Files are "best" managed in a file system. Files systems can be made remotely available through file shares. Your use case appears to preclude the use of these. That's unfortunate, because it's probably your easiest option. OK, so you need another way of getting files from your central location where the files are stored to the client application. Yes, you could put them into the database. As you say, it's not ideal but it's an option. You'll need a lot of storage, depending on the files' sizes, but that's just disk space that you'd need anyway. Retrieving big chunks of data will make queries [a bit] slower but, technically, it's not that big a challenge. Another, and better, alternative might be to have some other piece of software to make your centrally-stored files available to your "remote" application. That would be a Web Server. Even if you're only operating on an internal network, this is the best tool for the job. It's scalable, securable and easily operated and - bonus - it acts as a "stepping stone" towards moving your application to the web.

If the app does not disallow backup in it's AndroidManifest.xml then you should able to retrieve the data using adb backup. Some older apps make use of key/value storage which is not included in backup by default. To include this data change the adb backup command to: adb backup -keyvalue -f oilchangesBackup.ab com.cooly.OilChangeSchedulePro Just make sure to use the correct packageName of the app because if you make a typo the backup file will be empty.

Please note that this does not check that the file is uploaded; merely that the file has been inserted in the field (put differently, you're not testing your app as much as your browser). A better way would be to actually upload the document (add it to the field and click the Upload button or whatever it is that triggers your upload), then verify information that your application displays after the upload, or by re-downloading the file if your application lets you do that.

Is it possible to find and copy the hidden additional files? Using app or maybe with the help of PC using certain software I can? yes, if your device has previously unlocked bootloader and Magisk installed, you can read/check size of /data/user/0/com.oup.elt.dicts.bilingual/files otherwise connect your phone via adb, create backup and extract it (see linked questions) adb backup com.oup.elt.dicts.bilingual

This is not a threat. If you google filename it shows up on androidhost and scribd which is highly likely to be created by some app for its functioning and not a malware script.

The https://en.wikipedia.org/wiki/Media_Transfer_Protocol used between phone and PC does not support editing. MTP is a very simple protocol that allows only listing files/folders including properties, download a file from the phone, upload a file to the phone and delete a file/folder. Additionally while one operation is ongoing no other operation can be performed. Originally MTP was designed for very simple devices like early photo cameras without much CPU or RAM. As editing is not supported you can only simulate it by downloading the file to the PC, edit and and then upload it back to the phone. The download part is integrated into Windows, but the upload part seems to be missing. Also important (but Windows specific) is that MTP devices are shown in the Windows Explorer but can not be accessed by applications by a path like F:\. Therefore the Open With menu is totally different.

https://ghisler.ch/board/viewtopic.php?t=42775 After breaking my head for an hour figured it out and it turns out to be quite simple!(see source) From my call recorder files in mp3 format, I picked up two records and changed the file name to conceal identity/number in the file name . I wanted to convert them to jpg files with only the first five letters in file name. That is nonsense name 914850098765678902345.mp3 → nonse.jpg abracadabra 2021-09-24 14.19.44_O_P330.mp3 → abrac.jpg All you need to do is to enter [N1-5] in the name mask, which means retain first five characters in the file name and enter the desired extension. Nothing else. Click START! and you are done! Here are the changes in the folder for these two files You can also undo the changes by selecting the changed files, going to Multi-rename tool and ... → undo last operation. If you need to do these operations frequently, from the 3 dots options save as a profile and use that profile to save yourself the bother of setting it up again.

Disconnecting and reconnecting the drive fixed the problem.

I think it's just a sloppy turn of the phrase by the book authors. Clearly, if you don't do raw I/O (which, as you say, few modern databases do), you have limited control over how your records are placed on disk. DBMSes minimise the effect of potential fragmentation of database files by the operating system using these methods: Space preallocation. Many DBMSes can be configured to request space allocation in chunks (terminology differs, but they are often referred to as "extents") much larger than the atomic I/O units ("pages" or "blocks"), thus reducing the scale of database file fragmentation. Data file placement. Using the mechanism often called "tablespaces", or simply data file directories, one can place tables for which space allocation characteristics are deemed critical onto separate file systems, where they would be able to grow without interference from other processes. I/O buffers. This is by far the most useful and important method. A well-tuned database would rarely wait for a synchronous I/O operation to read data from disk; all the data pages it needs would be available in memory, often in less fragmented form, by means of the file system cache and/or database buffer pool. Often they employ separate threads that "prefetch" or "read-ahead" the data file blocks before they are actually needed for query processing. See also https://en.wikipedia.org/wiki/File_system_fragmentation#Mitigation on Wikipedia.

The best experience would be to have the system automatically categorize the elements, which is much closer to your design A. If something goes wrong, they could adjust the defaults in the same way you show above. In a similar design with a past project, I observed users dragging all their files at once in a bulk motion, most of the time. So adding complexity to include multiple drop zones may confuse users more. As @maxathousand pointed out. In design A it's not clear if those pill shapes are mutually exclusive or not. You might want to change the affordance to something like a select control with a list where only 1 can be selected once they chose from the list. The concern I have with B, is that I don't see where the user can view the files they have uploaded in order to validate one item in cat 1 vs cat 2. Would they have to memorize them? or copy and paste the lists in other text software?

You'll want to figure out if your users are expecting to search or browse and design accordingly. If a user knows a document exists and is likely to be the one they need, they are in "search-mode". Any interface you can build that facilitates finding a specific document as quickly as possible will be useful. It could be search boxes for file name, filters for extensions, putting user created folders at the top of a list, or it could be making a category for recently uploaded or previously used files. On the other hand, if your user might not know what their options are or if any of the docs meet their needs, they are in "browse-mode". This kind of interface should facilitate looking at many documents quickly to see if any of them are the right one because the user may or may not know what to search for. Even if they do, they won't know if they have the right doc if they've never seen it before or don't remember it. This interface would want fast document previews, a larger table with more metadata on each file, or suggestions of likely matches. There are differences between these two approaches, but also a lot of overlap. Most interfaces try to split the difference and allow users to browse and search, but the result can be a more complicated UI than is required. Even if you have a mix of both use cases, you should try to pick one to prioritize. Scrolling to the end of a long file list and using the file at the end is probably fine for a browsing user, but very annoying for a searching user.

The positioning in the text files has already been written in the commentary - https://ru.stackoverflow.com/users/182825/ant ♪ Anyway, your challenges. fseek They're putting a position in the file just at the beginning or the end, and it's going to be all right here https://msdn.microsoft.com/ru-ru/library/75yw9bf3.aspx : Properly searching 0 relative to any origin) In addition to one challenge:fseek(file, 8, SEEK_END); You're trying to get out of the file, 8 bytes further than it ends. This is not prohibited in principle (see above). https://msdn.microsoft.com/ru-ru/library/75yw9bf3.aspx but empty places will be filled with zeros. Is that exactly what you want to behave?if (file == NULL) { fclose(file); Don't close. not open file. That's what it says. https://msdn.microsoft.com/ru-ru/library/fxfsw25t.aspx :Fclose's function is closing the stream. If the stream parameter is NULL, the inadmissible parameter shall be produced as described in the parameter verification section. If performance can continue, fclose sets errno in EINVAL and returns EOF. It is recommended that the stream indicator be always checked before the function is challenged. file = fopen(filename, "w"); fclose(file); file = fopen(filename, "r"); Here you create an empty file and open it for reading. What can I read? file = fopen(filename, "w"); fclose(file); file = fopen(filename, "r+"); There's an empty file here, then it opens for recording and reading. But it's a challenge to make-- file = fopen(filename, "w+"); (See. https://msdn.microsoft.com/ru-ru/library/yeby3zcb.aspx )

https://docs.oracle.com/javase/9/docs/api/java/util/StringTokenizer.html by your symbol/) https://docs.oracle.com/javase/9/docs/api/java/io/LineNumberReader.html We'll load all the lines in. https://docs.oracle.com/javase/9/docs/api/java/util/List.html We're changing the contents of the collection to your fans.We're downloading data from the collection. list.stream.forEach(string -> ...I'm writing it down. https://docs.oracle.com/javase/9/docs/api/java/io/FileWriter.html Hmm.

Problem solved. Amended code:static void Main(string[] args) { StreamReader sr = new System.IO.StreamReader("G:\\subtraction.txt"); string str; var numbers = new List<string>(); while ((str = sr.ReadLine()) != null) { numbers.Add(str); } foreach (var k in numbers) { Console.WriteLine(k); } Console.ReadLine(); }

Why just, if it's hard to... ♪vector<int> v; int i; . . . while(file >> i) { v.push_back(i); } If the file is open out for recording:bool wasNeg = false; int i; while(file >> i) { if (!wasNeg && i < 0) { wasNeg = true; continue; } out << i << " "; } And... Don't do that.while (!file.eof()) This test will only work after failed Reading. Better like this:while(file.getline(...))

Data in the file:FileWriter fileWriter = new FileWriter("SimpleTextFile.txt", false); fileWriter.write("Example text"); fileWriter.close(); Class design above FileWriter Type:FileWriter(String fileName, boolean append) Its parameters:fileName - The way to the file;append - flag if truedata signed in the file if false ♪ Recording♪If it's a file. SimpleTextFile.txt No, it'll be created.Reading data from the file:try { BufferedReader bufferedReader = new BufferedReader(new FileReader("SimpleTextFile.txt")); StringBuilder stringBuilder = new StringBuilder(); String currentLine; while ((currentLine = bufferedReader.readLine()) != null) { stringBuilder.append(currentLine + "\n"); } bufferedReader.close(); String text = stringBuilder.toString().trim(); } catch (FileNotFoundException exception) { System.out.println("File not found!"); } The text contained in the file will be in a variable text♪If it's a file. SimpleTextFile.txt No, there will be an exception. FileNotFoundException♪

Open the file on reading and writing FileMode :=2;Remind your position in the file. Use it. FPos := Filepos(f)To edit what you need AByteBack with help. Seek(f, FPos) this position BlockWrite(f, AByte, 17);

Better use StringBuilder♪ System.lineSeparator() or System.getProperty("line.separator") depending on the DS, the symbol you need. StringBuilder sb = new StringBuilder(); for(String s : arr){ sb.append(s).append(System.lineSeparator()); } System.out.println(sb.toString()); byte[] b = sb.toString().getBytes(); out.write(b); out.close(); UPDLook what a symbol you don't have. The next code will allow us to know the symbol code and what it looks like. byte[] bytes = FileUtils.readFileToByteArray(file); for(int i =0; i< bytes.length ; i++){ System.out.println("As the bytem value: "+ bytes[i]);//as the numeric byte value System.out.println("Converted as char to printiong to the screen: "+ String.valueOf((char)bytes[i])); }

json.dumps() returns the text that can be retained in the file: import pathlib pathlib.Path("путь").write_text(text, encoding="utf-8") or directly https://docs.python.org/3/library/json.html#json.dump :import json with open("путь", "w", encoding="utf-8") as file: json.dump(data, file)

Problem solved by the accentuation of the list to the file and the files of the entire list. import java.io.*; import java.util.ArrayList; public class Main { public static void main(String args[]) throws IOException, ClassNotFoundException { ArrayList<Human> arrayList = new ArrayList<>(); Human human = new Human("Artyom",12); Human human2 = new Human ("Art",17); FileOutputStream fos = new FileOutputStream("temp.txt"); ObjectOutputStream oos = new ObjectOutputStream(fos); arrayList.add(human); arrayList.add(human2); oos.writeObject(arrayList); oos.flush(); oos.close(); FileInputStream fis = new FileInputStream("temp.txt"); ObjectInputStream oin = new ObjectInputStream(fis); ArrayList<Human> arrayList2 = new ArrayList<>(); arrayList2 = (ArrayList<Human>) oin.readObject(); for(int i = 0 ; i< arrayList2.size() ;i++) { System.out.println("Name:" + arrayList2.get(i).getName() + "Year:" + arrayList2.get(i).getYear()); } } } class Human implements Serializable { private String name; private int year; public Human(String s1, int y1) { this.name = s1; this.year = y1; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getYear() { return year; } public void setYear(int year) { this.year = year; } }