Question

我已经编写了以下代码来通过服务器上传wav文件，我面临的问题是进度条移动得太快，直到99％并完成服务器返回200 OK响应。

但我在Dropbox中看到，当我上传文件时，我可以看到进度条逐渐移动并且看起来很有说服力。

任何人都知道如何展示无缝进度条。

    @Override
        protected String doInBackground(Void...args) {
            // TODO Auto-generated method stub


            System.out.println(uploadLink);
            FileInputStream sourceFile = null;

            try {
                sourceFile = new FileInputStream(to);
            } catch (FileNotFoundException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }




            URL url;
            try {

                byte[] bytes = new byte[(int) to.length()];
                sourceFile.read(bytes);


                url = new URL(uploadLink);
                connection = (HttpURLConnection) url.openConnection();
                connection.setDoInput(true);
                connection.setDoOutput(true);
                connection.setUseCaches(false);
                connection.setRequestMethod("POST");    

                connection.setRequestProperty("Connection", "Keep-Alive");
                connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
                out = new DataOutputStream( connection.getOutputStream() );
                out.writeBytes(twoHyphens + boundary + lineEnd);                
                out.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + templateID + ".wav" + "\"" + lineEnd);
                out.writeBytes(lineEnd);
                bytesAvailable = sourceFile.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                buffer = new byte[bufferSize];

                Log.d("BYTES" , bytesAvailable + " "+bufferSize +" "+  bytes.length);

                int bufferLength = 1024;

                for (int i = 0; i < bytes.length; i += bufferLength) {

                    int progress = (int)((i / (float) bytes.length) * 100);
                    publishProgress(progress);

                    if (bytes.length - i >= bufferLength) {
                        out.write(bytes, i, bufferLength);
                    } else {
                        out.write(bytes, i, bytes.length - i);
                    }
                }


               out.writeBytes(lineEnd);
               out.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
               sourceFile.close();
               out.flush();
               out.close();            



            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();



                return null;
            } 
             try {
                 in = new DataInputStream ( connection.getInputStream() );
                 String str;

                 Log.d("STATUS",connection.getResponseCode()+ " ");

                 if(connection.getResponseCode() == 200)
                 {                   
                     while (( str = in.readLine()) != null)
                     {
                      Log.e("Debug","Server Response "+str);
                      publishProgress(100);





                     }
                 }


                 in.close();

           }
           catch (IOException ioex){
                Log.e("Debug", "error: " + ioex.getMessage(), ioex);
           }

            // Get the source File


            return "success";
        }

Answer 1

我也很难做到这一点，客户总是说进展并不真实。

我找到的解决方案是在setFixedLengthStreamingMode对象中使用HttpURLConnection（请参阅有关setFixedLengthStreamingMode here的详情）。基本上这样做的是Content-Length标头设置得更快，因此URLConnection可以更频繁地刷新。

您的代码应该是这样的：

String header = twoHyphens + boundary + lineEnd + "Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + templateID + ".wav" + "\"" + lineEnd + lineEnd;
String closingHeader = lineEnd + twoHyphens + boundary + twoHyphens + lineEnd;

int bytesToBeSent = header.lenght() + closingHeader.lenght() + (int)to.length();

connection.setFixedLengthStreamingMode(bytesToBeSent);

必须在使用setRequestMethod()之前设置此项。

Answer 2

如果速度快，那就快，不是吗？我建议的唯一方法就是在完成上传后拨打publishProgress(100);，直到收到回复为止。

Answer 3

键是setChunkedStreamingMode（）。您需要在setRequestMethod（）之前将其设置为文件长度。这将以块的形式发送字节，并让您了解进度条中的进度。设置完毕后，您可以使用问题中提供的代码。

进度条卡住并在上传文件时移动太快

3 个答案: