Android编程学习之异步加载图片的方法

this.context = context; this.activity = (Activity) context;

imageLoader = new ImageLoader(context); }

public void setData(List<Menu> list) { this.list = list;

} @Override

public int getCount() { return list.size();

} @Override

public Object getItem(int position) { return list.get(position);

} @Override

public long getItemId(int position) { return position;

} @Override

public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) {

convertView = LayoutInflater.from(context).inflate( R.layout.listview_item, null);

viewHolder = new ViewHolder(); viewHolder.tv = (TextView) convertView.findViewById(R.id.item_tv);

viewHolder.iv = (ImageView) convertView.findViewById(R.id.item_iv); convertView.setTag(viewHolder);

} else { viewHolder = (ViewHolder) convertView.getTag();

} viewHolder.tv.setText(list.get(position).getDishes());

imageLoader.DisplayImage(list.get(position).getPicPath(), activity, viewHolder.iv);

return convertView; }

private class ViewHolder { private ImageView iv;

private TextView tv; }

}