@Override
 public void onShow() {
   if (mDoctors == null
       || mDoctors.size() <= 0
       || SettingsUtils.getDoctorUpdateRequired(mActivity)) {
     if (mTask != null) mTask.cancel(true);
     mTask = new AllDoctorsAsyncTask(this.getActivity(), mHandler);
     mActivity.showLoader(null, null, true);
     mTask.execute();
   } else if (mRecyclerAdapter != null) {
     mRecyclerAdapter.addAll(mDoctors);
     mRecyclerAdapter.notifyDataSetChanged();
   }
 }
        @Override
        public void handleMessage(Message msg) {
          super.handleMessage(msg);
          mActivity.hideLoader();
          if (msg.getData().containsKey(RecentDoctorsAsyncTask.SUCCESS_DATA)) {
            Object[] objects =
                (Object[]) msg.getData().getSerializable(RecentDoctorsAsyncTask.SUCCESS_DATA);
            Doctor[] doctors = Arrays.copyOf(objects, objects.length, Doctor[].class);
            mDoctors = new ArrayList<Doctor>(Arrays.asList(doctors));
            Collections.sort(
                mDoctors,
                new Comparator<Doctor>() {
                  @Override
                  public int compare(Doctor doctor, Doctor t1) {
                    return doctor.getDisplayName().compareToIgnoreCase(t1.getDisplayName());
                  }
                });
            if (mRecyclerAdapter != null) {
              mRecyclerAdapter.addAll(mDoctors);
              mRecyclerAdapter.notifyDataSetChanged();
            } else {
              mRecyclerAdapter =
                  new AllDoctorsRecyclerAdapter(AllDoctorsFragment.this.getActivity(), mDoctors);
              mRecyclerAdapter.setEmptyView(mErrorMsg);
              mRecyclerView.setLayoutManager(
                  new LinearLayoutManager(AllDoctorsFragment.this.getActivity()));
              final DividerDecoration divider =
                  new DividerDecoration.Builder(AllDoctorsFragment.this.getActivity())
                      .setHeight(R.dimen.default_divider_height)
                      .setPadding(R.dimen.default_divider_padding)
                      .setColorResource(R.color.default_header_color)
                      .build();

              mRecyclerView.setHasFixedSize(true);
              mRecyclerView.setLayoutManager(
                  new LinearLayoutManager(AllDoctorsFragment.this.getActivity()));
              // mRecyclerView.addItemDecoration(divider);

              decor = new StickyHeaderDecoration(mRecyclerAdapter);
              mRecyclerView.setAdapter(mRecyclerAdapter);
              mRecyclerView.addItemDecoration(decor);
            }
            /*mRecyclerAdapter.setOnLoadMoreListener(mRecyclerView, new BaseAbstractRecyclerAdapter.OnLoadMoreListener() {

                int offset = 0;
                int limit = 100;

                @Override
                public void onLoadMore() {
                    List<Doctor> newDoctors = new DoctorDAO(mActivity).getAlphabetically(limit, offset);
                    offset += limit;
                    mRecyclerAdapter.appendAll(newDoctors);
                }
            });*/
            // mErrorMsg.setVisibility(View.GONE);
            // mRecyclerView.setVisibility(View.VISIBLE);
            if (mErrorMsg instanceof DefaultTextView) {
              ((DefaultTextView) mErrorMsg).setText(getString(R.string.empty_doctors));
            }
          } else if (msg.getData().containsKey(RecentDoctorsAsyncTask.ERROR_DATA)) {
            LOG_TRACER.d(msg.getData().getString(RecentDoctorsAsyncTask.ERROR_DATA));
            if (mErrorMsg instanceof DefaultTextView) {
              ((DefaultTextView) mErrorMsg)
                  .setText(msg.getData().getString(RecentDoctorsAsyncTask.ERROR_DATA));
            }
            // mErrorMsg.setVisibility(View.VISIBLE);
            // mRecyclerView.setVisibility(View.GONE);
          }
        }