DataManager.java 文件源码

public Single<List<Object>> getCategories() {
    return mApiService.forumCategories().flatMap(new Function<ForumCategory, SingleSource<? extends List<Object>>>() {
        @Override public SingleSource<? extends List<Object>> apply(ForumCategory forumCategory) {
            ArrayList<Object> items = new ArrayList<>();
            for (ForumCategory.Categories categories : forumCategory.response.categories) {
                items.add(categories.categoryName);
                for (ForumCategory.Forums forum : categories.forums) {
                    items.add(forum);
                }
            }
            return Single.just(items);
        }
    });
}