mCurrentPosition = mediaPlayer.getCurrentPosition()/1000; // In milliseconds

protected void initializeSeekBar(){
    mSeekBar.setMax(mediaPlayer.getDuration()/1000);

    mRunnable = new Runnable() {
        @Override
        public void run() {
            int mCurrentPosition;
            if(mediaPlayer!=null && mediaPlayer.isPlaying()){
                mCurrentPosition = mediaPlayer.getCurrentPosition()/1000; // In milliseconds
            }
            else    {
                mCurrentPosition = 0;
            }

            if (mSeekBar != null)   {
                mSeekBar.setProgress(mCurrentPosition);
                getAudioStats();
            }
            handler.postDelayed(mRunnable,1000);
        }
    };
    handler.postDelayed(mRunnable,1000);
}

mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                getAudioStats();
                initializeSeekBar();

                if(mediaPlayer != null && fromUser) {
                    mediaPlayer.seekTo(progress * 1000);
                }


            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

protected void getAudioStats(){
        long duration  = mediaPlayer.getDuration()/1000; // In milliseconds
        long due = (mediaPlayer.getDuration() - mediaPlayer.getCurrentPosition())/1000;
        long pass = duration - due;

        String test = DateUtils.formatElapsedTime(pass);
        String test1 = DateUtils.formatElapsedTime(due);

        current_time.setText("" + test);
        //mDuration.setText("" + duration + " seconds");
        total_time.setText("" + test1);
    }

handler.removeCallbacks(mRunnable);

handler.postDelayed(mRunnable,1000);

if (!isDestroyed()) {
    handler.postDelayed(mRunnable,1000);
}

protected void initializeSeekBar(){
    if (mRunnable != null) {
        handler.removeCallbacks(mRunnable);
    }
    // ... the rest of the method that you currently have