如何將圖像從Android發送到用C++編寫的服務器

Question

我想從Android發送圖片到用C++編寫的服務器。我希望使用套接字發送圖像，以便不必擔心C++和Java之間的差異。但是，Android中的圖像通常以位圖的形式存儲，它是Android中定義的類，但在C++中，該類不存在。所以我想知道如果我想以這種方式發送圖像該怎麼做。所以我來這裏尋求幫助，謝謝。

Answer 1

發送圖像像.jpg文件或.png

Answer 2

我假定服務器的自定義系統，你提到了用C++編寫。在這種情況下，您可以簡單地通過每個tcp/ip的套接字發送大小（x，y）和rgba數據（每像素32位）。

您只需打開一個從客戶端（android）到服務器（C++）的tcp/ip連接，從位圖發送大小和數據並在服務器端重新構建它並保存或處理它任何你想要的方式。

你可以用「的getPixels」獲取Android位的RGBA數據：

http://developer.android.com/reference/android/graphics/Bitmap.html

您可以設置它取決於你把它太系統。如果您使用的是Windows系統，你可以用「setdibbits」

http://msdn.microsoft.com/en-us/library/dd162973%28v=vs.85%29.aspx

Answer 3

這裏是我用來發送參數也和圖像後設置！

public void send_data() throws IOException 
    { 


       HttpURLConnection connection = null; 
       DataOutputStream outputStream = null; 
       String lineEnd = "\r\n"; 
       String twoHyphens = "---"; 
       String boundary = "ABCADA"; 

       String urlServer = "http://yourwebsrvr.com"; 
       Log.w("DHA", urlServer); 
       URL url = null; 
       try { 
        url = new URL(urlServer); 
       } catch (MalformedURLException e1) { 

        Log.w("DHA", "PROTOCOL EXCEPTION"); 

        e1.printStackTrace(); 
       } 
       if (url != null) 
       { 
        Log.w("DHA", "Merge aici"); 
        try { 
         connection = (HttpURLConnection) url.openConnection(); 
        } catch (IOException e1) { 
         // TODO Auto-generated catch block 
         e1.printStackTrace(); 
        } 
        if (connection != null) 
        { 
         Log.w("DHA", "Si aici mere!"); 
         connection.setDoInput(true); 
         connection.setDoOutput(true); 
         connection.setUseCaches(false); 
         try { 
          connection.setRequestMethod("POST"); 
         } catch (ProtocolException e) { 

          Log.w("DHA", "PROTOCOL EXCEPTION"); 

          e.printStackTrace(); 
          return; 
         } 
         connection.setRequestProperty("Host", "yourhost.com"); 
         connection.setRequestProperty("Connection", "Keep-Alive"); 
         connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=ABCADA"); 
         try { 
          outputStream = new DataOutputStream(connection.getOutputStream()); 
         } catch (IOException e) { 

          Log.w("DHA", "PROTOCOL EXCEPTION"); 

          e.printStackTrace(); 

         } 
         try { 
          Log.w("DHA", "Val is + " + String.valueOf(bts.size())); 
          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"Lat\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes("0" + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"IMEI\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes(getImei() + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"Lon\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes("0" + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"comment\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes("Incarcata la sincronizare" + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"locatie_id\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          SharedPreferences pref = getSharedPreferences("data",MODE_WORLD_WRITEABLE); 
          String data_db = pref.getString(md5hash, "0"); 
          Log.d("DHA", "Poze e aici " + data_db); 
          outputStream.writeBytes(data_db + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"hash\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes(md5hash + lineEnd); 

          outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
          outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + "PICT0000" +"\"" + lineEnd); 
          outputStream.writeBytes(lineEnd); 
          outputStream.write(bts.toByteArray()); 
          outputStream.writeBytes(lineEnd); 
          outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 
          Log.w("DHA", "Incep trimiterea pozei fraierului!"); 

          outputStream.flush(); 
          outputStream.close(); 
          Log.w("DHA", "response" + String.valueOf(connection.getResponseCode())); 

         } catch (IOException e) { 

          Log.w("DHA", "PROTOCOL EXCEPTION"); 

          e.printStackTrace(); 
         } 



      } 
       } 


      }