private void ShowPlayNote(int playId)
        {
            selectedPlayId = playId;
            if (showingTwoFragments)
            {
                ListView.SetItemChecked(selectedPlayId, true);

                var playNoteFragment = FragmentManager.FindFragmentById(Resource.Id.playnote_container)
                                       as PlayNoteFragment;

                if (playNoteFragment == null || playNoteFragment.PlayId != playId)
                {
                    var container = Activity.FindViewById(Resource.Id.playnote_container);
                    var noteFrag  = PlayNoteFragment.NewInstance(selectedPlayId);

                    FragmentTransaction ft = FragmentManager.BeginTransaction();

                    ft.Replace(Resource.Id.playnote_container, noteFrag);
                    ft.Commit();
                }
            }

            else
            {
                var intent = new Intent(Activity, typeof(PlayNoteActivity));
                intent.PutExtra("current_play_id", playId);
                StartActivity(intent);
            }
        }
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            if (Resources.Configuration.Orientation == Android.Content.Res.Orientation.Landscape)
            {
                Finish();
            }

            PlayId = Intent.Extras.GetInt("current_play_id", 0);

            var playNoteFrag = PlayNoteFragment.NewInstance(PlayId);

            FragmentManager.BeginTransaction()
            .Add(Android.Resource.Id.Content, playNoteFrag)
            .Commit();
        }