if-else block not executable

I'm working on an App that streams audio from firebase, which is functioning properly for play but else block for pause not working and I tried debugging it with breakpoints which debugged with the message no executable code found at line....

public void playSong(List<MemberAudio> arrayListAudio, int adapterPosition) throws IOException {
        MemberAudio memberAudio = arrayListAudio.get(adapterPosition);

        if (mediaPlayer != null) {
            mediaPlayer.stop();
            mediaPlayer.release();
            mediaPlayer = null;
        }

        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDataSource(memberAudio.getAudioUri());
        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                if (!mp.isPlaying()) {
                    mp.start();
                    Toast.makeText(ShowAudio.this, "play", Toast.LENGTH_SHORT).show();
                } else if (mp.isPlaying()) {
                    mp.pause();
                    Toast.makeText(ShowAudio.this, "pause", Toast.LENGTH_SHORT).show();
                }//at this line code is not executable
            }
        });//at this line code is not executable

        mediaPlayer.prepareAsync();
    }