Unable to load font 'monospace'

[tranb3r]

Description

I'm using the 'monospace' font in my xamarin forms app.
When migrating to maui, it looks like it does not work anymore

Steps to Reproduce

1. Create a maui app for android
2. Create a label using the 'monospace' font
3. Run the app

<Label FontFamily="monospace" Text="Hello world" />

Link to public reproduction project repository

...

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

...

Did you find any workaround?

No response

Relevant log output

[Microsoft.Maui.FontManager] [Warning] Unable to load font 'monospace' from assets.Java.Lang.RuntimeException: Font asset not found monospace
[Microsoft.Maui.FontManager]    at Java.Interop.JniEnvironment.StaticMethods.CallStaticObjectMethod(JniObjectReference type, JniMethodInfo method, JniArgumentValue* args) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop/Java.Interop/JniEnvironment.g.cs:line 12890
[Microsoft.Maui.FontManager]    at Java.Interop.JniPeerMembers.JniStaticMethods.InvokeObjectMethod(String encodedMember, JniArgumentValue* parameters) in /Users/runner/work/1/s/xamarin-android/external/Java.Interop/src/Java.Interop/Java.Interop/JniPeerMembers.JniStaticMethods.cs:line 95
[Microsoft.Maui.FontManager]    at Android.Graphics.Typeface.CreateFromAsset(AssetManager mgr, String path) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/net6.0/android-33/mcw/Android.Graphics.Typeface.cs:line 613
[Microsoft.Maui.FontManager]    at Microsoft.Maui.FontManager.LoadTypefaceFromAsset(String fontfamily, Boolean warning) in D:\a\_work\1\s\src\Core\src\Fonts\FontManager.Android.cs:line 122
[Microsoft.Maui.FontManager]   --- End of managed Java.Lang.RuntimeException stack trace ---
[Microsoft.Maui.FontManager] java.lang.RuntimeException: Font asset not found monospace
[Microsoft.Maui.FontManager] 	at android.graphics.Typeface.createFromAsset(Typeface.java:1044)
[Microsoft.Maui.FontManager] 	at crc6452ffdc5b34af3a0f.NavigationViewFragment.n_onCreateView(Native Method)
[Microsoft.Maui.FontManager] 	at crc6452ffdc5b34af3a0f.NavigationViewFragment.onCreateView(NavigationViewFragment.java:39)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2995)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:523)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1840)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1764)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1701)
[Microsoft.Maui.FontManager] 	at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:488)
[Microsoft.Maui.FontManager] 	at android.os.Handler.handleCallback(Handler.java:942)
[Microsoft.Maui.FontManager] 	at android.os.Handler.dispatchMessage(Handler.java:99)
[Microsoft.Maui.FontManager] 	at android.os.Looper.loopOnce(Looper.java:201)
[Microsoft.Maui.FontManager] 	at android.os.Looper.loop(Looper.java:288)
[Microsoft.Maui.FontManager] 	at android.app.ActivityThread.main(ActivityThread.java:7898)
[Microsoft.Maui.FontManager] 	at java.lang.reflect.Method.invoke(Native Method)
[Microsoft.Maui.FontManager] 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
[Microsoft.Maui.FontManager] 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

[jsuarezruiz]

Are you trying in a specific device or also emulators?

[tranb3r]

Emulator for now

[ehoward0018]

Happening on Windows 10 as well:

`Microsoft.Maui.FontRegistrar: Warning: Unable to load font 'Roboto'.

System.IO.FileNotFoundException: Native font with the name Roboto-Black.tff was not found.
at Microsoft.Maui.FontRegistrar.LoadNativeAppFont(String font, String filename, String alias)
at Microsoft.Maui.FontRegistrar.GetFont(String font)`

[ghost]

Hi @tranb3r. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[ehoward0018]

This happens to the base .net MAUI 7 project. Add any font to the base fonts folder, add it to the MauiProgram.cs file and it fails.

[tranb3r]

Here is a repro : https://github.com/tranb3r/Issues/tree/main/MauiAppFontMonospace
Please note that there is an exception, but the label is actually displayed correctly with the correct font.

[jsuarezruiz]

Here is a repro : https://github.com/tranb3r/Issues/tree/main/MauiAppFontMonospace
Please note that there is an exception, but the label is actually displayed correctly with the correct font.

Could you share the Exception StackTrace?

[ghost]

Hi @tranb3r. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[tranb3r]

@jsuarezruiz The stack trace is in the description of this issue.