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firebase analytics integration issue in .net maui project for android

Ashish Gupta 0 Reputation points
2025-01-06T08:23:10.51+00:00
  • Xamarin.Firebase.Analytics - installed successfuly
  • Xamarin.Firebase.iOS.Analytics - installed successfully

i am trying to integrate firebase analytics in .net maui project but getting some unknown error on android.

Added google-services.json to android project & set build action as googleservicejson and addedGoogleService-Info.plist to iOS project.

working fine on iOS but facing some unknown error on android, please see the code below i have initiallized firebase - 

public class MainActivity : MauiAppCompatActivity

  {
  

  public static Activity FormsContext { get; set; }

  protected override void OnCreate(Bundle savedInstanceState)

  {

      Window.SetStatusBarColor(Color.FromArgb("#FF73B650").ToPlatform());

      CrossFingerprint.SetCurrentActivityResolver(() => this);

      base.OnCreate(savedInstanceState);

      // Initialize Firebase

      FirebaseApp.InitializeApp(this);

  }
  }

however am getting below error please help me to fix this:- 

  /Users/ashishgupta/Projects/CCS_Mobile_Maui/CCS_MOBILE_MAUI/CCSMobile-MAUI/CCSMobile-MAUI: Error JAVA0000: Error in /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.jvm/1.4.5.1/buildTransitive/net8.0-android34.0/../../jar/androidx.collection.collection-jvm.jar:androidx/collection/ArrayMapKt.class:
  
  Type androidx.collection.ArrayMapKt is defined multiple times: /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.jvm/1.4.5.1/buildTransitive/net8.0-android34.0/../../jar/androidx.collection.collection-jvm.jar:androidx/collection/ArrayMapKt.class, /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.ktx/1.2.0.9/buildTransitive/net6.0-android31.0/../../jar/androidx.collection.collection-ktx.jar:androidx/collection/ArrayMapKt.class
  
  Compilation failed
  
  java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.jvm/1.4.5.1/buildTransitive/net8.0-android34.0/../../jar/androidx.collection.collection-jvm.jar
  
  androidx/collection/ArrayMapKt.class
  

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:126)

at com.android.tools.r8.D8.main(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:5)
  Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.jvm/1.4.5.1/buildTransitive/net8.0-android34.0/../../jar/androidx.collection.collection-jvm.jar:androidx/collection/ArrayMapKt.class
  

at Version.fakeStackEntry(Version_8.1.56.java:0)

at com.android.tools.r8.M.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:5)

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:81)

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:32)

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:31)

at com.android.tools.r8.utils.R0.b(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:2)

at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:26)

at com.android.tools.r8.D8.b(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:13)

at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:24)

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:113)

... 1 more
  Caused by: com.android.tools.r8.utils.b: Type androidx.collection.ArrayMapKt is defined multiple times: /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.jvm/1.4.5.1/buildTransitive/net8.0-android34.0/../../jar/androidx.collection.collection-jvm.jar:androidx/collection/ArrayMapKt.class, /Users/ashishgupta/.nuget/packages/xamarin.androidx.collection.ktx/1.2.0.9/buildTransitive/net6.0-android31.0/../../jar/androidx.collection.collection-ktx.jar:androidx/collection/ArrayMapKt.class
  


at com.android.tools.r8.utils.O2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:21)

at com.android.tools.r8.utils.O2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:26)

at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:44)

at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:10)

at java.base/java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:2048)

at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:6)

at com.android.tools.r8.graph.b4$a.e(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:7)

at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:58)

at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:9)

at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:8)

at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:29)

at com.android.tools.r8.D8.d(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:17)

at com.android.tools.r8.D8.c(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:1)

at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:28)

... 6 more
```   (JAVA0000) (CCSMobile-MAUI) java
Developer technologies | .NET | .NET MAUI

2 answers

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  1. Anonymous
    2025-01-07T07:28:08.12+00:00

    Hello,

    Please install Xamarin.AndroidX.Fragment.Ktx nuget package.

    Here is my tested nuget package in MAUI demo, it is working as normal for android platform.

    <ItemGroup Condition="'$(TargetFramework)' == 'net8.0-android'">
  <PackageReference Include="Xamarin.AndroidX.Fragment.Ktx">
      <Version>1.8.5.1</Version>
  </PackageReference>
  <PackageReference Include="Xamarin.Firebase.Analytics">
      <Version>122.1.2.1</Version>
  </PackageReference>
</ItemGroup>

    Best Regards,

    Leon Lu

    If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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  2. Michael Le (WICLOUD CORPORATION) 1,295 Reputation points Microsoft External Staff
    2025-08-21T06:55:03.86+00:00

    Hello,

    The error is triggered by a version mismatch between Xamarin.AndroidX.Collection.Jvm (newer, net8-compatible) and Xamarin.AndroidX.Collection.Ktx (older, typically net6-era). These conflicting dependencies are included simultaneously, likely due to transitive dependencies or outdated package references.

    Recommendation

    • Remove or exclude Xamarin.AndroidX.Collection.Ktx from the Android target.
    • Ensure Xamarin.AndroidX.Collection.Jvm is included and align all AndroidX packages to net8-compatible versions.
    • Verify Firebase Analytics compatibility for Android and iOS.
    • Clean project caches and rebuild.

    Step-by-Step Plan:

    Step 1: Audit Android Dependency Graph

    • Execute the following command to inspect transitive dependencies for the Android target: 
        dotnet list YourProject package --include-transitive --framework net8.0-android
    • Check for Xamarin.AndroidX.Collection.Ktx (e.g., version 1.2.0.9 or similar net6-era packages). If present, proceed to Step 2.

    Step 2: Update Project File to Resolve Dependency Conflict

    • Modify YourProject.csproj to exclude the conflicting Xamarin.AndroidX.Collection.Ktx package and ensure consistent, net8-compatible AndroidX and Firebase dependencies: 
        <ItemGroup Condition="'$(TargetFramework)' == 'net8.0-android'">
    <!-- Exclude conflicting KTX artifact -->
    <PackageReference Update="Xamarin.AndroidX.Collection.Ktx" ExcludeAssets="all" />
    <!-- Include JVM artifact for androidx.collection -->
    <PackageReference Include="Xamarin.AndroidX.Collection.Jvm" Version="1.4.5.1" />
    <!-- Align AndroidX dependencies to net8-compatible versions -->
    <PackageReference Include="Xamarin.AndroidX.Core" Version="1.13.1.3" />
    <PackageReference Include="Xamarin.AndroidX.AppCompat" Version="1.7.0.3" />
    <PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Version="1.9.3.1" />
    <PackageReference Include="Xamarin.AndroidX.Fragment.Ktx" Version="1.8.5.1" />
    <!-- Firebase Analytics for Android -->
    <PackageReference Include="Xamarin.Firebase.Analytics" Version="122.1.2.1" />
    <!-- Include google-services.json -->
    <GoogleServicesJson Include="Platforms/Android/google-services.json" />
  </ItemGroup>
  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0-ios'">
    <!-- Firebase Analytics for iOS -->
    <PackageReference Include="Xamarin.Firebase.iOS.Analytics" Version="10.28.0.1" />
  </ItemGroup>

    Step 3: Verify google-services.json Configuration

    • Ensure Platforms/Android/google-services.json is present and correctly configured.
    • Set its Build Action to GoogleServicesJson in the project file (as shown above).

    Step 4: Clean and Rebuild Project

    • Close your IDE.
    • Clear NuGet caches and project artifacts by running: 
        dotnet nuget locals all --clear
    • Delete bin and obj directories in the project folder.
    • Restore and rebuild the project: 
        dotnet restore
  dotnet build -c Debug

    Step 5: Validate Firebase Analytics Initialization

    • Confirm Firebase initialization in MainActivity.cs and test an analytics event: 
        protected override void OnCreate(Bundle savedInstanceState)
  {
      base.OnCreate(savedInstanceState);
      // Initialize Firebase
      Firebase.FirebaseApp.InitializeApp(this);
      // Test Analytics
      var analytics = Firebase.Analytics.FirebaseAnalytics.GetInstance(Android.App.Application.Context);
      var bundle = new Android.OS.Bundle();
      bundle.PutString(Firebase.Analytics.Param.Method, "app_start");
      analytics.LogEvent(Firebase.Analytics.Event.Login, bundle);
  }

    Step 6: Ensure Consistent Target Framework

    • Verify that YourProject.csproj targets net8.0-android for Android builds and contains no references to net6.0-android or older AndroidX packages.
    • Ensure all AndroidX dependencies are aligned to a consistent version family to prevent similar conflicts.

    I hope this helps you resolve the issue.

    References

    You could use the following resources for further information:

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