I am trying to integrate Firebase Analytics and Crashlytics into a .NET MAUI (.NET 10) Android application, but I am facing a runtime exception related to Crashlytics.

Question

I am trying to integrate Firebase Analytics and Crashlytics into a .NET MAUI (.NET 10) Android application, but I am facing a runtime exception related to Crashlytics.

Vignesh Palthurai 0

Steps I followed:

Created a new .NET MAUI project

Created a Firebase project and added an Android app

Ensured the ApplicationId matches the package name

Added google-services.json to: Platforms/Android/google-services.json

Set Build Action to GoogleServicesJson

Installed the following NuGet packages:

Plugin.Firebase
Plugin.Firebase.Analytics

Plugin.Firebase.Crashlytics
Configuration:

ApplicationId in .csproj: com.companyname.firebasepocapp

Package name in AndroidManifest.xml: com.companyname.firebasepocapp

Error:

At runtime, I get the following exception:
Java.Lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.IllegalStateException: The Crashlytics build ID is missing.
What I have tried:

Verified google-services.json placement and build action

Ensured package names match

Cleaned and rebuilt the solution

Questions:

Is additional Android Gradle configuration required for Crashlytics in .NET MAUI (.NET 10)?

Does Plugin.Firebase fully support Crashlytics for .NET 10?

Is there any required initialization code or setup missing for Analytics and Crashlytics?

Any guidance or working setup example would be helpful.

Environment:

.NET MAUI (.NET 10)

Android target

Visual Studio 2026

Plugin.Firebase (latest available version)

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1 answer

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Answer 1

Nancy Vo (WICLOUD CORPORATION) 1,985 Microsoft External Staff Moderator

Hi @Vignesh Palthurai ,

Thanks for your question.

In a normal Android app, Google’s Gradle tools automatically create that badge (the "build ID").

But in .NET MAUI, we’re not using normal Gradle, we use the Plugin.Firebase wrapper. The plugin brings in the real Crashlytics detective, but it doesn’t automatically create the badge.

I recommend some following steps:

Create (or open) the strings.xml file.

Go to this exact folder in your MAUI project: Platforms/Android/Resources/values/

Inside that folder, create a new file called strings.xml (if it doesn’t already exist).

Then, put this content inside strings.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="com.google.firebase.crashlytics.mapping_file_id">none</string>
    <!-- Optional safety line -->
    <string name="com.crashlytics.android.build_id">1.0</string>
</resources>

Set the Build Action correctly

Right-click the strings.xml file in Solution Explorer.
Choose Properties.
Set Build Action to AndroidResource (very important!).

Clean + Rebuild + Run Clean the solution → Rebuild → Run on Android device/emulator.

Make sure you initialize Firebase and enable Crashlytics in MauiProgram.cs. Add this code before builder.Build():

// Check Plugin.Firebase docs for the exact method in your version.
builder.ConfigureFirebase();

CrossFirebaseCrashlytics.Current.SetCrashlyticsCollectionEnabled(true);

If ConfigureFirebase() is not available, you can also try:

CrossFirebase.Initialize();

I hope this addresses your question. If this response was helpful, please consider following the guidance to provide feedback.

Vignesh Palthurai 0 Reputation points

2026-04-07T10:08:31.1833333+00:00
Hi @Nancy Vo (WICLOUD CORPORATION) ,

Thank you for your guidance.

I followed all the suggested steps:

Created the strings.xml file under Platforms/Android/Resources/values/

Added the required entries:

<string name="com.google.firebase.crashlytics.mapping_file_id">none</string> <string name="com.crashlytics.android.build_id">1.0</string>

Set the Build Action to AndroidResource

Cleaned and rebuilt the solution

Package Installation

Initially, I tried using the latest versions of all Plugin.Firebase packages. However, that resulted in errors during initialization.

So I removed everything and reinstalled all packages with the same version (4.0.0) using terminal:

dotnet add package Plugin.Firebase --version 4.0.0 dotnet add package Plugin.Firebase.Analytics --version 4.0.0 dotnet add package Plugin.Firebase.Crashlytics --version 4.0.0

I verified that all packages are now aligned to version 4.0.0.

Issue 1

When I use:

CrossFirebase.Initialize();

I get:

The name 'CrossFirebase' does not exist in the current context

Issue 2

When I try:

builder.ConfigureFirebase();

I get:

'MauiAppBuilder' does not contain a definition for 'ConfigureFirebase'

At this point, I have tried both initialization approaches:

CrossFirebase.Initialize() (older method)

builder.ConfigureFirebase() (newer method)

…but neither is working in my setup, even after aligning all package versions.

Clarification Needed

Could you please help clarify:

What is the correct initialization method for Plugin.Firebase version 4.0.0 in .NET MAUI?

Is there any additional configuration required that I might be missing?

If possible, could you share a minimal working example for this setup?

Additionally, my project is currently targeting .NET MAUI (net10.0-android).

From my understanding, .NET MAUI 10 is relatively new, and since Plugin.Firebase is a community-maintained library, there may be compatibility limitations or delays in full support for newer MAUI versions.

This might be a possible reason why neither CrossFirebase.Initialize() nor builder.ConfigureFirebase() is being recognized in my project.

Thanks in advance for your support !

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I am trying to integrate Firebase Analytics and Crashlytics into a .NET MAUI (.NET 10) Android application, but I am facing a runtime exception related to Crashlytics.

Error:

Questions:

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Package Installation

Issue 1

Issue 2

Clarification Needed

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