Android mediacontroller Play Pause controls not refresh properly

I have used MediaController in my activity its working fine but when I play video for first time then there should b pause button visible but instead there is play and when I press that button then the video is paused correctly and state remains the same and after that its working properly. And same thing happens when Video Completed. Is this a bug or I am doing any thing wrong?

videoView.setOnPreparedListener(new OnPreparedListener() {
    @Override
    public void onPrepared(MediaPlayer mp) {
            mediaController = new MediaController(VideoPlayerActivity.this){
        public void hide(){
        }
        public void show(){
            if(isPlayingAd){
                super.hide();
            }else{
                super.show();
            }
        }
    };
    videoView.setMediaController(mediaController);
    mediaController.setMediaPlayer(videoView);
    mediaController.show();
    }
});