Android: Retrieve all image directories

Question

I am trying to find all directories on an Android device that contain images (internal as well as external storage).
Basically, I try to get all the directories that are listed in the native gallery application

So for example:

• All images
• Downloads
• My Favourites
• Whatsapp Pictures
  ...

How does one accomplish this? I think it is related to MediaStorage.Images.Media and so on, but the documentation is not very helpful there and a lot of google searches didn't help as well.

Answer 1

Thanks to @BlazingFire, who did not fully answer my question, but provided some code I could work with and have now my desired result:

public ArrayList<String> getFile(File dir) {
    File listFile[] = dir.listFiles();
    if (listFile != null && listFile.length > 0) {
        for (File file : listFile) {
            if (file.isDirectory()) {
                getFile(file);
            }
            else {
                if (file.getName().endsWith(".png")
                        || file.getName().endsWith(".jpg")
                        || file.getName().endsWith(".jpeg")
                        || file.getName().endsWith(".gif")
                        || file.getName().endsWith(".bmp")
                        || file.getName().endsWith(".webp"))
                {
                    String temp = file.getPath().substring(0, file.getPath().lastIndexOf('/'));
                    if (!fileList.contains(temp))
                        fileList.add(temp);
                }
            }
        }
    }
    return fileList;
}

It only adds parent directories of images and only if they have not yet been added. I also included .bmp and .webp as valid image file extensions