ListView中根据图片URL异步加载Bmob数据库中的图片

package com.example.yw02.recycleapplication; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import java.util.List; import Bean.Goods; import Bean.ViewHolder; /** * Created by YW on 2017/3/22. */ public class MyAdapter extends BaseAdapter { // 创建ImageLoader对象 private ImageLoader imageLoader = ImageLoader.getInstance(); List<Goods> list; LayoutInflater inflater; // private Handler myHandler; // private Bitmap bitmap; public MyAdapter(Context context) { this.inflater = LayoutInflater.from(context); } public void setList(List<Goods> 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; } //起到显示数据的作用 // ViewHolder holder = null; public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { convertView = inflater.inflate(R.layout.fg1_item, null); holder = new ViewHolder(); holder.logo = (ImageView) convertView.findViewById(R.id.item01_logo); holder.title = (TextView) convertView.findViewById(R.id.item01_title); holder.prize = (TextView) convertView.findViewById(R.id.item01_prize); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } Goods goods = (Goods) getItem(position); // String str = goods.getImage().getFileUrl(); String url = goods.getImageUrl(); holder.title.setText(goods.getName()); holder.prize.setText(goods.getPrize().toString()); DisplayImageOptions options = new DisplayImageOptions.Builder() .showImageOnLoading(R.drawable.jiantou)// 设置图片下载期间显示的图片 .showImageForEmptyUri(R.drawable.bing)// 设置图片Uri为空或是错误的时候显示的图片 .showImageOnFail(R.drawable.fengshan)// 设置图片加载或解码过程中发生错误显示的图片 .cacheInMemory(true)// 设置下载的图片是否缓存在内存中 .cacheOnDisk(true)// 设置下载的图片是否缓存在SD卡中 .build();// 创建DisplayImageOptions对象 // 使用ImageLoader加载图片 imageLoader.displayImage(url, holder.logo, options); return convertView; } }