Question

在我的Android应用程序中，我有一个类扫描DynamoDB表并在ListView中返回结果。

CatalogActivity.java：

public class ListViewAdapter extends BaseAdapter {

Context mContext;
LayoutInflater inflater;
private List<Product> result = null;
private ArrayList<Product> arraylist;

public ListViewAdapter(Context context, List<Product> result) {
    mContext = context;
    this.result = result;
    inflater = LayoutInflater.from(mContext);
    this.arraylist = new ArrayList<Product>();
    this.arraylist.addAll(result);
}

public class ViewHolder {
    TextView itemName;
    TextView itemPrice;
    ImageView itemImage;
}

// Other required methods...

@Override
public View getView(final int position, View view, ViewGroup viewGroup) {
    final ViewHolder holder;
    if (view == null) {
        holder = new ViewHolder();
        view = inflater.inflate(R.layout.lv_items, null);

        holder.itemName = (TextView) view.findViewById(R.id.itemNameList);
        holder.itemPrice = (TextView) view.findViewById(R.id.itemPriceList);
        holder.itemImage = (ImageView) view.findViewById(R.id.itemImageList);
        view.setTag(holder);
    } else {
        holder = (ViewHolder) view.getTag();
    }

    holder.itemName.setText(result.get(position).getName());
    holder.itemPrice.setText(Integer.toString(result.get(position).getPrice()) + "$");
    productId = result.get(position).getProductId();
    productSale = result.get(position).getSale();
    productSummary = result.get(position).getSummary();

ListViewAdapter.java：

CatalogActivity

如您所见，ListViewAdapter扫描DynamoDB表并返回结果，方法是将结果发送到ListViewAdapter。 onPreExecute获取结果，并以预定义的单元格布局将它们输入到ListView中。

问题是什么？在CatalogActivity onPostExecute方法中，我设置了要显示的进度对话框。在<meta http-equiv="Content-Type" content="text/html; charset=utf-8">方法中，我已经驳回了此对话框。问题是几秒钟后对话框被解除，但ListView单元格仅在大约一半或整分钟后显示。

有没有办法加快扫描速度并更快地应用细胞？

加速DynamoDBScanExpression搜索

0 个答案: