安卓开发 listviev异步加载网络图片

来源：互联网发布：双网卡双网络设置编辑：程序博客网时间：2024/06/08 16:48

将这个类写在listviev对应的activit中

private class asyncIma extends AsyncTask<URL,Integer,String>{    Bitmap bitmapTemp21;    ImageView des;    public asyncIma(ImageView imageView)    {        des=imageView;    }    @Override    protected String doInBackground(URL... params) {        try        {            URL url = new URL("http://juheimg.oss-cn-hangzhou.aliyuncs.com/toh/200905/17/EC23523763.jpg");            InputStream is = url.openStream();            bitmapTemp21 = BitmapFactory.decodeStream(is);        }catch (Exception e)        {}        return null;    }    @Override    protected void onPostExecute(String s) {        try        {            des.setImageBitmap((Bitmap) bitmapTemp21);        }catch (Exception e)        {}    }};

当想直接把listview对应的图片的网址直接放到适配器中可以如下配置适配器

simpleAdapter.setViewBinder(new SimpleAdapter.ViewBinder() {    @Override    public boolean setViewValue(View view, Object data, String textRepresentation) {        if (view instanceof ImageView && data instanceof String) {            final ImageView iv = (ImageView) view;            asyncIma m=new asyncIma(iv);            m.execute();            return true;        } else {            return false;        }    }});
其他操作和以往一样

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