We Keep Coding

How to create a hidden folder i.e .MyFolder [(dot)MyFolder] in DCIM directory (Scoped Storage) Android Q

I want to create a hidden folder i.e .MyFolder [(dot)MyFolder] in DCIM directory. Here is my code:-
final String relativeLocation = Environment.DIRECTORY_DCIM+File.separator+".MyFolder/images";
ContentValues contentValues = new ContentValues();
contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME,positionOfPager+".jpeg");
contentValues.put(MediaStore.MediaColumns.MIME_TYPE,"image/*");
contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH,relativeLocation);
imageUri = context.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,contentValues);
fos = (FileOutputStream) context.getContentResolver().openOutputStream(Objects.requireNonNull(imageUri));
inImage.compress(Bitmap.CompressFormat.JPEG,100,fos);
The problem here is that a folder is create with Hyphen symbol "_.MyFolder" i.e.[(Hypen)(dot)MyFolder] due to which the folder is not hidden. My app is creating lots of images which i dont want to show up in gallery to bother the user. Please help me out
Note:- I am implementing the code for scoped storage android 11

File file = new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), ".MyFolder/images");
if ( ! file.existst() )
if ( !file.mkdirs() )
return;
Both on 10 and 11 you can use this code.
You can also create your files in this folder using classic file system paths.
No need for MediaStore. Worse: As soon as you use the MediaStore the MediaStore knows about your files and hence Gallery apps that use the MediaStore to list files.
For an Android Q device add android:requestLegacyExternalStorage="true" to application tag in manifest file.
But.... this hidden folder stuff will not prevent the media scanner to scan your files after some time. Also a .nomedia file will often not do now adays.

I am stuck in renaming image before uploading to server in android

I am try to get image from gallery and upload to server... Before upload I need to change its name to a unique name... I am doing in this way but the name is not changing here. Kindly help me
chooseFiledestination= new File(getPath(selectedImage));
Toast.makeText(getApplicationContext(),chooseFiledestination+" This is Whole Path",Toast.LENGTH_LONG).show();
String fileName = chooseFiledestination.getName();
Toast.makeText(getApplicationContext(),fileName+" This is File name",Toast.LENGTH_LONG).show();
File newFile = new File("mehdi.jpg");
chooseFiledestination.renameTo(newFile);
Toast.makeText(getApplicationContext(),chooseFiledestination+" After Rename",Toast.LENGTH_LONG).show();

Android File not being copied to SD card

I'm trying to copy a file that is located in the External storage directory into a directory that is in my SD Card. However, when I check to see if the file has successfully been copied, the file is not even created in the SD Card.
Am I missing something? Here is the code I have:
String sourcePath = Environment.getExternalStorageDirectory().getPath() + newFileName;
File source = new File(Environment.getExternalStorageDirectory().getPath(), newFileName);
String destinationPath = "/storage/external_SD";
File destination = new File(destinationPath, newFileName);
try {
if(!destination.exists()){
destination.mkdir();
}
FileUtils.copyFile(source, destination);
} catch (IOException e) {
e.printStackTrace();
}
The copyFile method is from an Apache library. Here is the link for it: https://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/FileUtils.html

However, when I check to see if the file has successfully been copied, the file is not even created in the sd Card.
You do not have arbitrary filesystem-level access to removable storage on Android 4.4+.
Is there a work around for this?
That depends on what your objective is.
If you insist that you must be able to write to that specific path on arbitrary user devices... then, no, there is no supported workaround. After all, there is no /storage/external_SD on the vast majority of Android devices. Where and how device manufacturers choose to mount removable media is up to them and is an implementation detail that will vary.
If you relax that restriction, but insist that you must be able to write a file to the root directory of removable storage on arbitrary user devices... then, no, there is no supported workaround today. The N Developer Preview has a "Scoped Directory Access" feature that should allow this, but it will be several years before you can assume that an arbitrary user device will be running that version of Android or higher. Also, you do not get actual filesystem access, but rather a Uri (see the Storage Access Framework option, below).
Now, if you are more flexible about the precise location, you have other options:
You can use getExternalFilesDirs(), getExternalCacheDirs(), and getExternalMediaDirs(), all methods on Context. Note the plural form. If those return 2+ entries, the second and subsequent ones are locations on removable storage that you can read from and write to, no permissions required. However, you do not get to choose the exact path. And if the device has 2+ removable storage volumes, I'm not quite certain how you would help the user tell them apart.
You can use the Storage Access Framework and let the user choose where to put the file. The user is welcome to choose removable storage... or not. You get a Uri back, which you can use with ContentResolver and openOutputStream() to write your content. You can also take persistable Uri permissions so you can work with that file again in the future, assuming the user doesn't move or delete it behind your back.

If you want to copy to external storage then you need
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

The destinationPath you mentioned may not be accessible as it may belong to the private system folders or some other application folders. You can however use public folders like Pictures,Music, Videos,Downloads,etc. or create sub folders inside them -
String sourcePath = Environment.getExternalStorageDirectory().getPath() + newFileName;
File source = new File(Environment.getExternalStorageDirectory().getPath(), newFileName);
File destinationPath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS, "/external_SD");
try {
if(!destinationPath.exists()){
destinationPath.mkdir();
}
File destination = new File(destinationPath, newFileName);
FileUtils.copyFile(source, destination);
} catch (IOException e) {
e.printStackTrace();
}

Amazon Kindle Fire HD Saving Files onto MicroSD Cards

Before It gets brought up about my question already being asked, I would like to state that I have tried around 5 other options and possible solutions with no result.
Here is a snippet of my code. This is just a snippet. Upon testing the results of my code currently, a file is being saved in the main directory, /ScoutingApp. However, I would like to files to save in a folder /ScoutingApp/ on the MicroSD card so I can eject data more quickly.
if (Environment.MEDIA_MOUNTED.equals(state)) {
File root = Environment.getExternalStorageDirectory();
File Dir = new File(root.getAbsolutePath() + "/ScoutingApp");
if (!Dir.exists()) {
Dir.mkdir();
} else {
filename = UUID.randomUUID().toString() + ".sql";
File file = new File(Dir, filename);

If the Android that your Fire OS is based on is Android 4.4+, you can try getExternalFilesDirs() on any Context (such as an Activity). Note the plural form — if this method returns 2+ items, the second and subsequent ones are on removable storage. Those locations will be specific for your app, and you can read from and write to those locations without permissions.
Note, though, that Fire OS is not completely compliant with the Play ecosystem's compatibility requirements, and so YMMV.

Error when writing to Android sdcard

I am trying to open an output stream and write it into my device.
Whenever I try to open an output stream with the path I have on the sd card, I get a
java.io.FileNotFoundException.
But I am able to open the same file path when I try to open it with the device internal storage.
I have given the permission in manifest file to write into sd card.
Below are two file paths
In Device internal storage
/data/data/test.android/cache/9b77fb19-0c1a-441a-8a00-a762898a6648,workspace:/SpacesStore/c3c5f8f8-2dab-443d-8914-5dbfe499054e;1.0
In SD card
/storage/sdcard0/Android/data/test.android/cache/9b77fb19-0c1a-441a-8a00-a762898a6648,workspace:/SpacesStore/c3c5f8f8-2dab-443d-8914-5dbfe499054e;1.0
As you can see, everything after 'cache/' is the same.
Below is the file writing code
String path = downloadedDirectory + File.separator + document.getRepositoryId() + FILENAME_SEPARATOR+ document.getId();
//downloaded directoy is the directory what user selects either sd card or app internal storage. Document repository id and document id i get from my backend.
//should not be of any issue here.
File file= new File(path);
randomAccessFile = new RandomAccessFile(file, "rw");
I am getting exception while trying to create the random access file.
cheers,
Saurav