道是否可以从DocumentFile中获取java.io.File.

Since many methods of a library requires a parameter to be java.io.File, I am wondering if one can get a java.io.File from a DocumentFile.

作为示例，返回的文档树Uri treeUri如下:

As an example, an returned document tree Uri treeUri is the following:

treeUri.getPath():/tree/primary:DCIM/deeper/evendeeper
treeUri.toString(): content://com.android.externalstorage.documents/tree/primary%3ADCIM%2Fdeeper%2Fevendeeper

以下是ADM中显示的目录:

The following is the directory shown in ADM:

推荐答案

以下代码返回一个Uri，该Uri可用于创建与目录相对应的DocumentFile

the following code returns a Uri that can be used to create DocumentFile corresponding to a directory

不，不是.它返回一个Uri，可用于创建与文档树相对应的DocumentFile.不需要它表示文件系统上的目录.表示文档树的位置和方式取决于用户选择的DocumentsProvider.该提供程序可以执行它想要代表树的任何操作(例如，使用数据库，使用对服务器的REST调用).

No, it does not. It returns a Uri that can be used to create a DocumentFile corresponding to a tree of documents. There is no requirement for it to represent a directory on a filesystem. Where and how the document tree is represented is up to the DocumentsProvider that the user chose. That provider can do whatever it wants to represent the tree (e.g., use a database, use REST calls to a server).

我想知道是否可以从DocumentFile中获取java.io.File.

I am wondering if one can get a java.io.File from a DocumentFile.

否，因为没有文件.

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