Android 使用XML解析从URL获取图像

我希望使用xml解析从url编辑图像，并在gridview中显示该图像，以及从设备图像库中显示更多图像。如何获取图像请告诉解决方案

private byte[] getImageByteArray(String url) {

        try {
            DefaultHttpClient mHttpClient = new DefaultHttpClient();
            HttpGet mHttpGet = new HttpGet(url);
            HttpResponse mHttpResponse = mHttpClient.execute(mHttpGet);
            if (mHttpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                HttpEntity entity = mHttpResponse.getEntity();
                if (entity != null) {
                    return EntityUtils.toByteArray(entity);
                }
            }
        } catch (Exception e) {
            Log.e("Exception", e.getMessage(), e);
        }
        return null;

    }