LibGDX search for file types in local file system

Question

I'm building a system that allows users to upload files to LibGDX's local directory to play them in the game. How can I search recursively through the local file system for a specific file type and return all returned files?

Answer 1

You could use Files.walk() along with filter(). Thus if you wanted to get all PNG images, then you could do:

Path path = Paths.get(Gdx.files.getLocalStoragePath());

try {
    List<Path> files = Files.walk(path)
        .filter(filePath -> !Files.isDirectory(filePath) && 
                            filePath.toString().toLowerCase().endsWith(".png"))
        .collect(Collectors.toList());
}
catch (IOException ex) {
    ex.printStackTrace();
}

The example starts searching from Gdx.files.getLocalStoragePath() continuously searching all subdirectories for any file ending with .png.

It might be important to include !Files.isDirectory(filePath) as technically someone could name a directory test.png.