文件上传进度上传前跳跃到100％ [英] file upload progress jumping to 100% before upload

问题描述

我无法做到进度百分比这个文件上传功能。我GOOGLE了很多我无法找到解决办法

I am not able to do progress percentage to this file upload function. I googled it a lot i couldn't find solution

这是类

protected void onProgressUpdate(Integer... progress) {
         super.onProgressUpdate(progress);


         notification.contentView.setProgressBar(R.id.progressBar, 10, progress[0], false);
         contentView.setTextViewText(R.id.text, "changed");
        mNotificationManager.notify(NOTIFICATION_ID, notification);

      }

    @Override
    protected String doInBackground(String... urls) {

        String upLoadServerUri = upurl;
        String fileName = urls[0];
        HttpURLConnection connection = null;
        DataOutputStream outputStream = null;
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";
        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 100 * 1024 * 1024;
        File sourceFile = new File(fileName);
        int sentBytes = 0;
        long fileSize = sourceFile.length();

         try
            {
                FileInputStream fileInputStream = new FileInputStream(new     File(urls[0]));

                URL url = new URL(upurl);
                connection = (HttpURLConnection) url.openConnection();

                // Allow Inputs & Outputs
                connection.setDoInput(true);
                connection.setDoOutput(true);
                connection.setUseCaches(false);

                // Enable POST method
                connection.setRequestMethod("POST");

                connection.setRequestProperty("Connection", "Keep-Alive");
                connection.setRequestProperty("Content-Type",     "multipart/form-data;boundary="+boundary);

                outputStream = new DataOutputStream(     connection.getOutputStream() );
                outputStream.writeBytes(twoHyphens + boundary + lineEnd);
                outputStream.writeBytes("Content-Disposition: form-data; name=\"file[]\";filename=\""+ fileName + "\"" + lineEnd);
                outputStream.writeBytes(lineEnd);

                bytesAvailable = fileInputStream.available();
                Log.v("Size",bytesAvailable+"");

                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                buffer = new byte[bufferSize];


                // Read file
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);

                while (bytesRead > 0)
                {

                      // Update progress dialog
                    sentBytes += bytesRead;
                    publishProgress((int)(sentBytes * 100 / fileSize));

                    outputStream.write(buffer, 0, bufferSize);

                    bytesAvailable = fileInputStream.available();
                    Log.v("Available",bytesAvailable+"");



                    bufferSize = Math.min(bytesAvailable,     maxBufferSize);
                    bytesRead = fileInputStream.read(buffer, 0,      bufferSize);
                }

                outputStream.writeBytes(lineEnd);
                outputStream.writeBytes(twoHyphens + boundary + twoHyphens     + lineEnd);


                Scanner s;
                 s = new Scanner(connection.getInputStream());
                 s.useDelimiter("\\Z");
                 final String response = s.next();

                // Responses from the server (code and message)
                int serverResponseCode       = connection.getResponseCode();
                String serverResponseMessage = connection.getResponseMessage();

                if(serverResponseCode == 200)
                 {

                     runOnUiThread(new Runnable() {
                          public void run() {


                             Toast.makeText(BabupMain.this, "server say :" + response , Toast.LENGTH_SHORT).show();
                             Toast.makeText(BabupMain.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
                          }
                      });
                 }


                fileInputStream.close();
                outputStream.flush();
                outputStream.close();

            } catch (MalformedURLException ex) {

                runOnUiThread(new Runnable() {
                    public void run() {


                        Toast.makeText(BabupMain.this, "Error 1 ", Toast.LENGTH_SHORT).show();
                    }
                });

            } catch (final Exception e) {

                runOnUiThread(new Runnable() {
                    public void run() {


                        Toast.makeText(BabupMain.this, "Error 2 "+ e.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                });
            }

            //publishProgress();

            return null;


    }

任何想法！

推荐答案

很难说真的，但考虑更改

Hard to say really, but consider changing

publishProgress((int)(sentBytes * 100 / fileSize))

要

double progress = (double)sentBytes / fileSize;
publishProgress((int)progress);

---

修改

我要改变这一点：

bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];

bytesRead = fileInputStream.read(buffer, 0, bufferSize);

while (bytesRead > 0)
{

      // Update progress dialog
    sentBytes += bytesRead;
    publishProgress((int)(sentBytes * 100 / fileSize));

    outputStream.write(buffer, 0, bufferSize);

    bytesAvailable = fileInputStream.available();
    Log.v("Available",bytesAvailable+"");



    bufferSize = Math.min(bytesAvailable,     maxBufferSize);
    bytesRead = fileInputStream.read(buffer, 0,      bufferSize);
}

要

缓冲=新的字节[MAXBUFFERSIZE];

buffer = new byte[maxBufferSize];

while (true)
{
    int bytesToRead = Math.min(maxBufferSize, fileInputStream.available());

    // Break if complete
    if(bytesToRead == 0){ break; }

    // Read bytes
    bytesRead = fileInputStream.read(buffer, 0, bytesToRead);

    // Write bytes
    outputStream.write(buffer, 0, bytesRead);

    // Update progress dialog
    sentBytes += bytesRead;

    // Publish progress
    double progress = (double)sentBytes / fileSize;
    publishProgress((int)progress);
}

如果您遇到这样的问题，我想放弃了 FileInputStream.available（）的办法，从的 File.length（） 并打破循环时读取动作方式＆gt; = File.length（）

If you're having issues with this, I'd abandon the FileInputStream.available() approach, get the total number of bytes from File.length() and break out of the loop when bytesRead >= File.length().

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