使用SimpleAdapter显示网络图片

SimpleAdapter本身是不支持网络图片的，绑定setViewBinder显示一张网络图片。

SimpleAdapter adapter = new SimpleAdapter(this, getData(), R.layout.like_list,
                new String[]{"news_img", "news_title", "news_desc"},
                new int[]{R.id.like_img, R.id.like_title, R.id.like_desc});
        adapter.setViewBinder(new SimpleAdapter.ViewBinder() {
            public boolean setViewValue(View view, Object data,
                                        String textRepresentation) {
                if (view instanceof ImageView) {
                    URL url = null;
                    try {
                        url = new URL((String) data);
                        ImageView iv = (ImageView) view;
                        iv.setImageBitmap(BitmapFactory.decodeStream(url.openStream()));
                    } catch (MalformedURLException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return true;
                } else
                    return false;
            }
        });

其中，news_img字段为data的url。