protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            SetContentView(Resource.Layout.website_image_view);

            vPager = FindViewById <ViewPager>(Resource.Id.viewPager);



            pAdapter = new P_Ad()
            {
                context = this, parent = this
            };                                                      //new PageAdapter(SupportFragmentManager);
            vPager.OffscreenPageLimit = 0;
            pAdapter.albumImages      = ((IBigImageCollectionHolder)currentWebPage).AlbumImages;
            vPager.Adapter            = pAdapter;
            vPager.CurrentItem        = currenItemPosition;
            vPager.AddOnPageChangeListener((ViewPager.IOnPageChangeListener)pAdapter);
        }
        public override void OnBackPressed()
        {
            //Picasso.With(this).CancelTag(pAdapter);
            vPager.RemoveAllViews();
            vPager   = null;
            pAdapter = null;

            memoryCache.ClearBigImages();

            Android.Util.Log.Debug("WebsiteImageViewActivity",
                                   $"Request Packet ={MyGlobal.requestPacketCount}, History Obj ={MyGlobal.historyObjCount}");

            currentState = currentState - 1;

            Intent intent = new Intent();

            intent.PutExtra("IsDataChange", isDataChanged);
            SetResult(Android.App.Result.Ok, intent);

            Finish();

            base.OnBackPressed();
        }