Load a theme at runtime - Codeblock throws exception

[funnelshift]

Type of issue

Outdated article

Description

By following this codeblock, this will result into an exception (Android.Runtime.JavaProxyThrowable).
The codeblock shows you only the remove ALL merged dictionaries, which means also the dictionaries MAUI needs and than add your own.
This means that you need to copy all the contents of Styles.xaml and Colors.xaml and put that into your own ResourceDictionary.
MAUI has two ResourceDictionaries and when those are removed the app just crashes.
A better approach would be to use .Remove(MyTheme) instead of .Clear().

Page URL

https://learn.microsoft.com/en-us/dotnet/maui/user-interface/theming?view=net-maui-11.0#consume-theme-resources

Content source URL

https://github.com/dotnet/docs-maui/blob/main/docs/user-interface/theming.md

Document Version Independent Id

04d29bb3-0ea9-e42a-d6d2-cf338baca362

Platform Id

321f7c7a-4f7e-1852-0cd1-22dd46f55484

Article author

@davidortinau

Metadata

• ID: 04d29bb3-0ea9-e42a-d6d2-cf338baca362
• PlatformId: 321f7c7a-4f7e-1852-0cd1-22dd46f55484
• Service: dotnet-mobile-development
• Sub-service: dotnet-maui

Related Issues

[jfversluis]

@funnelshift I opened #3470 with a proposed fix that removes only the active theme dictionary instead of clearing all merged dictionaries. Could you confirm whether this is sufficient for the scenario you reported?

[funnelshift]

@jfversluis I looked through it and looks good to me. I'll close this one up.