public Uri getUriForFolder(final Folder folder) {
        if (folder == null) {
            return null;
        }
        try {
            return getAccessorFor(folder).getUriForFolder(folder);
        } catch (IOException ioe) {
            //"getUriForFolder" is used in "reportProblem", so calling it here might create a loop-of-death
            //reportProblem(R.string.contentstorage_err_folder_access_failed, ioe, folder);
            Log.v("Problem accessing folder " + folder, ioe);
        }
        return null;
    }
Returns Uri for a folder. Returns null if this folder does not yet exist
main/src/main/java/cgeo/geocaching/storage/ContentStorage.java