通过URL从IP摄像机获取快照图像



我正试图从海康威视IP摄像机的URL中获取图片,该URL的格式大致如下:
http://IPaddress:port#/Streaming/channels/1/picture
然而,正如您所注意到的,文件夹只是命名为picture,没有直接链接到图像及其扩展名。当我使用Picasso库或只是普通的HttpConnection时,它无法获得图像/位图。否则我如何检索图像?当我在网络浏览器中输入URL时,它会完美加载,并显示图片为.jpeg格式

编辑
每当我尝试使用InputStreamBitmap访问快照图像时,我都会收到一个FileNotFoundException错误

Dario指出的问题是身份验证。返回状态401,这就是抛出FileNotFoundException的原因
他给我的答案有很多不推荐的方法,我的Gradle甚至连一些类都拿不到
然而,在以下论坛1、2的帮助下,我找到了另一种方法,所以我结合了另一个我找不到的验证页面,并得到了以下内容:

boolean isSaved = false;
         try {
             HttpClient client = new DefaultHttpClient();
             HttpGet request = new HttpGet();
             request.setURI(new URI(AppConst.IMAGE_URL));
             UsernamePasswordCredentials credentials =
                     new UsernamePasswordCredentials(AppConst.USERNAME, AppConst.PASSWORD);
             BasicScheme scheme = new BasicScheme();
             Header authorizationHeader = scheme.authenticate(credentials, request);
             request.addHeader(authorizationHeader);
             HttpResponse response = client.execute(request);
             Log.d("responseType",response!=null? response.getEntity().getContentType().toString():"emptyType");
             Log.d("responseCode", response != null ? String.valueOf(response.getStatusLine().getStatusCode()) : "emptyCode");
             if((response.getStatusLine().getStatusCode()==200) && (response.getEntity()!=null)){//status OK and not empty
                 //save stuff
                 HttpEntity entity = response.getEntity();
                 if (entity != null) {
                     InputStream instream = entity.getContent();
                     String path = APP_DIR+System.currentTimeMillis()+".jpg";
                     FileOutputStream output = new FileOutputStream(path);
                     int bufferSize = 1024;
                     byte[] buffer = new byte[bufferSize];
                     int len = 0;
                     while ((len = instream.read(buffer)) != -1) {
                         output.write(buffer, 0, len);
                     }
                     output.close();
                     Log.d("Snapshot Filename: ", path);
                     isSaved = true;
                 }
             }else{
                 isSaved= false;
             }
         }catch (Exception ex){
             Log.e("saveImageError",ex!=null? ex.getMessage():"error");
         }



必须在android部分下的渐变中添加以下行:
useLibrary 'org.apache.http.legacy'

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