Java.Lang.OutOfMemoryError on Android about sharpnado.shadows

[roubachof]

Yup, don't put shadows around a layout that is 12000 pixels height, you will end up with a Bitmap of 12000 pixels, and you know what will happen x)

[roubachof]

as a workaround, if you are only interested by a bottom shadow for example, put a smaller transparent ContentView (maybe 50dp height) at the bottom of your layout, underneath your very looooong view, and add the shadow to this ContentView.

[piotrbalut]

I didn't put shadows around a layout that is 12000 pixels. The container with shadows has circa 150px. Main problem is in situation when Expander is expanded, because there are 2000px.

It looks like this:

<StackLayout>
	<ScrollView>
		<StackLayout BindableLayout.ItemsSource="{Binding Items}" VerticalOptions="FillAndExpand" Margin="0">
			<BindableLayout.ItemTemplate>
				<DataTemplate>
					<StackLayout>
						<Label Text="{Binding IsLast}" x:Name="IsLast" IsVisible="False" />
						<AbsoluteLayout VerticalOptions="FillAndExpand"
												                HorizontalOptions="FillAndExpand">
							<shades:Shadows AbsoluteLayout.LayoutBounds="0,0,1,1"  AbsoluteLayout.LayoutFlags="All" CornerRadius="1">
								<Frame HasShadow="False" CornerRadius="8">
									<controls:CommandExpander Expanded="{Binding Path=IsExpanded, Mode=TwoWay}">
										<views:Expander.Header>
											<StackLayout Orientation="Horizontal">
												<!--MY CONTENT-->
											</StackLayout>
										</views:Expander.Header>
									</controls:CommandExpander>
								</Frame>
							</shades:Shadows>

							<BoxView AbsoluteLayout.LayoutBounds="0,0,2,10">
							</BoxView>
						</AbsoluteLayout>
					</StackLayout>
				</DataTemplate>
			</BindableLayout.ItemTemplate>
		</StackLayout>
	</ScrollView>
</StackLayout>

[roubachof]

well 2000px bitmap is hitting OutOfMemory on your device, so it's the same issue.
same workaround apply.
Wrap a ContentView with Shadows, put it before your CommandExpander and at the end of your AbsoluteLayout, make is smaller, like
AbsoluteLayout.LayoutBounds="0,1,1,50" AbsoluteLayout.LayoutFlags="Positional,WidthProportional"

[piotrbalut]

I don't understand how it make smaller. Look, my current view looks like this, when all expanders aren't expanded.

It's (shaddow effect) possible because my frame is in shadow view. Do you suggest add shaddows on the top and the bottom of
CommandExpander? This solution will remove frame effect with corners.

Could you explain your idea?

[roubachof]

Then just put a Shadows around each expander's header instead of the whole command expander.
Since Shadows caches the bitmaps, it will only use one small bitmap instead of a giant one, and you will have a nicer effect.

[piotrbalut]

It's solution. I put Shadows only around expander header instead of all expander.