Exibindo dados em um RecyclerView

ArrayList<Author> authors = dbHandler. getAllAuthors();
recyclerView.setHasFixedSize(true);

// ListView
recyclerView.setLayoutManager(new LinearLayoutManager(youractivity.this));


// create an Object for Adapter
CardViewDataAdapter1  mAdapter = new CardViewDataAdapter1(authors);

// set the adapter object to the Recyclerview
recyclerView.setAdapter(mAdapter);

 class CardViewDataAdapter1 extends RecyclerView.Adapter<CardViewDataAdapter1.ViewHolder> {
   private ArrayList<Author> dataSet;


public CardViewDataAdapter1(ArrayList<Author> os_versions) {

    dataSet = os_versions;
}


@Override
public CardViewDataAdapter1.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
  // create a new view
    View itemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
            R.layout.recycler_item, null);

    itemLayoutView.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT));

    // create ViewHolder

    CardViewDataAdapter1.ViewHolder viewHolder = new CardViewDataAdapter1.ViewHolder(itemLayoutView);

    return viewHolder;
}

@Override
public void onBindViewHolder(CardViewDataAdapter1.ViewHolder viewHolder, int i) {

    Author fp = dataSet.get(i);

    viewHolder.tv_name.setText(fp.getName());




    viewHolder.menu = fp;
}

@Override
public int getItemCount() {

    return dataSet.size();
}

public void updateList(List<Author> temp) {
    dataSet = (ArrayList<Author>) temp;
    notifyDataSetChanged();
}

// inner class to hold a reference to each item of RecyclerView
public  class ViewHolder extends RecyclerView.ViewHolder {

    public TextView tv_name;


    public Author menu;
    public ViewHolder(View itemLayoutView) {
        super(itemLayoutView);

        tv_name = (TextView) itemLayoutView  .findViewById(R.id.tv_name);


       }

   }
 }

<?xml version="1.0" encoding="utf-8"?>
   <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:card_view="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  card_view:cardCornerRadius="5dp"
 card_view:cardBackgroundColor="#FFFFFF"
    card_view:cardUseCompatPadding="true"
   >
<LinearLayout
  android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="vertical">
    <TextView
        android:id="@+id/tv_name"
        android:layout_width="match_parent"
         android:layout_height="wrap_content"
        android:text="Enamul"/>

 </LinearLayout>

</android.support.v7.widget.CardView>