Loading arraylist of objects into Android Recycler View, no crash but nothing visible.

//CardDemoActivity
package com.ebookfrenzy.carddemo;

import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.design.widget.CollapsingToolbarLayout;
import android.graphics.Color;

public class CardDemoActivity extends AppCompatActivity {

    RecyclerView recyclerView;
    RecyclerView.LayoutManager layoutManager;
    RecyclerView.Adapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_card_demo);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        CollapsingToolbarLayout collapsingToolbarLayout =
                (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);

        collapsingToolbarLayout.setTitle("");
        collapsingToolbarLayout.setContentScrimColor(Color.GREEN);

        recyclerView =
                (RecyclerView) findViewById(R.id.recycler_view);

        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);

        adapter = new RecyclerAdapter();
        recyclerView.setAdapter(adapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_card_demo, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

}

//RecyclerAdapter

package com.ebookfrenzy.carddemo;

import android.graphics.Color;
import android.os.Build;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;
import android.support.design.widget.Snackbar;

import java.util.ArrayList;

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {


    ArrayList<Employee> list = new ArrayList<>();


    Employee employee1 = new Employee("Pamela Beesly", "Receptionist", R.drawable.pamela_beesly);
    Employee employee2 = new Employee("Andy Bernard", "Sales Director", R.drawable.andy_bernard);
    Employee employee3 = new Employee("Creed Bratton", "Quality Assurance", R.drawable.creed_bratton);
    Employee employee4 = new Employee("Jim Halpert", "Assistant Regional Manager", R.drawable.jim_halpert);
    Employee employee5 = new Employee("Ryan Howard", "Vice President, Northeast", R.drawable.ryan_howard);
    Employee employee6 = new Employee("Stanley Hudson", "Sales Representative", R.drawable.stanley_hudson);
    Employee employee7 = new Employee("Kelly Kapoor", "Customer Service Rep", R.drawable.kelly_kapoor);
    Employee employee8 = new Employee("Phyllis Lapin", "Sales Representative", R.drawable.phyllis_lapin);
    Employee employee9 = new Employee("Kevin Malone", "Accountant", R.drawable.kevin_malone);
    Employee employee10 = new Employee("Angela Martin", "Senior Accountant", R.drawable.angela_martin);
    Employee employee11 = new Employee("Oscar Martinez", "Accountant", R.drawable.oscar_martinez);
    Employee employee12 = new Employee("Meredith Palmer", "Supplier Relations", R.drawable.meredith_palmer);
    Employee employee13 = new Employee("Dwight Schrute", "Assistant Regional Manager", R.drawable.dwight_schrute);
    Employee employee14 = new Employee("Michael Scott", "Regional Manager", R.drawable.michael_scott);
    Employee employee15 = new Employee("Toby Flenderson", "Human Resources Manager", R.drawable.toby_flenderson);

    public void loadData(){

        list.add(employee1);
        list.add(employee2);
        list.add(employee3);
        list.add(employee4);
        list.add(employee5);
        list.add(employee6);
        list.add(employee7);
        list.add(employee8);
        list.add(employee9);
        list.add(employee10);
        list.add(employee11);
        list.add(employee12);
        list.add(employee13);
        list.add(employee14);
        list.add(employee15);

    }

    class ViewHolder extends RecyclerView.ViewHolder {

        public ImageView itemImage;
        public TextView itemTitle;
        public TextView itemDetail;


        public ViewHolder(View itemView) {
            super(itemView);
            loadData();
            itemImage =
                    (ImageView) itemView.findViewById(R.id.item_image);
            itemTitle =
                    (TextView) itemView.findViewById(R.id.item_title);
            itemDetail =
                    (TextView) itemView.findViewById(R.id.item_detail);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int position = getAdapterPosition();
                    Snackbar.make(v, "Employee: " + list.get(position),
                            Snackbar.LENGTH_LONG)
                            .setAction("Action", null).show();


                }
            });

        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext())
                .inflate(R.layout.card_layout, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {
        viewHolder.itemTitle.setText(list.get(i).getEmployeeTitle());
        viewHolder.itemDetail.setText(list.get(i).getEmployeeDetail());
        viewHolder.itemImage.setImageResource(list.get(i).getEmployeePicture());

    }

    @Override
    public int getItemCount() {
        return list.size();
    }

}