Creating and

onCreateLoader.java

@Override
public Loader<List<User>> onCreateLoader(int id, Bundle args) {
    return new AsyncTaskLoader<List<User>>(this) {

        List<User> users;

        @Override
        protected void onStartLoading() {
            super.onStartLoading();
            if (users == null) {
                forceLoad();
            } else {
                deliverResult(users);
            }
        }

        @Override
        public List<User> loadInBackground() {
            try {
                return mGithubService.getUsers().execute().body();
            } catch (IOException e) {
                return null;
            }
        }

        @Override
        public void deliverResult(List<User> data) {
            super.deliverResult(data);
            users = data;
        }
    };
}