本文实例讲述了Android实现ListView异步加载的方法。分享给大家供大家参考，具体如下：

@Override public View getView(int position, View convertView, ViewGroup parent) { ………… ViewHolder VH = null; ………… VH.mImageView.setTag(position); VH.mThumb.setImageDrawable(imageLoader.loadDrawable(position, new ImageCallback() { public void imageLoaded(Drawable imageDrawable, int position) { ImageView imageViewByTag = (ImageView) mList.findViewWithTag(position); if (imageViewByTag != null) { imageViewByTag.setImageDrawable(imageDrawable); } } })); } private static LruCache<Long, Drawable> mCache = new LruCache<Long, Drawable>(100); public class AsyncImageLoader { public Drawable loadDrawable(final int position, final ImageCallback callback){ Drawable d = null; d = mCache.get(position); if (d == null) { final Handler handler=new Handler(){ @Override public void handleMessage(Message msg) { callback.imageLoaded((Drawable) msg.obj, position); } }; Thread t = new Thread(){ public void run() { Drawable drawable = Utils.getDrawable(mContext, position, 1, mMyDefaultIcon); Drawable value = mCache.get(position);//cache有可能已经被更改了，所以重新取一次 if (value == null) { mCache.put(position, drawable); } else { drawable = value; } handler.sendMessage(handler.obtainMessage(0,drawable)); }; }; t.setPriority(Thread.MIN_PRIORITY); t.start(); return mMyDefaultIcon; } else { return d; } } } public interface ImageCallback{ public void imageLoaded(Drawable imageDrawable, int position); }

这个是在前面一篇http://www.jb51.net/article/90408.htm基础上修改的。主要为了加入LruCache

后来发现，这种方法要不停的开辟新的线程，效率并不是很高。最后改为加入一后台线程，不停从后进先出队列中取出任务进行处理。

希望本文所述对大家Android程序设计有所帮助。