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[Bug] BoxView Color in CollectionView DataTemplate ignored if Corner Radius is set (Android only) #14970

Open BenBtg opened 2 years ago

BenBtg commented 2 years ago

Description

This is a repro for a customer raised issue. Repro using the CollectionView Sample app.

Steps to Reproduce

  1. Open collection view Sample app.
  2. Add a BoxView to the Horizontal list sample so it overlays each item.
  3. Set background to transparent
  4. Run app an notice BoxView is invisible.
  5. Set corner radius to 10
  6. Run app and notice BoxView is now white.
  7. Change Corner Radius value and HotReload
  8. BoxView now changes to Black.

Example DataTemplate

                <DataTemplate>
                    <Grid Padding="10" ColumnDefinitions="70, 140" RowDefinitions="35, 35" BackgroundColor="Black">
                        <Image Grid.RowSpan="2" 
                               Source="{Binding ImageUrl}" 
                               Aspect="AspectFill"
                               HeightRequest="60" 
                               WidthRequest="60" />
                        <Label Grid.Column="1" 
                               Text="{Binding Name}" 
                               FontAttributes="Bold"
                               LineBreakMode="TailTruncation" />
                        <Label Grid.Row="1"
                               TextColor="White"
                               Grid.Column="1" 
                               Text="{Binding Location}"
                               LineBreakMode="TailTruncation"
                               FontAttributes="Italic" 
                               VerticalOptions="End" />
                        <BoxView BackgroundColor="Transparent" HeightRequest="50" WidthRequest="50" CornerRadius="10" />

Expected Behavior

BoxView color does not change when setting or changing CornerRadius

Actual Behavior

BoxView Color is White or Black depending on if it is changed during HotReload

Basic Information

Environment

Show/Hide Visual Studio info Microsoft Visual Studio Enterprise 2019 Version 16.11.7 VisualStudio.16.Release/16.11.7+31911.196 Microsoft .NET Framework Version 4.8.04161 Installed Version: Enterprise Visual C++ 2019 00435-60000-00000-AA337 Microsoft Visual C++ 2019 ADL Tools Service Provider 1.0 This package contains services used by Data Lake tools ASA Service Provider 1.0 ASP.NET and Web Tools 2019 16.11.94.52318 ASP.NET and Web Tools 2019 ASP.NET Core Blazor Language Services 16.0.19307.2 ASP.NET Web Frameworks and Tools 2019 16.11.94.52318 For additional information, visit https://www.asp.net/ Azure App Service Tools v3.0.0 16.11.94.52318 Azure App Service Tools v3.0.0 Azure Data Lake Node 1.0 This package contains the Data Lake integration nodes for Server Explorer. 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Node.js Tools 1.5.30526.3 Commit Hash:c09c81113bcbc86d57943fcdd67e82434263d61d Adds support for developing and debugging Node.js apps in Visual Studio NuGet Package Manager 5.11.0 NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/ ProjectServicesPackage Extension 1.0 ProjectServicesPackage Visual Studio Extension Detailed Info Python 16.11.21196.2 Provides IntelliSense, projects, templates, debugging, interactive windows, and other support for Python developers. Python - Conda support 16.11.21196.2 Conda support for Python projects. Python - Django support 16.11.21196.2 Provides templates and integration for the Django web framework. Python - Profiling support 16.11.21196.2 Profiling support for Python projects. Razor (ASP.NET Core) 16.1.0.2122504+13c05c96ea6bdbe550bd88b0bf6cdddf8cde1725 Provides languages services for ASP.NET Core Razor. Snapshot Debugging Extension 1.0 Snapshot Debugging Visual Studio Extension Detailed Info Snippet Designer 1.8.1 Snippet Designer is a Visual Studio plug in which allows you to create and search for snippets inside the IDE SQL Server Data Tools 16.0.62111.11070 Microsoft SQL Server Data Tools Syncfusion Xamarin Project Templates 13.4.0.53 A multi-project template for building iOS, Android, and Windows apps using Syncfusion Xamarin components. Syncfusion Xamarin Toolbox 16.2.0.19 Syncfusion Essential Studio for Xamarin Toolbox Visual Studio extension. SyncfusionMenu Extension 1.0 SyncfusionMenu Visual Studio Extension Detailed Info ToolWindowHostedEditor 1.0 Hosting json editor into a tool window TypeScript Tools 16.0.30526.2002 TypeScript Tools for Microsoft Visual Studio Visual Basic Tools 3.11.0-4.21403.6+ae1fff344d46976624e68ae17164e0607ab68b10 Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used. 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Screenshots

image

Reproduction Link

ReproLink

Workaround

Customer is currently setting Transparency to 0.1 as a workaround. Looking into using Shapes as preferable alternative.

irongut commented 2 years ago

I've had the same problem for some time. I use a semi-transparent BoxView over an image to darken the image. I thought the problem was with BoxView transparency but after finding this issue and removing the CornerRadius from my BoxView it works again.

boxview-issue

This problem first occurred when I upgraded from Xamarin.Forms 5.0.0.2012 to Xamarin.Forms 5.0.0.2083 and is still present in the latest release (5.0.0.2337).

Last known good version: Xamarin.Forms 5.0.0.2012

jcmanke commented 1 year ago

Still present in 5.0.0.2478. Worked around by changing to Ellipse.