I am developing an app that fetches the file from file manager. When file is accessed from
DCIM/Camera folder and moved into another place programmatically. This leaves and empty placeholder in the gallery. If these placeholders are not deleted, then if the file is moved again into DCIM/Camera it shows the file in gallery. If that placeholder is deleted, and file is moved again into DCIM/Camera the file is not shown on Gallery. I searched the answer for this question but all of those answers are in Java. But I am developing my app in flutter.
suggest me a solution in Flutter/dart.
This was the only one answer I found but in Java Android file delete leaves empty placeholder in Gallery
Thanks in advance.
Related
I'm a beginner at flutter and dart and had some issues with file handling using flutter.
I'm trying to store data locally in text files for my flutter application, and came across the standard tutorial on flutter's website which used path_provider and dart:io. It had instructions on getting the path and reading and writing to a file, however this didn't seem to work for files I added to the project. The only way to store to files was to first write using the inbuilt functions, then reading this newly created file. I can't add my own file and read it using flutter.
I also can't open the file created by flutter as I don't know where its stored. The path given by getApplicationDocumentsDirectory() returns the path /data/user/0/com.example.daily_challenges/app_flutter, and I don't know where to find this in my project.
In summary: How do I read a pre-existing file and how do I view the file created automatically by flutter.
Thanks :)
You can access the files from a physical device or simulator through Device File Explorer in Android Studio. Follow this guide
You won't be able to access getApplicationDocumentsDirectory().
If you are using android device, you can try to store it in getExternalStorageDirectory(). There's no equivalent in IOS though.
If you are running in a physical device. Open Device File Explorer in Android Studio and you can find the file under
data/data/your app package/app_flutter/fileName.txt
For example,
data/data/com.example.file_example/app_flutter/example.txt
And if you want to read the pre-existing file, you not need to anything specific, if you give the same file name, if not exist, it will create one, otherwise it will return the old one.
final File file = File(filePath);
file.writeAsStringSync('${text}', mode: FileMode.append);
For write, you consider using FileMode if you want to append text to the existing file. Or else by default overwrite will happen.
For read, you can consider this
final File file = File(filePath);
String text = await file.readAsString();
Just use Device File Explorer from Android Studio.
But the weird thing, path_provider gives you path like /data/user/0/your_app_id/..., but in fact all files are located in /data/data/your_app_id/..., as mentioned in previous answer.
Hi I am working with Moodle 2.9.1. Here I have a form for upload a question and an answer file. I successfully upload the answer file to a location and inserted the question text and answer file name in database.
Now I want to edit the question, while editing the question the already uploaded file will be shown in the file picker area.
How can I show the uploaded file in filepicker area??
For text editor I can use
$mform->addElement('editor', 'desc', get_string('description'));
$mform->setDefault('desc', array('text'=>$defaulttext));
Please help me..
The filepicker element is used for uploading a single one-off file, that will be processed (and then, usually, discarded). If you are wanting a file that remains part of the Moodle storage and will reappear when you reopen the form, then you should use a filemanager (and restrict to a single file, if needed).
There are details in the Moodle docs about how to use this https://docs.moodle.org/dev/Using_the_File_API_in_Moodle_forms#filemanager (including re-populating the 'draft files' area when you load the form).
Hi I am trying to display a packaged file say .key/.pages/.numbers file to user in a UIWebView but I cant. The keynote file was created using a Keynote app from my iPad recently. I imported that file to my app using UIDocumentMenuViewController from iCloud. I tried to look into the file attributes and it turn out that the file imported is actually a "directory" not single file. Inside, it has some contents. Can anybody tell me how to go from here?
I had the same problem. iWork files are zipped bundles but for some reason importing from iCloud unzips the contents first, whearas copying from the app directly via Open in ... from Number (or Pages or Keynote) works perfectly.
So what you need to do is test if the result of import is a directory, and if so zip the directory into a single file and keep the correct file extension (.number pages or .key).
This seems like a hack but it works and is best workaround I've been able to find
In Swift you can use SSZipArchive as an easy way to zip a directory
In my chrome app, I am using HTML5 file system to save the pdf files to sand box.Downloading is working fine.But how do i access that downloaded file path? I want to give that path as webview source.
The best way, if it works, would be to use a filesystem URL. To get this use FileEntry.toURL
These don't work on external files (i.e. files that come from chrome.fileSystem.chooseEntry and are outside the app's sandbox) but should work for files in the app's sandbox.
Note, I am referring to filesystem:// urls not file://urls, which won't work as Marc Rochkind has pointed out in his answer.
Disclaimer: I haven't tested this, but I believe it should work.
You need to get the contents of the PDF into a data URL. See my answer to this question:
Download external pdf files to chrome packaged app's file system
i want to use the "file sharing" feature in my app. I want to create a photo-app which has no content when the user starts it. Therefore the user can select an image-folder on his mac or pc. After that and starting the app on his iphone or ipad, all the content of his image-folder will be viewable.
I think its only possible to add simple files to my app - not content folders, right?
Any ideas how i could do this?
Thanks for your time and help.
On your mac, rename the folder to folder.pkg.
You can now add folder.pkg to the documents for your app using iTunes File Sharing.
Once folder.pkg has been added, rename it to its original name.
Not sure how to do this with iTunes on a PC.
You cannot upload folder to the app.
one way to do so
create .zip file of that folder and upload.
extract that zip file from app.
checkout this project, It has a code to extract zip file.
https://github.com/ZipArchive/ZipArchive
I found that using iTunes 12, and iOS8, I can now ADD folders to an apps Documents folder using iTunes File Sharing. Previously it was only possible to add single files.
It is indeed possible to add a folder to and App's File Sharing space using iTunes version 12+. However, the iTunes upload button will not work for this, because its file selection interface insists on plain file selection only, excluding folders. The way which works is to drag-and-drop a folder from your PC to the iTunes File Sharing window.
Since the iTunes interface for handling file sharing is very poorly designed, is is worth recalling the tricks that you can use to perform operations on the File Sharing space, that iTunes does not provide a button for:
Rename a file or folder: click it once, wait for a couple of seconds, and click it again. This will replace the name with the renaming edit box
Delete a file or folder: select it, then hit the "Del" key on your keyboard
Upload a folder: drag-and-drop it from your computer copy
It remains impossible to directly see or alter the contents of a File Sharing folder in iTunes. My workaround for doing this is the following:
Download the folder to the computer
Make any desired change to the folder tree on the computer copy
Delete the File Sharing copy of the folder (or, optionally, rename it to something like folder.old for safety)
Upload the modified folder from the computer, using drag-and-drop
(optionally) Delete the safety copy in File Sharing, after verifying that the App works fine with the newly uploaded version of the folder
I hope this helps
I was not able to drag-and-drop a folder from my PC (Windows 10). But I found a free application called iFunbox that allowed me to copy a folder to an application's documents.