Android play mp3 file

Hi, i need your help so much, so i want to play a mp3 file into my android app, ok, i wrote the code using NAudio, and there's the problem, it works only on windows, on android i hear nothing, i mean the list of all music files i get but to play them i can't, pleaseee help mee. Oh, forgot to say that first it converts mp3 to wav(on line: audio.clip = NAudioPlayer.FromMp3Data (www.bytes);), i just tried someone's code, but it seems non-workable(just for PC) Full code is:

 using UnityEngine;
 using System.IO;
 using System.Collections;
 using System.Collections.Generic;
 using NAudio;
 using NAudio.Wave;
 
 public class MusicSelect : MonoBehaviour {
 
     private string _curPath;
     public List<string> _curMusicNames, _curMusicPaths;
 
     public void GetCurFiles()
     {
         _curMusicNames.Clear ();
         _curMusicPaths.Clear ();
 
         _curPath = Directory.GetCurrentDirectory ();
         Debug.Log ("Path:"+_curPath);
         if (Application.platform != RuntimePlatform.Android)
             return;
         #if UNITY_ANDROID
         using (AndroidJavaClass jcEnvironment = new AndroidJavaClass ("android.os.Environment"))
         using (AndroidJavaObject joExDir = jcEnvironment.CallStatic<AndroidJavaObject> ("getExternalStorageDirectory")) {
             _curPath = joExDir.Call<string> ("toString") + "/Music";
         }
         #endif
 
         DirectoryInfo dir = new DirectoryInfo(_curPath);
         FileInfo[] info = dir.GetFiles("*.mp3");
         foreach (FileInfo f in info) 
         {
             _curMusicNames.Add( f.Name );
             _curMusicPaths.Add( f.FullName );
         }
     }
 
     void OnGUI() {
         if(_curMusicPaths.Count>0)
         {
             for(int i=0; i<_curMusicPaths.Count; i++)
             {
                 if (GUI.Button(new Rect(0,i*170, Screen.width, 150),_curMusicPaths[i])){
                     Debug.Log ("Playing "+_curMusicNames[i]);
                     StartCoroutine (PlayThis("file://"+_curMusicPaths[i]));
                 }
             }
         }
     }
 
     IEnumerator PlayThis(string url)
     {
         WWW www = new WWW(url);
         yield return www;
         AudioSource audio = GetComponent<AudioSource>();
         audio.clip = NAudioPlayer.FromMp3Data (www.bytes);
         audio.Play();
     }
 }