Develop Reference

Create a folder like WhatsApp Images, WhatsApp Videos in Albums or Gallery

My requirement is to show directory under Gallery/ Albums,
creating a directory in the following way does not full fill my requirement...
File rootPath = new File(Environment.getExternalStorageDirectory(), "directoryName");
if(!rootPath.exists()) {
rootPath.mkdirs();
}
final File localFile = new File(rootPath,fileName);
by using this code i can see the folder by using "file mangaer" with the path...
"deviceStorage/directoryName" but the folder is not visible under Gallery or Albums
for directory creation i tried the following ways too...
1)File directory = new File(this.getFilesDir()+File.separator+"directoryName");
2)File directory = new File (Environment.getExternalFilesDir(null) + "/directoryName/");
3)File directory = new File(Environment.
getExternalStoragePublicDirectory(
(Environment.DIRECTORY_PICTURES).toString() + "/directoryName");
but no luck, please help me friends
thanks in advance.

check this solution as well:
String path = Environment.getExternalStorageDirectory().toString();
File dir = new File(path, "/appname/media/app images/");
if (!dir.isDirectory()) {
dir.mkdirs();
}
File file = new File(dir, filename + ".jpg");
String imagePath = file.getAbsolutePath();
//scan the image so show up in album
MediaScannerConnection.scanFile(this,
new String[] { imagePath }, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
if(Config.LOG_DEBUG_ENABLED) {
Log.d(Config.LOGTAG, "scanned : " + path);
}
}
});

Try this one.
File root = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + "albums");
boolean rootCreated = false;
if (!root.exists())
rootCreated = root.mkdir();

You can use MediaStore API to save your media files like that:
val values = ContentValues().apply {
put(MediaStore.Images.Media.DISPLAY_NAME, "filename")
put(MediaStore.Images.Media.RELATIVE_PATH, "${Environment.DIRECTORY_DCIM}/$directoryName")
put(MediaStore.Images.Media.MIME_TYPE, mimeType)
}
val collection = MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val item = context.contentResolver.insert(collection, values) ?: throw IOException("Insert failed")
resolver.openFileDescriptor(item, "w", null)?.use {
writeImage(it.fileDescriptor)
}
This will save the media files to the media collections and make it available to the gallery. Gallery app normally shows your directoryName as an album.
Checked on Samsungs S10 and above with Android 10.

heres the java.nio library way to create directory
Java Code
File targetFile = new File(Environment.getExternalStorageDirectory(), "subDir");
Path sourceFile = Paths.get(targetFile.getAbsolutePath());
Files.createDirectory(sourceFile);

some android phone create .nomedia file inside the created app folder to prevent media from being shown in gallery app so you may check if this hidden file exists and delete it if it exists. set folder and files readable. you may wait quite time before system reflect your created file in your gallery app.
val parentFile = File(Environment.getExternalStorageDirectory(), "MyAppFolder")
if(!parentFile.exists())
parentFile.mkdir()
parentFile.setReadable(true)
// .nomedia file prevents media from being shown in gallery app
var nomedia = File(parentFile, ".nomedia")
if(nomedia.exists()){
nomedia.delete()
}
val file = File(parentFile , "myvideo.mp4")
file.setReadable(true)
input.use { input ->
var output: FileOutputStream? = null
try {
output = FileOutputStream(file)
val buffer = ByteArray(4 * 1024)
var read: Int = input.read(buffer)
while (read != -1) {
output.write(buffer)
read = input.read(buffer)
}
output.flush()
// file written to memory
} catch (ex: Exception) {
ex.printStackTrace()
} finally {
output?.close()
}
}

Validate Excel file is downloaded in Selenium Web driver Java

I'm able to download excel file by clicking Download button which comes under DOM ,
after that i want verify downloaded file is same one.
AUTO IT is not allowed in project.
I have tried below code for verification on local but if i will push this code to repo.
then user path will get change and code will fail.
`String filepath = "C:User\\Dhananjay\\Downloads";
String fileName = "report.xlsx"
File targetFile = new File(fileName,filePath);
if(! targetFile.exists())'
{
system.out.println("File is verified")`
}else{
system.out.println("file not downloaded")
}'

String userProfile = System.getProperty("user.home"); returns %USERPROFILE% variable.
So you can use String filepath = System.getProperty("user.home") + "\\Downloads";
Works even on Linux.

I have found way to validate on local path and it's generic one
File folder = new File(System.getProperty("user.home") +\\Downloads);
File[] listOfFiles = folder.listFiles();
boolean found = false;
File f = null;
for (File listOfFile : listOfFiles) {
if (listOfFile.isFile()) {
String fileName = listOfFile.getName();
System.out.println("File " + listOfFile.getName());
if (fileName.matches("5MB.zip")) {
f = new File(fileName);
found = true;
}
}
}
Assert.assertTrue("Downloaded document is not found",found );
f.deleteOnExit();

Is there a way to save to the gallery instead of the SD card?

I have this code here.
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdCard.getAbsolutePath() + "/dir1/dir2");
dir.mkdirs();
File file = new File(dir, "GIFName_" + System.currentTimeMillis() +".gif");
try{
FileOutputStream f = new FileOutputStream(file);
f.write(generateGIF(list));
}catch(Exception e){
e.printStackTrace();
}
my app basically converts images to .GIFS, and right now it saves it on the sd card, but I want to save it to gallery. Is there any way to do this easily? I know you can do it for images, but can you for .GIFS that are created?

Create folder in internal memory like this
File mydir = context.getDir("mydir", Context.MODE_PRIVATE);
File fileWithinMyDir = new File(mydir, "myfile");
FileOutputStream f = new FileOutputStream(fileWithinMyDir);
And than while saving file in the folder,give path to this directory.
Hope it helps!

how to delete the same file which is uploaded in a directory?

there is folder temp to which the files uploaded by users are stored. the file name is same for each user but the content is different. Each user uploads a file called abc.xlsx. now when "A" user uploads abc.xlsx file after processing that file should be deleted. But currently i am deleting all the files in the folder. which is a problem since one more user might be uploading the file ehich will be cleared too. So i was thinking of renaming the file by appending the username to the file and then delete that particular file.
This is the file upload:
ProcessForm uploadForm = (ProcessForm)form;
String folderpath = "servers/temp";
String filePath = folderpath + "/" + uploadForm.getUploadedFile().getFileName();
This will delete all the files in the folder:
String tempPath = folderpath;
File file = new File(tempPath);
File[] files = file.listFiles();
for (File f:files)
{
if (f.isFile() && f.exists())
{
f.delete();
}
}

I think i got it. This is working as expected:
String folderpath = "servers/temp";
String filePath = folderpath + "/" + "abc_"+user.getUsername()+".xlsx";
outputStream = new FileOutputStream(new File(filePath));
outputStream.write(uploadForm.getUploadedFile().getFileData());
Code to delete file:
File file = new File(filePath);
boolean fileDelete = file.delete();
if (fileDelete)
{
mLogger.debug("successfully deleted");
} else {
mLogger.error("cant delete a file");
}

Android App using opencv: how to save an image without overwriting?

I'm using the following code to save an image to a folder when I select an option:
File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String filename = "teste.png";
File file = new File(path, filename);
filename = file.toString();
Highgui.imwrite(filename, mRgba);
But i'd like the saved image to NOT OVERWRITE the image that's already in the folder. How could I do that? Using a kind of index for each image or something like that, I think, but how?
Thanks.

Maybe something like this?
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyAppDir");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.e(TAG, "failed to create directory");
return null;
}
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "testimage_" + timeStamp + ".png");