android 通过httpclient下载文件并保存

代码：（主要针对图片、gif下载无问题）

/**
     * 下载网络文件
     * @param url  请求的文件链接
     * @param IsMD5Name  是否MD5加密URL来命名文件名
     * @param cachePath 保存的路径
     * @return 返回文件的位置path
     */
    public static String getDownloadFile2Cache(String url,boolean IsMD5Name,String cachePath)
    {
        String filePath = null;
        try {
            HttpGet httpRequest = new HttpGet(url);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);
            HttpEntity entity = response.getEntity();
            BufferedHttpEntity bufferedHttpEntity = new BufferedHttpEntity(entity);
            InputStream is = bufferedHttpEntity.getContent();
            String fileName = null;
            if(IsMD5Name) //是否以MD5命名下载的文件
            {
                fileName = MD5Util.To32MD5(url)+url.substring(url.lastIndexOf('.'));
            }
            else
            {
                fileName = url.substring(url.lastIndexOf('/')+1);
            }
            FileOutputStream fos = new FileOutputStream(cachePath+"/"+fileName);
            byte buf[] = new byte[1024];
            int numread;
            while ((numread = is.read(buf)) != -1) {
                fos.write(buf, 0, numread);
                }
            fos.close();
            is.close();
            filePath = cachePath+"/"+fileName;
        } catch (IOException e) {
            e.printStackTrace();
        }catch (Exception e) {
            e.printStackTrace();
        }
        return filePath;
    }