如何在Xamarin Android中集成Firebase？找不到配置位置求指导

Hey there! I’ve integrated Firebase into multiple Xamarin Android projects, so I know exactly where you’re stuck—Xamarin handles things a bit differently than native Android, which is why the standard guides don’t line up. Let’s break it down:

1. Handle the google-services.json File #

First, download your google-services.json from the Firebase Console just like you would for native Android. But instead of dropping it into the app folder:

• Place it directly in the root directory of your Xamarin Android project
• Right-click the file → Properties → Set the Build Action to GoogleServicesJson (this is a special Xamarin-specific action that tells the build system to process the file correctly)

2. Install the Right NuGet Packages #

You won’t be editing Gradle files directly for most setups—NuGet packages handle the heavy lifting. Open the NuGet Package Manager for your project and install the Firebase packages you need. Common ones include:

• Xamarin.Firebase.Analytics (for app analytics)
• Xamarin.Firebase.Messaging (for push notifications)
• Xamarin.GooglePlayServices.Base (a required dependency that’s usually installed automatically)

Pro tip: Make sure all Firebase and Google Play Services packages are on the same version—mismatched versions cause weird runtime crashes.

3. Initialize Firebase #

Add the initialization code to either your MainActivity’s OnCreate method or a custom Application class (if you have one):

protected override void OnCreate(Bundle savedInstanceState)
{
    base.OnCreate(savedInstanceState);
    // Initialize Firebase
    FirebaseApp.InitializeApp(this);
    // Your regular activity setup code goes here
}

4. Custom Gradle Config (If Needed) #

Most of the time, you won’t need to touch Gradle manually. But if you do need to add custom configurations (like extra dependencies or plugins):

• Create a build.gradle file in your project’s root directory
• Set its Build Action to GradleBuild
• Add your custom code, for example:

buildscript {
    dependencies {
        classpath 'com.google.gms:google-services:4.3.15'
    }
}
apply plugin: 'com.google.gms.google-services'

Note: The NuGet packages usually inject this plugin automatically, so only add this if you have a specific need.

Common Mistakes to Watch For #

• Incorrect Build Action: If you forget to set google-services.json to GoogleServicesJson, Firebase won’t pick up your project config. Double-check this!
• ProGuard/R8 Conflicts: If you’re using code obfuscation, add these rules to your proguard.cfg file to keep Firebase code intact:

-keep class com.google.firebase.** { *; }
-keep class com.google.android.gms.** { *; }

• Outdated Xamarin.Android Version: Make sure your Xamarin.Android SDK is up to date—older versions might not support the latest Firebase packages.

I’ve used this exact setup for production apps, so it should work smoothly for you. Let me know if you hit any snags!

内容的提问来源于stack exchange，提问作者Amit