Android TextView comes up null in SimpleCursorAdapter_问答_开发者

I'm using a SimpleCursorAdapter and for some reason sometimes the findViewById method returns null to some of the TextViews. The id's correspond to the XML Layout widgets. Any ideas as to why?
This is the OrderList.java where I have the SimpleCursorAdapter:
package com.orderdelivery;


import java.util.ArrayList;

 import android.app.Activity;
 import android.app.ListActivity;
 import android.app.ProgressDialog;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.view.ContextMenu;
 import android.view.LayoutInflater;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.view.View.OnLongClickListener;
 import android.widget.AdapterView;
 import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ArrayAdapter;
 import android.widget.CursorAdapter;
 import android.widget.ListView;
 import android.widget.SimpleCursorAdapter;
 import android.widget.TextView;
 import com.orderdelivery.DataAdapter;

 public class Orde开发者_高级运维rList extends ListActivity {
private ListView list;
ArrayList<Order> orders;
OrderListAdapter oAdapter;
SimpleOrderAdapter oCursorAdapter;
private Runnable viewOrders;
private ProgressDialog progress=null;
private DataAdapter dbAdapter;
private int[] views;
private String[] columns;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {



    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    list = getListView();
    //  list.setAdapter(oCursorAdapter);
    list.setOnItemClickListener(new OnItemClickListener(){

        public void onItemClick(AdapterView<?> arg0, View arg1, int   arg2,long arg3) 
        {
            Cursor cursor = (Cursor) list.getItemAtPosition(arg2);
            Intent intent = new    Intent("com.orderdelivery.GROCERYITEMLIST");
            Bundle bundle = new Bundle();
            intent.putExtra("order_id", cursor.getString(cursor.getColumnIndex("order_id")));


            startActivity(intent);
            // TODO Auto-generated method stub
        }
        }
    );

    registerForContextMenu(getListView());

      list.setOnLongClickListener(new OnLongClickListener(){

            public boolean onLongClick(View v) {
                // TODO Auto-generated method stub

                return false;
            }});

    //        orders = new ArrayList<Order>();
    //        
    //        for(int i =0; i<5;i++){
    //          orders.add(new Order("19995","Pueblo, Maya",i,"Pending", null, null, null)); //Customer, items, confirmation...
    //        }
    //        
    //        oAdapter = new OrderListAdapter(this,R.layout.row,orders);
    //        list.setAdapter(oAdapter);
    //       
    dbAdapter = new DataAdapter(this);
    dbAdapter.open();
    dbAdapter.deleteAll();

    columns = new String[] {"order_id","retailer_name","qty","status"};
    views = new int[]{R.id.orderNumber,R.id.location,R.id.quantity,R.id.status};


    oCursorAdapter = new SimpleOrderAdapter(this,R.layout.row,dbAdapter.getAllOrders(),columns,views);
    list.setAdapter(oCursorAdapter);

    // Cursor oCursor = dbAdapter.getAllOrders();


        viewOrders = new Runnable(){

            public void run() {
                // TODO Auto-generated method stub
                updateData();
                runOnUiThread(returnRes);
            }

        };

        Thread thread = new Thread(viewOrders,"getOrderThread");
        progress = ProgressDialog.show(this,"Please wait...","Retrieving assigned orders...", true);
        thread.start();


}

private Runnable returnRes = new Runnable(){

    public void run() {
        // TODO Auto-generated method stub
        oCursorAdapter.changeCursorAndColumns(dbAdapter.getAllOrders(), columns, views);

        oCursorAdapter.notifyDataSetChanged();

        progress.dismiss();
    }

};


private void updateData(){


    dbAdapter.addOrder("1995", "Pending", "100101", 12, 31, "Pueblo,Xtra", "Mayaguez" , 1);
    dbAdapter.addOrder("1991", "Pending", "100102", 12, 31, "Pueblo,Xtra", "Mayaguez" , 1);
    dbAdapter.addOrder("1993", "Pending", "100103", 12, 31, "Pueblo,Xtra", "Mayaguez" , 1);
    dbAdapter.addCustomer("1995", "Robert Soler", "Urb. Villa Mofongo II3", "PR", "Mayaguez", "00617", "787-391-5555", "787-391-5555");
    dbAdapter.addCustomer("1991", "Robert Soler", "Urb. Villa Mofongo II3", "PR", "Mayaguez", "00617", "787-391-5555", "787-391-5555");
    dbAdapter.addCustomer("1993", "Robert Soler", "Urb. Villa Mofongo II3", "PR", "Mayaguez", "00617", "787-391-5555", "787-391-5555");
    dbAdapter.addItem("0101", "Habichuelas Blancas", "1995", "Si es GOYA tiene que ser bueno", 1, "Goya", 0, 2.75, "1001019");
    dbAdapter.addItem("0102", "Honey Nut Cheerios", "1995", "Cereal Cheerios", 5, "General Mills", 0, 3.99, "10019876");
    dbAdapter.addItem("0111", "Habichuelas Rosadas", "1995", "Si es GOYA tiene que ser bueno", 1, "Goya", 0, 2.75, "1001019");
    dbAdapter.addItem("0112", "Arroz Rico", "1995", "Rico", 5, "Bien, Bien Rico", 0, 3.99, "10019876");
    dbAdapter.addItem("0121", "Habichuelas Blancas", "1991", "Si es GOYA tiene que ser bueno", 1, "Goya", 0, 2.75, "1001019");
    dbAdapter.addItem("0122", "Honey Nut Cheerios", "1991", "Cereal Cheerios", 5, "General Mills", 0, 3.99, "10019876");
    dbAdapter.addItem("0131", "Habichuelas Blancas", "1993", "Si es GOYA tiene que ser bueno", 1, "Goya", 0, 2.75, "1001019");
    dbAdapter.addItem("0132", "Honey Nut Cheerios", "1993", "Cereal Cheerios", 5, "General Mills", 0, 3.99, "10019876");



}






private class OrderListAdapter extends ArrayAdapter<Order> {

    private ArrayList<Order> orders;

    private OrderListAdapter(Context context, int textViewResourceId, ArrayList<Order> orders)
    {
        super(context, textViewResourceId, orders);
        this.orders = orders;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        View v = convertView;
        if (v==null)
        {
            LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.row, null);
        }

        Order o = orders.get(position);
        if(o!=null){

            TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
            TextView location = (TextView) v.findViewById(R.id.location);
            TextView quantity = (TextView) v.findViewById(R.id.quantity);
            TextView status = (TextView) v.findViewById(R.id.status);

            if(orderNum!=null){
                orderNum.setText("Order " + o.getOrderNumber());
            }

            if(location!=null)
            {
                location.setText("Location: "+o.getOrderRetailer());
            }

            if(quantity!=null){
                quantity.setText("Qty: "+o.getTotalQuantity());

            }

            if(status!=null){
                status.setText("Status: "+ o.getStatus());
            }

        }

        return v;
    }
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);

    Intent intent = new Intent("com.orderdelivery.GROCERYITEMLIST");

    Bundle bundle = new Bundle();

    bundle.putInt("position", position);


}

//Might be needed
public static Order getOrderAtPosition(int pos){

    return null;

}
public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
    // TODO Auto-generated method stub
    super.onCreateContextMenu(menu, v, menuInfo);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.item_menu, menu);   
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    // TODO Auto-generated method stub

    //Como obtener el item de la lista a desplegar!!!
    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();

    //test
    switch (item.getItemId()){

    case R.id.itemMenu_details:

        Intent in = new Intent("com.orderdelivery.GROCERYORDERDETAILS");
        Bundle bund = new Bundle();
        /*
        this.listCursorAdapter.getCursor().moveToFirst();
        int position =     this.listCursorAdapter.getCursor().getColumnIndex(DataAdapter.ITEM_KEY_ORDER_ID);
        String orderId =    this.listCursorAdapter.getCursor().getString(position);
        */

        String orderId =   "1995";//this.listCursorAdapter.getCursor().getString(2);

        bund.putString("order_id", orderId);
        in.putExtras(bund);
        startActivity(in);

        return super.onContextItemSelected(item);
    }
    return super.onContextItemSelected(item);
}    

private class SimpleOrderAdapter extends SimpleCursorAdapter {

    private LayoutInflater inflater;

    public SimpleOrderAdapter(Context context, int layout, Cursor c,
            String[] from, int[] to) {
        super(context, layout, c, from, to);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void bindView(View v, Context context, Cursor c) {
        // TODO Auto-generated method stub
        super.bindView(v, context, c);
        TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
        TextView location = (TextView) v.findViewById(R.id.location);
        TextView quantity = (TextView) v.findViewById(R.id.quantity);
        TextView status = (TextView) v.findViewById(R.id.status);

        String orderNumString="Order "+ c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_ORDER_ID));
        String    locationString=c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_RETAILER));
        int qty = c.getInt(c.getColumnIndex(DataAdapter.ORDER_KEY_QTY));

        String statusString =      c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_STATUS));

        orderNum.setText(orderNumString);
        location.setText(locationString);
        quantity.setText(""+qty); //FIXXX
        status.setText(statusString);
    }

    @Override
    public View newView(Context context, Cursor c, ViewGroup parent) {
        // TODO Auto-generated method stub

        final LayoutInflater inflater = LayoutInflater.from(context);

        View v = inflater.inflate(R.layout.row, parent, false);


        TextView orderNum = (TextView) v.findViewById(R.id.orderNumber);
        TextView location = (TextView) v.findViewById(R.id.location);
        TextView quantity = (TextView) v.findViewById(R.id.quantity);
        TextView status = (TextView) v.findViewById(R.id.status);

        String orderNumString="Order "+     c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_ORDER_ID));
        String locationString="Location:        "+c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_RETAILER));
        String qtyString ="Qty: "+     c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_QTY));
        String statusString = c.getString(c.getColumnIndex(DataAdapter.ORDER_KEY_STATUS));

        orderNum.setText(orderNumString);
        location.setText(locationString);
        quantity.setText(qtyString);
        status.setText(statusString);
        return v;



    }




    }
}