Comment calculer le pourcentage de la tâche de téléchargement

Question

J'ai une méthode doFileUpload dans UploadAsync classe que extends AsyncTask. Je veux savoir comment calculer le téléchargement de pourcentage de la tâche à partir du code ci-dessous pour mettre à jour un ProgressDialog en utilisant publishProgress(""+values)

private void doFileUpload(){ 
     HttpURLConnection conn = null; 
     DataOutputStream dos = null; 
     DataInputStream inStream = null; 
     String exsistingFileName = "/sdcard/six.3gp"; 
     // Is this the place are you doing something wrong. 
     String lineEnd = "\r\n"; 
     String twoHyphens = "--"; 
     String boundary = "*****"; 
     int bytesRead, bytesAvailable, bufferSize; 
     byte[] buffer; 
     int maxBufferSize = 1*1024*1024; 
     String urlString = "http://192.168.1.5/upload.php"; 
     try 
     { 
      Log.e("MediaPlayer","Inside second Method"); 
      FileInputStream fileInputStream = new FileInputStream(new File(exsistingFileName)); 
      URL url = new URL(urlString); 
      conn = (HttpURLConnection) url.openConnection(); 
      conn.setDoInput(true); 
      // Allow Outputs 
      conn.setDoOutput(true); 
      // Don't use a cached copy. 
      conn.setUseCaches(false); 
      // Use a post method. 
      conn.setRequestMethod("POST"); 
      conn.setRequestProperty("Connection", "Keep-Alive"); 
      conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary); 
      dos = new DataOutputStream(conn.getOutputStream()); 
      dos.writeBytes(twoHyphens + boundary + lineEnd); 
      dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + exsistingFileName +"\"" + lineEnd); 
      dos.writeBytes(lineEnd); 
      Log.e("MediaPlayer","Headers are written"); 
      bytesAvailable = fileInputStream.available(); 
      bufferSize = Math.min(bytesAvailable, maxBufferSize); 
      buffer = new byte[bufferSize]; 
      bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
      while (bytesRead > 0) 
      { 
       dos.write(buffer, 0, bufferSize); 
       bytesAvailable = fileInputStream.available(); 
       bufferSize = Math.min(bytesAvailable, maxBufferSize); 
       bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
      } 
      dos.writeBytes(lineEnd); 
      dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 
      BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
      String inputLine; 
      while ((inputLine = in.readLine()) != null) 
       tv.append(inputLine); 
      // close streams 
      Log.e("MediaPlayer","File is written"); 
      fileInputStream.close(); 
      dos.flush(); 
      dos.close(); 
     } 
     catch (MalformedURLException ex) 
     { 
      Log.e("MediaPlayer", "error: " + ex.getMessage(), ex); 
     } 
     catch (IOException ioe) 
     { 
      Log.e("MediaPlayer", "error: " + ioe.getMessage(), ioe); 
     } 

     //------------------ read the SERVER RESPONSE 
     try { 
      inStream = new DataInputStream (conn.getInputStream()); 
      String str;    
      while ((str = inStream.readLine()) != null) 
      { 
       Log.e("MediaPlayer","Server Response"+str); 
      } 
      /*while((str = inStream.readLine()) !=null){ 

      }*/ 
      inStream.close(); 
     } 
     catch (IOException ioex){ 
      Log.e("MediaPlayer", "error: " + ioex.getMessage(), ioex); 
     } 
    } 

Merci

Answer 1

J'ai eu un problème similaire une fois, j'ai utilisé un curseur pour suivre les octets téléchargés comme mentionné ici: Show Download progress inside activity using DownloadManager

Answer 2

voilà comment je l'ai fait dans ma demande

long total = 0; 
int lenghtOfFile=connection.getContentLength(); 

      while ((count = input.read(data)) != -1) { 
       total += count; 
       // publishing the progress.... 
       // After this onProgressUpdate will be called 
       publishProgress(""+(int)((total*100)/lenghtOfFile)); 
       // writing data to file 
       output.write(data, 0, count); 
       if (isCancelled()) break; 
      } 

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