Android如何获取网络上的图片并且显示在ImageView上

/*
 * 获取网上的图片
 */
public class ImageTools {
    public static Bitmap getIcon(String path) {
        Bitmap bitmap = null;
        try {
            URL url = new URL(path);//创建URL连接
            URLConnection connection = url.openConnection();//打开连接
            InputStream stream = connection.getInputStream();//获取输输入流
            bitmap = BitmapFactory.decodeStream(stream);

        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return bitmap;
    }
}

Bitmap bitmap=ImageTools.getIcon("http://write.blog.youkuaiyun.com/postlist");
imageView.setImageBitmap(bitmap);