How to setEmptyView to RecyclerView - tutorial (http://alexzh.com/tutorials/how-to-setemptyview-to-recyclerview/)

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.alexzh.recyclerviewsetemptyview.EmptyRecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <TextView
        android:id="@+id/empty_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Add more notes"
        android:textSize="36sp" />

</RelativeLayout>

EmptyRecyclerView.java

package com.alexzh.recyclerviewsetemptyview;

import android.content.Context;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.View;

public class EmptyRecyclerView extends RecyclerView {
    private View mEmptyView;

    public EmptyRecyclerView(Context context) {
        super(context);
    }

    public EmptyRecyclerView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public EmptyRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    private void initEmptyView() {
        if (mEmptyView != null) {
            mEmptyView.setVisibility(
                    getAdapter() == null || getAdapter().getItemCount() == 0 ? VISIBLE : GONE);
            EmptyRecyclerView.this.setVisibility(
                    getAdapter() == null || getAdapter().getItemCount() == 0 ? GONE : VISIBLE);
        }
    }

    final AdapterDataObserver observer = new AdapterDataObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            initEmptyView();
        }

        @Override
        public void onItemRangeInserted(int positionStart, int itemCount) {
            super.onItemRangeInserted(positionStart, itemCount);
            initEmptyView();
        }

        @Override
        public void onItemRangeRemoved(int positionStart, int itemCount) {
            super.onItemRangeRemoved(positionStart, itemCount);
            initEmptyView();
        }
    };

    @Override
    public void setAdapter(Adapter adapter) {
        Adapter oldAdapter = getAdapter();
        super.setAdapter(adapter);

        if (oldAdapter != null) {
            oldAdapter.unregisterAdapterDataObserver(observer);
        }

        if (adapter != null) {
            adapter.registerAdapterDataObserver(observer);
        }
    }

    public void setEmptyView(View view) {
        this.mEmptyView = view;
        initEmptyView();
    }
}

item_note.xml

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

    <TextView
        android:id="@+id/title_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="12dp"
        android:layout_marginRight="12dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="24sp"/>

</FrameLayout>

MainActivity.java

package com.alexzh.recyclerviewsetemptyview;

import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private final static int DELAY = 3000;

    private Handler mHandler;
    private NotesAdapter mAdapter;

    private Runnable updateAdapterRunnable = new Runnable() {
        @Override
        public void run() {
            mAdapter.setNotes(getTmpNotes());
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mAdapter = new NotesAdapter();

        EmptyRecyclerView recyclerView = (EmptyRecyclerView) findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setEmptyView(findViewById(R.id.empty_view));
        recyclerView.setAdapter(mAdapter);

        mHandler = new Handler();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mHandler.postDelayed(updateAdapterRunnable, DELAY);
    }

    @Override
    protected void onPause() {
        super.onPause();
        mHandler.removeCallbacks(updateAdapterRunnable);
    }

    private static List<Note> getTmpNotes() {
        final List<Note> list = new ArrayList<>();
        list.add(new Note("1st note"));
        list.add(new Note("2nd note"));
        list.add(new Note("3rd note"));
        list.add(new Note("4th note"));
        list.add(new Note("5th note"));
        list.add(new Note("6th note"));
        list.add(new Note("7th note"));
        list.add(new Note("8th note"));
        list.add(new Note("9th note"));
        list.add(new Note("10th note"));
        list.add(new Note("11th note"));
        list.add(new Note("12th note"));
        list.add(new Note("13th note"));
        list.add(new Note("15th note"));
        return list;
    }
}

Note.java

package com.alexzh.recyclerviewsetemptyview;

public class Note {
    private String mTitle;

    public Note(String title) {
        this.mTitle = title;
    }

    public String getTitle() {
        return mTitle;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Note note = (Note) o;

        return mTitle != null ? mTitle.equals(note.mTitle) : note.mTitle == null;
    }

    @Override
    public int hashCode() {
        return mTitle != null ? mTitle.hashCode() : 0;
    }

    @Override
    public String toString() {
        return "Note{" +
                "title='" + mTitle + '\'' +
                '}';
    }
}

NotesAdapter.java

package com.alexzh.recyclerviewsetemptyview;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.List;

public class NotesAdapter extends EmptyRecyclerView.Adapter<NoteViewHolder> {
    private List<Note> mNotes;

    public void setNotes(List<Note> notes) {
        this.mNotes = notes;
        notifyDataSetChanged();
    }

    @Override
    public NoteViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_note, parent, false);

        return new NoteViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(NoteViewHolder holder, int position) {
        holder.mTitleTextView.setText(mNotes.get(position).getTitle());
    }

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

NoteViewHolder.java

package com.alexzh.recyclerviewsetemptyview;

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;

class NoteViewHolder extends RecyclerView.ViewHolder {

    protected TextView mTitleTextView;

    NoteViewHolder(View itemView) {
        super(itemView);
        mTitleTextView = (TextView) itemView.findViewById(R.id.title_text_view);
    }
}

What happens when you have a SwipeRefreshView? The textview doesn't show up