You have use cordova-file-transfer plugin

Example:

var transfer = new FileTransfer();
transfer.upload(FILE_ABSOLUTE_PATH, "http://example.com/upload", function(sucess){
  // success callback
  console.log(success);
 }, function(fail){
  // failure callback
  console.error(fail);
 });

example on absolute path in Android : /storage/emulated/0/Android/data/.....

use cordova-file-transfer plugin

Thanks. I had seen that. But i had a problem when i tried to save the mp3 file on back-end.

I'm using this java rest (using MultipartHttpServletRequest):

@RequestMapping(value="/{clientId}/conversation/", method = RequestMethod.POST)
        @ResponseBody String chat(@PathVariable("clientId") String clientId, HttpSession session, MultipartHttpServletRequest request){}

But i don't know how to save this mp3 file on disk? Do i need to apply some Encoder?

Note: In Cordova i used options.mimeType="audio/mpeg";