Fix MAUI missing breadcrumbs for lifecycle and UI events

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- Fix MAUI missing breadcrumbs for lifecycle and UI events ([#2170](https://github.com/getsentry/sentry-dotnet/pull/2170))
+
 ## 3.28.0
 
 ### Features

src/Sentry.Maui/SentryMauiAppBuilderExtensions.cs

@@ -3,6 +3,7 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Microsoft.Maui.LifecycleEvents;
+using Sentry.Extensibility;
 using Sentry.Extensions.Logging;
 using Sentry.Extensions.Logging.Extensions.DependencyInjection;
 using Sentry.Maui;
@@ -102,14 +103,22 @@ private static void RegisterMauiEventsBinder(this MauiAppBuilder builder)
 
     private static void BindMauiEvents(this IPlatformApplication platformApplication)
     {
-        // Bind to the MAUI application events in a real application control,
-        // because the required events are not present on the interfaces.
-        if (platformApplication.Application is not Application application)
+        // We need to resolve the application manually, because it's not necessarily
+        // set on platformApplication.Application at this point in the lifecycle.
+        var services = platformApplication.Services;
+        var app = services.GetService<IApplication>();
+
+        // Use a real Application control, because the required events needed for binding
+        // are not present on IApplication and related interfaces.
+        if (app is not Application application)
         {
+            var options = services.GetService<IOptions<SentryMauiOptions>>()?.Value;
+            options?.LogWarning("Could not bind to MAUI events!");
             return;
         }
 
-        var binder = platformApplication.Services.GetRequiredService<IMauiEventsBinder>();
+        // Bind the events
+        var binder = services.GetRequiredService<IMauiEventsBinder>();
         binder.BindApplicationEvents(application);
     }
 }

test/Sentry.Maui.Tests/SentryMauiAppBuilderExtensionsTests.Android.cs

@@ -10,14 +10,15 @@ public partial class SentryMauiAppBuilderExtensionsTests
     public void UseSentry_BindsToApplicationStartupEvent_Android()
     {
         // Arrange
+        var application = MockApplication.Create();
         var binder = Substitute.For<IMauiEventsBinder>();
 
         var builder = _fixture.Builder;
+        builder.Services.AddSingleton<IApplication>(application);
         builder.Services.AddSingleton(binder);
         builder.UseSentry(ValidDsn);
         using var app = builder.Build();
 
-        var application = MockApplication.Create();
         var androidApplication = new MockAndroidApplication(application, app.Services);
 
         // Act

test/Sentry.Maui.Tests/SentryMauiAppBuilderExtensionsTests.iOS.cs

@@ -11,14 +11,15 @@ public partial class SentryMauiAppBuilderExtensionsTests
     public void UseSentry_BindsToApplicationStartupEvent_iOS()
     {
         // Arrange
+        var application = MockApplication.Create();
         var binder = Substitute.For<IMauiEventsBinder>();
 
         var builder = _fixture.Builder;
+        builder.Services.AddSingleton<IApplication>(application);
         builder.Services.AddSingleton(binder);
         builder.UseSentry(ValidDsn);
         using var app = builder.Build();
 
-        var application = MockApplication.Create();
         var iosApplication = new MockIosApplication(application, app.Services);
 
         // A bit of hackery here, because we can't mock UIKit.UIApplication.