我正在为列表视图中的每一行加载不同的图像，我查看了几个教程并观看了有关此最佳实践的谷歌视频，但它仍然无法正常工作。我的列表视图项目最终以幻灯片形式显示所有图像，并且当我滚动列表时它们也会发生变化。
我正在使用通用图像加载器来下载和缓存我的图像。这是我整个班级的代码。我似乎无法让它发挥作用。
public class EventAdapter extends ArrayAdapter<EventDetails>{
private Context context;
LayoutInflater inflater;
LinkedList<EventDetails> event_details;
ImageView event_imge;
ViewHolder holder;
public ImageLoader imageLoader;
public EventAdapter(Context mcontext,
LinkedList<EventDetails> m_event_details) {
super(mcontext, R.layout.event_list_row, m_event_details);
this.context = mcontext;
this.event_details = new LinkedList<EventDetails>();
this.event_details = m_event_details;
}
public View getView(int position, View myview, ViewGroup parent) {
View v = myview;
if (inflater == null) {
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
if (v == null) {
v = inflater.inflate(R.layout.event_list_row, parent,
false);
imageLoader = ImageLoader.getInstance();
holder = new ViewHolder();
holder.event_name = (TextView) v.findViewById(R.id.event_name);
holder.event_show = (TextView) v.findViewById(R.id.event_show);
holder.event_time = (TextView) v.findViewById(R.id.event_time);
holder.event_date = (TextView) v.findViewById(R.id.event_date);
holder.event_genre = (TextView) v.findViewById(R.id.event_genre);
holder.event_price = (TextView) v.findViewById(R.id.event_price);
holder.img = (ImageView) v.findViewById(R.id.event_image);
holder.event_ll = (LinearLayout) v.findViewById(R.id.event_frame_ll);
v.setTag(holder);
}else{
holder = (ViewHolder) v.getTag();
}
final EventDetails eD = event_details.get(position);
if(eD != null){
holder.event_name.setText(eD.name.toUpperCase());
holder.event_show.setText(eD.show.toUpperCase());
holder.event_time.setText(eD.time.toUpperCase());
holder.event_date.setText(eD.date.toUpperCase());
holder.event_price.setText("£"+String.format("%.2f", eD.price));
holder.event_genre.setText(eD.genre.toUpperCase());
if(eD.isStandBy == 0){
holder.event_ll.setVisibility(View.GONE);
}else{
holder.event_ll.setVisibility(View.VISIBLE);
}
holder.img.setTag(eD.image_url[0]);
if(MemoryCacheUtil.findCachedBitmapsForImageUri(eD.image_url[0], ImageLoader.getInstance().getMemoryCache()).size() > 0){
//holder.img.setBackgroundDrawable(new BitmapDrawable(MemoryCacheUtil.findCachedBitmapsForImageUri(eD.image_url[0], ImageLoader.getInstance().getMemoryCache()).get(0)));
holder.img.setImageBitmap(MemoryCacheUtil.findCachedBitmapsForImageUri(event_details.get(position).image_url[0], ImageLoader.getInstance().getMemoryCache()).get(0));
}else{
DisplayImageOptions options = new DisplayImageOptions.Builder().cacheInMemory(true).build();
ImageLoader.getInstance().loadImage(eD.image_url[0], options, new SimpleImageLoadingListener() {
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
//holder.img.setBackgroundDrawable(new BitmapDrawable(loadedImage));
holder.img.setImageBitmap(loadedImage);
}
});
}
}
return v;
}
static class ViewHolder{
TextView event_name;
TextView event_show;
TextView event_time;
TextView event_date;
TextView event_genre;
TextView event_price;
ImageView img;
LinearLayout event_ll;
}