どのようにアンドロイドの高解像度画像を.net APIサーバーにアップロードするのですか？

Question

私は以下のコードを使用してサーバーに画像をアップロードしていますが、画像を低解像度に圧縮しています。

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

@Override 
     protected String doInBackground(String... params) { 
     ByteArrayBody bab; 
     ByteArrayOutputStream bos = new ByteArrayOutputStream(); 

URL url = new URL(webAddressToPost); 
       HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 

       conn.setRequestMethod("POST"); 
       conn.setRequestProperty("Connection", "Keep-Alive"); 
       conn.setRequestProperty("enctype", "multipart/form-data"); 

       MultipartEntity entity = new MultipartEntity(); 

     signature_image.compress(Bitmap.CompressFormat.PNG, 100, bos); 
     byte[] data = bos.toByteArray(); 
     bab = new ByteArrayBody(data, contactNo+"_Signature.png"); 

entity.addPart("file", bab); 
conn.addRequestProperty(entity.getContentType().getName(), entity.getContentType().getValue()); 

OutputStream os = conn.getOutputStream(); 
       entity.writeTo(conn.getOutputStream()); 
       os.close(); 
       conn.connect(); 
} 
} 

圧縮された画像の代わりに高解像度の画像をサーバーにアップロードするにはどうすればよいですか？

Answer 1

あなたのコードは画像を圧縮し、サーバーにアップロードします。代わりに以下のコードを使用して元の解像度の画像をサーバーにアップロードします。

class ImageUploadTask extends AsyncTask<String, Integer, String> { 
     private String webAddressToPost = "WRITE_YOUR_API_URL_TO_UPLOAD_IMAGE"; 

     @Override 
     protected void onPreExecute() { 
     } 


     @Override 
     protected String doInBackground(String... params) { 
      String image_file_type = params[0]; 
      String file_name = params[1]; 
      int i=1; 
      if (i==1){ 


       int day, month, year; 
       int second, minute, hour; 
       GregorianCalendar date = new GregorianCalendar(); 

       day = date.get(Calendar.DAY_OF_MONTH); 
       month = date.get(Calendar.MONTH); 
       year = date.get(Calendar.YEAR); 

       second = date.get(Calendar.SECOND); 
       minute = date.get(Calendar.MINUTE); 
       hour = date.get(Calendar.HOUR); 

       String name=(hour+""+minute+""+second+""+day+""+(month+1)+""+year); 
       String tag=name+".jpg"; 



        fileName = frontCameraImageUrl.replace(frontCameraImageUrl,tag); 
        sourceFile = new File(frontCameraImageUrl); 

       HttpURLConnection conn = null; 
       DataOutputStream dos = null; 
       String lineEnd = "\r\n"; 
       String twoHyphens = "--"; 
       String boundary = "*****"; 
       int bytesRead, bytesAvailable, bufferSize; 
       byte[] buffer; 
       int maxBufferSize = 1 * 1024 * 1024; 


       if (!sourceFile.isFile()) { 


        Log.e("uploadFile", "Source File not exist :"); 


        return "0"; 

       } 
       else 
       { 
        try { 

         // open a URL connection to the Servlet 
         FileInputStream fileInputStream = new FileInputStream(sourceFile); 
         URL url = new URL(webAddressToPost); 

         // Open a HTTP connection to the URL 
         conn = (HttpURLConnection) url.openConnection(); 
         conn.setDoInput(true); // Allow Inputs 
         conn.setDoOutput(true); // Allow Outputs 
         conn.setUseCaches(false); // Don't use a Cached Copy 
         conn.setRequestMethod("POST"); 
         conn.setRequestProperty("Connection", "Keep-Alive"); 
         conn.setRequestProperty("ENCTYPE", "multipart/form-data"); 
         conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); 
         conn.setRequestProperty("uploaded_file", fileName); 

         dos = new DataOutputStream(conn.getOutputStream()); 

         dos.writeBytes(twoHyphens + boundary + lineEnd); 
         dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\"" 
           + file_name + "\"" + lineEnd); 

         dos.writeBytes(lineEnd); 




         // create a buffer of maximum size 
         bytesAvailable = fileInputStream.available(); 

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

         // read file and write it into form... 
         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); 

         } 

         // send multipart form data necesssary after file data... 
         dos.writeBytes(lineEnd); 
         dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 

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

         Log.i("uploadFile", "HTTP Response is : " 
           + serverResponseMessage + ": " + serverResponseCode); 

         if(serverResponseCode == 200){ 

          runOnUiThread(new Runnable() { 
           public void run() { 
            Toast.makeText(MainActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show(); 
           } 
          }); 
         } 

         //close the streams // 
         fileInputStream.close(); 
         dos.flush(); 
         dos.close(); 

        } catch (MalformedURLException ex) { 

         ex.printStackTrace(); 

         runOnUiThread(new Runnable() { 
          public void run() { 
           Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show(); 
          } 
         }); 

         Log.e("Upload file to server", "error: " + ex.getMessage(), ex); 
        } catch (Exception e) { 

         e.printStackTrace(); 

         runOnUiThread(new Runnable() { 
          public void run() { 
           Toast.makeText(MainActivity.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show(); 
          } 
         }); 
         Log.e("Upload Exception", "Exception : " + e.getMessage(), e); 
        } 
        return "serverResponseCode"; 

       } 
      } 

      return null; 
     } 

     @Override 
     protected void onPostExecute(String result) { 
      Toast.makeText(getApplicationContext(), "file uploaded", 
        Toast.LENGTH_LONG).show(); 
     } 

    }