android - 我需要知道已经上传了多少字节来更新进度条android

Question

我正在开发一个用于将视频上传到 Apache/PHP 服务器的应用程序。这一刻我已经可以上传视频了。我需要在上传文件时显示进度条。我有下一个代码使用 AsyncTask 和 HTTP 4.1.1 库来模拟 FORM。

class uploadVideo extends AsyncTask<Void,Void,String>{

    @Override
    protected String doInBackground(Void... params) {
        // Create a new HttpClient and Post Header
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://www.youtouch.cl/videoloader/index.php");           
        try {
            // Add your data
            File input=new File(fileName);              

            MultipartEntity multi=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);                

            multi.addPart("video", new FileBody(input));                

            httppost.setEntity(multi);

            // Execute HTTP Post Request
            HttpResponse response = httpclient.execute(httppost);               

            HttpEntity entity = response.getEntity();

            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(
                            entity.getContent(), "UTF-8"));
            String sResponse = reader.readLine();
            return sResponse;

        } catch (ClientProtocolException e) {
            Log.v("Uri Galeria", e.toString());
            e.printStackTrace();                

        } catch (IOException e) {
            Log.v("Uri Galeria", e.toString());
            e.printStackTrace();                
        }
        return "error";
    }

    @Override
    protected void onProgressUpdate(Void... unsued) {
                //Here I do should update the progress bar
    }

    @Override
    protected void onPostExecute(String sResponse) {
        try {
            if (pd.isShowing())
                pd.dismiss();

            if (sResponse != null) {
                JSONObject JResponse = new JSONObject(sResponse);
                int success = JResponse.getInt("SUCCESS");
                String message = JResponse.getString("MESSAGE");
                if (success == 0) {
                    Toast.makeText(getApplicationContext(), message,
                            Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(),
                            "Video uploaded successfully",
                            Toast.LENGTH_SHORT).show();

                }
            }
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(),
                    e.getMessage(),
                    Toast.LENGTH_LONG).show();
            Log.e(e.getClass().getName(), e.getMessage(), e);
        }
    }

我需要知道从哪里可以获得已上传的字节数。 File.length 是总大小。

Answer 1

您是否尝试过扩展 FileBody？据推测，POST 将调用 getInputStream() 或 writeTo() 以实际将文件数据发送到服务器。您可以扩展其中任何一个(包括 getInputStream() 返回的 InputStream)并跟踪已发送的数据量。