Android浏览器无法从servlet响应下载文件？

Question

我想使用android默认浏览器从servlet下载文件，下载代码如下：

    byte[] bytes = objectToBytes(targetObject);
    String filename = URLEncoder.encode(infoCard.getCardName() + ".xxx", "UTF-8");
    response.reset();
    response.setContentType("application/octet-stream");
    response.setHeader("Content-Transfer-Encoding", "Binary");
    response.setHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");
    response.setContentLength(bytes.length);

    ServletOutputStream out = response.getOutputStream();
    out.write(bytes);
    out.close();

此代码适用于PC或Android上的Opera，但默认浏览器无法成功下载。我该怎么做才能支持默认浏览器？

    This problem is caused by the HTTPS.