java - 可以在使用 Asynctask 将文件上传到服务器时显示估计时间、kbs、mb

Question

我正在使用 AsyncTask 将视频文件上传到服务器，我的目标是显示估计时间以及每秒上传到服务器的兆字节数，以便用户知道上传需要多长时间，我有一个示例代码可以显示上传文件的百分比，任何人都可以指导我如何实现这一点，非常感谢任何帮助。谢谢

我看到这段代码:

private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
        @Override
        protected void onPreExecute() {
            prog_percentage.setProgress(0);
            super.onPreExecute();
        }
        @Override
        protected void onProgressUpdate(Integer... progress) {
            prog_percentage.setProgress(progress[0]);
            percentage.setText(String.valueOf(progress[0]) + "%");
        }
        @Override
        protected String doInBackground(Void... params) {
            return uploadFile();
        }
        @SuppressWarnings("deprecation")
        private String uploadFile() {
            String responseString = null;
            try {
                HttpClient httpclient = new DefaultHttpClient();
                HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL_FOR_IMAGE);

                Log.i("UploadApp", "upload url: " + Config.FILE_UPLOAD_URL_FOR_IMAGE);

                AndroidMultiPartEntity entity;
                entity = new AndroidMultiPartEntity(
                        new AndroidMultiPartEntity.ProgressListener() {
                            @Override
                            public void transferred(long num) {
                                publishProgress((int) ((num / (float) totalSize) * 100));
                            }
                        });
                File sourceFile;
                sourceFile = new File(selectedFilePath);

                // Adding file data to http body
                entity.addPart("image", new FileBody(sourceFile));

                totalSize = entity.getContentLength();
                httppost.setEntity(entity);

                // Making server call
                HttpResponse response = httpclient.execute(httppost);
                HttpEntity r_entity = response.getEntity();

                int statusCode = response.getStatusLine().getStatusCode();
                if (statusCode == 200) {
                    // Server response
                    responseString = EntityUtils.toString(r_entity);
                } else {
                    responseString = "Error occurred! Http Status Code: " + statusCode;
                }
            } catch (ClientProtocolException e) {
                responseString = e.toString();
                Log.e("UploadApp", "exception: " + responseString);
            } catch (IOException e) {
                responseString = e.toString();
                Log.e("UploadApp", "exception: " + responseString);
            }
            return responseString;
        }
        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
        }
    }

Answer 1

你的线路

publishProgress((int) ((num / (float) totalSize) * 100));

实际上是计算上传大小的百分比，因此您必须将“num”传递给进度而不是计算结果。然后您可以在这一侧计算您想要的所有值。