void CreateRecyclerView()
{
_recyclerView = new ScrollRecyclerView(Android.App.Application.Context);
_recyclerView.Touch += _recyclerView_Touch;
var scrollListener = new GridViewScrollListener(Element, _recyclerView);
_recyclerView.AddOnScrollListener(scrollListener);
if (Element.IsHorizontal)
{
var linearLayoutManager = new LinearLayoutManager(Context, OrientationHelper.Horizontal, false);
_layoutManager = linearLayoutManager;
}
else
{
var gridlayoutManager = new GridLayoutManager(Context, 1);
_layoutManager = gridlayoutManager;
}
_recyclerView.SetLayoutManager(_layoutManager);
_recyclerView.SetItemAnimator(null);
_recyclerView.HasFixedSize = true;
_recyclerView.HorizontalScrollBarEnabled = Element.IsHorizontal;
_recyclerView.VerticalScrollBarEnabled = !Element.IsHorizontal;
_adapter = new GridViewAdapter(Element.ItemsSource, _recyclerView, Element, Resources.DisplayMetrics);
_recyclerView.SetAdapter(_adapter);
UpdatePadding();
}
/// <summary>
/// Called when [element changed].
/// </summary>
/// <param name="e">The e.</param>
protected override void OnElementChanged(ElementChangedEventArgs <GridView> e)
{
base.OnElementChanged(e);
var context = Xamarin.Forms.Forms.Context;
var collectionView = new Android.Widget.GridView(context);
collectionView.SetGravity(GravityFlags.Center);
collectionView.SetColumnWidth(Convert.ToInt32(Element.ItemWidth));
collectionView.StretchMode = StretchMode.StretchColumnWidth;
var metrics = Resources.DisplayMetrics;
var spacing = (int)e.NewElement.ColumnSpacing;
var width = metrics.WidthPixels;
var itemWidth = (int)e.NewElement.ItemWidth;
int noOfColumns = width / (itemWidth + spacing);
// If possible add another row without spacing (because the number of columns will be one less than the number of spacings)
if (width - (noOfColumns * (itemWidth + spacing)) >= itemWidth)
{
noOfColumns++;
}
collectionView.SetNumColumns(noOfColumns);
collectionView.SetPadding(Convert.ToInt32(Element.Padding.Left), Convert.ToInt32(Element.Padding.Top), Convert.ToInt32(Element.Padding.Right), Convert.ToInt32(Element.Padding.Bottom));
collectionView.SetBackgroundColor(Element.BackgroundColor.ToAndroid());
collectionView.SetHorizontalSpacing(Convert.ToInt32(Element.RowSpacing));
collectionView.SetVerticalSpacing(Convert.ToInt32(Element.ColumnSpacing));
this.Unbind(e.OldElement);
this.Bind(e.NewElement);
_adapter = new GridViewAdapter(context, collectionView, Element);
collectionView.Adapter = _adapter;
collectionView.ItemClick += CollectionViewItemClick;
base.SetNativeControl(collectionView);
}
