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Questions tagged [documentfile]

DocumentFile Class represent a document backed by either a DocumentsProvider or a raw file on disk.

This is a utility class designed to emulate the traditional File interface. It offers a simplified view of a tree of documents, but it has substantial overhead. For optimal performance and a richer feature set, use the DocumentsContract methods and constants directly.

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Can I create a DocumentFile with a stored Uri?

I got a Uri using the following method. Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE); startActivityForResult(intent, MY_REQUEST_CODE); like： content://com.android.externalstorage.documents/tree/primary%3A Can I store this string to…
nolizemin
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How to rewrite DocumentFile

I want to let user to pick up folder and my app will make a file in this folder. So I use Intent.ACTION_OPEN_DOCUMENT_TREE. Google says that I need to use DocumentFile instead of File. Previously I used File and want to get the result similar to…
Valgaal
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Why does DocumentFile.getParentFile() return null after it is created with a Uri?

Code: DocumentFile dfNew = dfDirectory.createFile("video/mp4", "foo.mp4"); //dfNew.getParentFile() is NOT null. DocumentFile dfNewCopy = DocumentFile.fromSingleUri(activity, dfNew.getUri()); //dfNewCopy.getParentFile() IS null. Otherwise,…
Hong
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Android: Strange behavior of DocumentFile InputStream

Background I have an application that uses Storage Access Framework. It prompts a user to pick a directory to obtain permissions to work with files: Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE); Then allow user to select a JPG image…
Quark
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Writing with an OutputStream to a DocumentFile: data seem to be written but file ends up empty

The application KDE Connect allows remotely browsing an Android device from a desktop computer through SFTP. Since Android 4.4, developers don't have write permission to SD cards directly through the filesystem anymore. So I am trying to port the…
jeanv
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Explore contents of Uri Folder retrieved from Intent.ACTION_OPEN_DOCUMENT

I want to be able to access the list of files from a DocumentFile, when the user selects a folder instead of a file. I am calling the intent like this: Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); …
pwoolvett
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Android: How to get permanent write permission on removable sd-card?

I went through the Storage Access Framework for the last days and still don't get it. My Question is: How can I create a file with those permissions on the sd-card without beeing prompt to select a patha after selecting the sd-card location once? I…
MSeiz5
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DocumentFile rename latency

In my application I have original file on SD card, I create temporal file on SD card using DocumentFile, write some data there and finaly want to replace original file with temporal one. Using DocumentFile I'm deleting original file with delete()…
Andrey Kolesnikov
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Unable to append bytes at the end of the file in SD card - Lollipop

I am building a downloading manager to download files and save it to my sd card. For API>=23, I have to use FileOutputStream, which help me to resume the file in case downloading fails. However, in API 21 & API 22 (Lollipop), one can't write in Sd…
Ayush Jain
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How to perform basic operations on files using DocumentFile API?

Background Starting from API 21 (Lollipop), apps can get a special "permission" to modify real SD-cards, as shown on previous posts I've written (here and here). The problem I can delete files, and I can also create them, but I can't find a way to…
android developer
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Saving files to SD card on Android Lollipop

Android 5 introduce new API for working with SD-card. If you want to write files into some directory on the SC-card, y need get access to it. As far as I know, it could be done in this way: Intent intent = new…
Maxim Metelskiy
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Android get folder of single DocumentFile (uriForFile)

I have big trouble to get the directory that contains a users picked file. The file contains the information for the directory. So I have to read it and then work with tbe files in that directory. The question is how I get from the DocumentFile…
Oschi
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Can't use DocumentsContract.getDocumentId on uri gotten from ActivityResultContracts.OpenDocumentTree()

From here: https://stackoverflow.com/a/70933975/13519865 if I, private val dirRequest = registerForActivityResult(ActivityResultContracts.OpenDocumentTree()) { uri -> if (uri != null) { DocumentsContract.getDocumentId(uri) } } I…
Cyber Avater
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Android app: Differentiate "folder deleted" from "permission removed" for this folder

In my Android app, the user can select a folder thanks to Intent.ACTION_OPEN_DOCUMENT_TREE I can then write files to this folder. The problem is that the user can delete this folder or remove the permission to access it. In both cases, I would like…
Laurent D.
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opening an external "file explorer" app: how to get absolute path from a uri pointing to a folder

In my app, the user can choose where the created files (text files) are created. This part is working fine. But now, I want to open an external "file explorer" app, pointing directly to the chosen folder. The "file explorer " apps I know accept an…
Laurent D.
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