在 ListView 中显示对象列表

我在 ListView 中显示对象列表时遇到问题，在代码中它没有显示错误，但是当我运行应用程序时，ListView 未显示填充了我在基础中的数据。

AdapterSales.java

public class AdapterVentas extends ArrayAdapter<Ventas> {
    private Activity activity;
    private ArrayList<Ventas> lVenta;
    private static LayoutInflater inflater = null;

    public AdapterVentas (Activity activity, int textViewResourceId,ArrayList<Ventas> lVenta) {
        super(activity, textViewResourceId, lVenta);
        try {
            this.activity = activity;
            this.lVenta = lVenta;

            inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        } catch (Exception e) {

        }
    }

    public int getCount() {
        return lVenta.size();
    }

    public Ventas getItem(Ventas position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public static class ViewHolder {
        public TextView display_name;
        public TextView display_number;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        final ViewHolder holder;
        try {
            if (convertView == null) {
                vi = inflater.inflate(R.layout.layout_list_ventas, null);

                holder = new ViewHolder();
                holder.display_name = (TextView) vi.findViewById(R.id.display_name);
                holder.display_number = (TextView) vi.findViewById(R.id.display_number);

                vi.setTag(holder);
            } else {
                holder = (ViewHolder) vi.getTag();
            }

            holder.display_name.setText(lVenta.get(position).getHora_cierre());
            holder.display_number.setText(lVenta.get(position).getFecha_cierre());
        } catch (Exception e) {

        }
        return vi;
    }
}

layout_sales_list.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/display_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Name" />
    <TextView
        android:id="@+id/display_number"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="HomeTown" />
</RelativeLayout>

活动销售.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="56dp"
    android:paddingLeft="24dp"
    android:paddingRight="24dp">

    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <EditText android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="Código"/>
        <EditText android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="Descripción"/>
        <EditText android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="Proveedor"/>
    </LinearLayout>

    <Button
        android:id="@+id/btnFiltrar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Filtrar" />

    <Button
        android:id="@+id/btnAgregar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Agregar" />

    <ListView
        android:id="@+id/listVentas"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>
</LinearLayout>

销售活动.java

我打电话给我的适配器并通过列表

AdapterVentas adbVenta;
ArrayList<Ventas> myListItems  = new ArrayList<Ventas>();

adbVenta= new AdapterVentas (this, 0, myListItems);
listVentas.setAdapter(adbVenta);