public class HugeRecyclerView extends RecyclerView {

    public HugeRecyclerView(Context context) {
        super(context);
        init(null, 0);
    }

    public HugeRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(attrs, 0);
    }

    public HugeRecyclerView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(attrs, defStyle);
    }

    private void init(AttributeSet attrs, int defStyle) {
        // Load attributes
    }
}

public class SampleDataApi {

    public static List<SampleModel> getData() {
        // do your consume work here
        SystemClock.sleep(2000);

        return mock();
    }

    private static List<SampleModel> mock() {
        List<SampleModel> list = new ArrayList<>();
        for (int i = 'A'; i <= 'Z'; i++) {
            SampleModel model = new SampleModel("" + (char) i);
            list.add(model);
        }

        return list;
    }
}

public class SampleModel {
    public String mTitle;

    SampleModel(String title) {
        mTitle = title;
    }
}

public class SamplePresenter {
    private static final String TAG = "SecondPresenter";
    private ISampleListener mListener;
    // rx
    private CompositeDisposable compositeDisposable = new CompositeDisposable();

    public void setListener(ISampleListener listener) {
        mListener = listener;
    }

    public void getData() {
        Log.d(TAG, "getData");
        // load start notify
        if (mListener != null) {
            mListener.OnLoadStart();
        }
        // load data
        Disposable dispose = Observable.fromCallable(SampleDataApi::getData)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(data -> {
                            Log.d(TAG, "getData Success" + StringUtils.join(data.toArray(), ","));
                            if (mListener != null) {
                                mListener.OnLoadSuccess(data);
                            }
                        },
                        error -> {
                            Log.w(TAG, "getData error:", error);
                            if (mListener != null) {
                                mListener.OnLoadFail(error.toString());
                            }
                        });

        compositeDisposable.add(dispose);
    }

    public void destroy() {
        // to avoid okhttp leak
        if (compositeDisposable != null && !compositeDisposable.isDisposed()) {
            compositeDisposable.dispose();
        }
    }


}

   public class SampleRecyclerAdapter extends RecyclerView.Adapter {
    private Context mContext;

    // model data
    protected List<SampleModel> mItemList;

    public SampleRecyclerAdapter(Context context) {
        mContext = context;
        mItemList = new ArrayList<>();
    }

    public void setData(List<SampleModel> data) {
        mItemList.clear();
        mItemList.addAll(data);
        notifyDataSetChanged();
    }

    public void addData(List<SampleModel> data) {
        int len = mItemList.size();
        mItemList.addAll(data);
        notifyItemChanged(len);
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ItemViewHolder(LayoutInflater.from(mContext)
                .inflate(R.layout.recycler_item, parent, false));
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        ((ItemViewHolder) holder).hint.setText(mItemList.get(position).mTitle);
    }

    @Override
    public int getItemCount() {
        return mItemList == null ? 0 : mItemList.size();
    }

    class ItemViewHolder extends RecyclerView.ViewHolder {
        private TextView hint;

        ItemViewHolder(View view) {
            super(view);
            hint = (TextView) view.findViewById(R.id.tv_content);
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_hint"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="@dimen/text_size_medium" />

    <com.open.hugerecyclerview.HugeRecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/tv_content"
        android:layout_width="match_parent"
        android:layout_height="@dimen/recycler_item_first_h"
        android:gravity="center" />
</FrameLayout>

public class SimpleRecyclerActivity extends BaseActivity implements ISampleListener {
    private SamplePresenter mPresenter;
    private TextView mHint;

    private SampleRecyclerAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void initData() {
        mPresenter = new SamplePresenter();
        mPresenter.setListener(this);
    }

    @Override
    protected void initView(Bundle savedInstanceState) {
        setContentView(R.layout.activity_simple);

        RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        LinearLayoutManager lm = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(lm);
        mAdapter = new SampleRecyclerAdapter(this);
        mRecyclerView.setAdapter(mAdapter);

        mHint = (TextView) findViewById(R.id.tv_hint);
    }

    @Override
    protected void loadData() {
        mPresenter.getData();
    }

    @Override
    public void OnLoadStart() {
        mHint.setText(getString(R.string.load_start));
    }

    @Override
    public void OnLoadSuccess(List<SampleModel> data) {
        mHint.setText(getString(R.string.load_success));
        mAdapter.setData(data);
    }

    @Override
    public void OnLoadFail(String error) {
        mHint.setText(getString(R.string.load_fail) + error);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mPresenter.destroy();
    }
}