Question

有一个列表视图，使用适配器从数据库中选择数据在这里，我想反向加载项目，当我执行查询时，从第一行中选择数据，并将其放在列表视图中的第一项中，依此类推。

如何选择数据库中的最后一项，并将其放在第一，第二列表视图中。第9项第8项第7项第6项项目第4项第3项第2项第1项第0项

@覆盖 public View getView（int position，View convertView，ViewGroup parent）{

ViewHolder holder = null;
ViewHolder holder2 = null;
int itemType = getItemViewType(position);


        Bitmap bitmap = BitmapFactory.decodeByteArray(advertising.getImage(), 0, advertising.getImage().length);

        holder.advIdTxt.setText(advertising.getId() + "");
        holder.advTitleTxt.setText(advertising.getTitle());
        holder.advDescriptionTxt.setText(advertising.getDescription());
        holder.advDiscountTxt.setText(advertising.getDiscount() + " % " + "Sale" + "");
        holder.advPriceTxt.setText(advertising.getPrice() + " $" + "");
        holder.advCatNameTxt.setText(advertising.getCategory().getName());
        holder.advImage.setImageBitmap(bitmap);
        holder.advFdateTxt.setText(formatter.format(advertising.getFromDate()));
        holder.advTdateTxt.setText(tormatter.format(advertising.getToDate()));
        convertView.setTag(holder);

    }
    else {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.dumpy, null);
        holder2 = new ViewHolder();
        holder2.z = (TextView) convertView.findViewById(R.id.z);
        convertView.setTag(holder2);
    }

//}

return convertView;
}

在此输入代码

Answer 1

从数据库中获取数据时，按照desc。

的顺序给出相应的列

例如

sql = "SELECT * FROM "+Database.tblname+" WHERE  ORDER BY "+Database.clcolumnid+"  ASC"; 
SQLiteDatabase sqlite = dbObject.getWritableDatabase();
    Cursor cursor = sqlite.rawQuery(sql, null);

获取要列出视图的要素项

1 个答案: