如何在android Q及更高版本中将有内容的私有文件夹复制到公共目录？

Uri privateFolderUri = MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY);
String[] projection = {MediaStore.Files.FileColumns._ID, MediaStore.Files.FileColumns.DATA};
String selection = MediaStore.Files.FileColumns.DATA + " LIKE ?";
String[] selectionArgs = new String[]{"/storage/emulated/0/Android/data/com.example.app/files/%"};
String sortOrder = null;

Cursor cursor = getContentResolver().query(privateFolderUri, projection, selection, selectionArgs, sortOrder);

while (cursor.moveToNext()) {
    long fileId = cursor.getLong(cursor.getColumnIndex(MediaStore.Files.FileColumns._ID));
    String filePath = cursor.getString(cursor.getColumnIndex(MediaStore.Files.FileColumns.DATA));

    try {
        InputStream inputStream = new FileInputStream(filePath);
        OutputStream outputStream = getContentResolver().openOutputStream(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, length);
        }

        inputStream.close();
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}