How to download the file from server to android phone

It is recommended that whenever one wants to download any file from server whether it is song or any image , it must perform in the background either by using asynctask or using a thread.

Here, we are using Asynctask:-

/**
* Downloading file in background thread
*/
boolean download = true;

@Override
protected String doInBackground(String... params) 
     {
        File SDCardRoot = Environment.getExternalStorageDirectory(); // location where you want to store 
        File directory = new File(SDCardRoot, "/my_folder/"); //create directory to keep your downloaded file
        if (!directory.exists()) 
        {
          directory.mkdir();
        }
        String fileName = "mySong" + ".mp3"; //song name that will be stored in your device in case of song
        //String fileName = "myImage" + ".jpeg"; in case of image
        try 
           {
              InputStream input = null;
              try{
                   URL url = new URL(fileUrl); // link of the song which you want to download like (http://...)
                   input = url.openStream();
                   OutputStream output = new FileOutputStream(new File(directory, fileName));
                   download = true;
                   try {
                       byte[] buffer = new byte[1024];
                       int bytesRead = 0;
                       while ((bytesRead = input.read(buffer, 0, buffer.length)) >= 0) 
                         {
                          output.write(buffer, 0, bytesRead);
                          download = true;
                         }
                      output.close();
                    }
                   catch (Exception exception) 
                    {
                     MyUtility.showLog("output exception in catch....."+ exception + "");
                     download = false;
                     output.close();
                     progressDialog.dismiss();
                    } 
                 }
              catch (Exception exception) 
                   {
                     MyUtility.showLog("input exception in catch....."+ exception + "");
                     download = false;
                     progressDialog.dismiss();
                    } 
             finally 
                  {
                    input.close();
                  }
         } 
       catch (Exception exception) 
          {
            download = false;
            progressDialog.dismiss();
          }
        return download;
    }

@Override
protected void onPostExecute(String status) 
     {
        if(download)
              Toast.makeText(getApplicationContext(), "Download successfull", Toast.LENGTH_SHORT).show();
        else
              Toast.makeText(getApplicationContext(), "Download Failed", Toast.LENGTH_SHORT).show();
     }