Android Play Web Radio not work

I tried this code but it does not work

   private View.OnClickListener pausePlay = new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            // TODO Auto-generated method stub

            if (!playPause) {
                btnPlay.setImageResource(R.mipmap.play);
                if (intialStage) {
                    System.out.println("LINK RADIO\t" + json_link);
                    new Player()
                            .execute(json_url);
                }else {
                    if (!mediaPlayer.isPlaying())
                        mediaPlayer.start();
                }
                playPause = true;
            } else {
               btnPlay.setImageResource(R.mipmap.play);
                if (mediaPlayer.isPlaying())
                    mediaPlayer.pause();
                playPause = false;
            }
        }
    };

    class Player extends AsyncTask<String, Void, Boolean> {
        private ProgressDialog progress;

        @Override
        protected Boolean doInBackground(String... params) {
            // TODO Auto-generated method stub
            Boolean prepared;
            try {

                mediaPlayer.setDataSource(params[0]);

                mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

                    @Override
                    public void onCompletion(MediaPlayer mp) {
                        // TODO Auto-generated method stub
                        intialStage = true;
                        playPause=false;
                        btnPlay.setBackgroundResource(R.mipmap.play);
                        mediaPlayer.stop();
                        mediaPlayer.reset();
                    }
                });
                mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    public void onPrepared(MediaPlayer mp) {
                      //  mp.start();
                        mediaPlayer.start();
                    }
                });
                mediaPlayer.prepareAsync();
                prepared = true;
            } catch (IllegalArgumentException e) {
                Log.d("IllegarArgument", e.getMessage());
                prepared = false;
                e.printStackTrace();
            } catch (SecurityException e) {
                prepared = false;
                e.printStackTrace();
            } catch (IllegalStateException e) {
                prepared = false;
                e.printStackTrace();
            } catch (IOException e) {
                prepared = false;
                e.printStackTrace();
            }
            return prepared;
        }

        @Override
        protected void onPostExecute(Boolean result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            if (progress.isShowing()) {
                progress.cancel();
            }
            Log.d("Prepared", "//" + result);
           // mediaPlayer.start();

            intialStage = false;
        }

        public Player() {
            progress = new ProgressDialog(MainActivity.this);
        }

        @Override
        protected void onPreExecute() {
            // TODO Auto-generated method stub
            super.onPreExecute();
            this.progress.setMessage("Buffering...");
            this.progress.show();

        }
    }

Not work. E/MediaPlayer: error (1, -2147483648) E/MediaPlayer: Error (1,-2147483648) E/MediaPlayer: stop called in state 0 E/MediaPlayer: error (-38, 0)

what can I do? I do not understand what the problem is