如何在android中获取包含图片的目录列表

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

private ArrayList<String> getImageDirectories() {
    ArrayList<String> directories = new ArrayList<>();
    String[] projection = {MediaStore.Images.Media.DATA};
    String orderBy = MediaStore.Images.Media.DATE_TAKEN + " DESC";
    Cursor cursor = getContentResolver().query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            projection,
            null,
            null,
            orderBy);

    if (cursor != null) {
        int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        while (cursor.moveToNext()) {
            String imagePath = cursor.getString(columnIndex);
            File imageFile = new File(imagePath);
            String directoryPath = imageFile.getParent();
            if (!directories.contains(directoryPath)) {
                directories.add(directoryPath);
            }
        }
        cursor.close();
    }

    return directories;
}

ArrayList<String> imageDirectories = getImageDirectories();