xamarin/Xamarin.Forms

[Bug] {StaticResource MyBackgroundColor} format BackgroundColor property doesn't work with Shell in Android

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#7,055 opened on Aug 2, 2019

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a/shell :shell:e/3 :clock3:help wantedp/Androidp/iOS 🍎t/bug :bug:up-for-grabs

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Description

Description

I set {StaticResource MyBackgroundColor} to BackgroundColor property of Shell. But it not applied navigation bar and bottom tabbar in Android. Green (or Red etc) does work fine.

Steps to Reproduce

  1. Create a Xamarin.Forms Shell project
  2. Write a color resource to App.xaml
  3. Add the color resource to BackgroundColor property of Shell in AppShell.xaml

Expected Behavior

{StaticResource MyBackgroundColor} is applied to navigation bar and bottom tabbar.

Actual Behavior

Color of navigation bar and bottom tabbar is not changed with {StaticResource MyBackgroundColor}.

Basic Information

  • Version with issue: Xamarin.Forms 4.1.0.618606, Android emulator API 28
  • IDE: Visual Studio 2019 16.2.0 Windows 10
  • Platform Target Frameworks:
    • Android: API 28
  • Android Support Library Version: Default (v4 and v7)

Screenshots

ShellBackgroundWithLiteral ShellBackgroundWithStaticResource

Contributor guide

Research direction
Investigate how Xamarin.Forms resolves StaticResource for Shell's BackgroundColor on Android; compare with direct color strings. Look into ShellRenderer and relevant platform handlers.
Tech stack
csharp
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#Xamarin.FormsAndroid
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40