I have a question about ArrayAdapter.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent" >
    <TextView
      android:id="@+id/name"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Name" />
   <TextView
      android:id="@+id/email"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Email" />
</LinearLayout>

public class CardAdapter extends ArrayAdapter<Card> {
    public CardAdapter(Context context, ArrayList<Card> cards) {
       super(context, 0, cards);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       // Import data (items) located in position from an array
       Card card = getItem(position);    
       // Check the contents of the item for reuse of the picture convertView
       // If it is null, make a new one, and if it is not null, reuse it.
       if (convertView == null) {
          convertView = LayoutInflater.from(getContext()).inflate(R.layout.item, parent, false);
       }
       // Find the view to which you want to apply the contents of the Card in the ConvertView
       TextView name = (TextView) convertView.findViewById(R.id.name);
       TextView email = (TextView) convertView.findViewById(R.id.email);
       // Specify a value for the view.
       name.setText(card.name);
       email.setText(card.email);
       // Return the completed view (to be displayed on the screen). )
       return convertView;
   }
}