Android Kotlin: Getting a FileNotFoundException with filename chosen from file picker?

Question

I\'m working on an Android application where one of the features is to let the user choose a file to open (I\'m wanting to open a plain text .txt file). I\'ve worked on And

Answer 1

If you are getting "msf:xxx" in URI, use below solution where I have created temp file in app cache directory and deleted same file after completion of my task:

if (id != null && id.startsWith("msf:")) {
                    final File file = new File(mContext.getCacheDir(), Constant.TEMP_FILE + Objects.requireNonNull(mContext.getContentResolver().getType(imageUri)).split("/")[1]);
                    try (final InputStream inputStream = mContext.getContentResolver().openInputStream(imageUri); OutputStream output = new FileOutputStream(file)) {
                        final byte[] buffer = new byte[4 * 1024]; // or other buffer size
                        int read;

                        while ((read = inputStream.read(buffer)) != -1) {
                            output.write(buffer, 0, read);
                        }

                        output.flush();
                        return file;
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                    return null;
                }

I have fixed this issue and it's working 100% for msf. :)

Also Delete the temp file after the completion of your work:

private void deleteTempFile() {
        final File[] files = requireContext().getCacheDir().listFiles();
        if (files != null) {
            for (final File file : files) {
                if (file.getName().contains(Constant.TEMP_FILE)) {
                    file.delete();
                }
            }
        }
    }

Here TEMP_FILE value is "temp."