我正在尝试为我的Android应用中的商店元素创建一个自定义适配器,但每次我向下滚动列表时图像似乎都会改变它们的位置,我已经在这里看了一下但是我找到的建议并尝试无济于事。
每个项目都有一个标题,一个图像(通过AsyncTask加载或从LRUCache中检索),下面项目的价格是我用来生成适配器的代码。
public class ShopAdapter extends BaseAdapter {
public Context context;
public ArrayList<ShopItem> shopItemList;
public ImageCache imageCache;
String imageToLoad;
Bitmap shopImage;
public ShopAdapter(Context context, ArrayList<ShopItem> shopItemList) {
this.context = context;
this.shopItemList = shopItemList;
imageCache = new ImageCache(this.context);
}
@Override
public int getCount() {
return shopItemList.size();
}
@Override
public Object getItem(int position) {
return shopItemList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.shop_list, null);
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.textView3);
holder.image =(ImageView) convertView.findViewById(R.id.imageView);
holder.price = (TextView) convertView.findViewById(R.id.textView4);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(shopItemList.get(position).getTitle());
shopImage = imageCache.getBitmapFromMemoryCache(shopItemList.get(position).getImage());
if(shopImage != null) {
holder.image.setImageBitmap(shopImage);
} else {
new LoadImage(context, holder.image).execute(imageToLoad);
}
holder.price.setText(shopItemList.get(position).getPrice());
return convertView;
}
static class ViewHolder {
TextView title;
ImageView image;
TextView price;
}
}
非常感谢任何帮助!