This troubleshooting guide will help you resolve the "Local module descriptor class not found for com.google.firebase:firebase-auth" issue you might encounter when working with Firebase Authentication in your Android projects. Follow the step-by-step instructions below to fix the problem and get your project running smoothly.

Table of Contents

• Step 1: Check Your Firebase Project Configuration
• Step 2: Verify Your Google Services Plugin Version
• Step 3: Update Your Firebase Authentication Dependencies
• Step 4: Sync Your Gradle Files
• Step 5: Clean and Rebuild Your Project
• FAQ

Step 1: Check Your Firebase Project Configuration

Check your google-services.json file

Ensure you have correctly added the google-services.json file to your Android project. This file is generated when you add your app to your Firebase project on the Firebase Console. Make sure it is placed in the app directory of your project.

Add the Firebase SDK

Make sure you have added the required Firebase SDK dependencies to your project-level and app-level build.gradle files.

In your project-level build.gradle file, ensure you have the following lines:

buildscript {
    repositories {
        // ...
        google()
    }
    dependencies {
        // ...
        classpath 'com.google.gms:google-services:4.3.10' // Check for the latest version
    }
}

In your app-level build.gradle file, ensure you have:

dependencies {
    // ...
    implementation platform('com.google.firebase:firebase-bom:28.4.2') // Check for the latest version
    implementation 'com.google.firebase:firebase-auth'
}

// ...

apply plugin: 'com.google.gms.google-services'

Source

Step 2: Verify Your Google Services Plugin Version

Check the version of the Google Services plugin in your project-level build.gradle file. Update the version if necessary:

buildscript {
    dependencies {
        // ...
        classpath 'com.google.gms:google-services:4.3.10' // Check for the latest version
    }
}

You can find the latest version of the Google Services plugin on the Google Services Plugin Github repository.

Step 3: Update Your Firebase Authentication Dependencies

Update your Firebase Authentication dependencies to the latest version. In your app-level build.gradle file, make sure you have the following:

dependencies {
    // ...
    implementation platform('com.google.firebase:firebase-bom:28.4.2') // Check for the latest version
    implementation 'com.google.firebase:firebase-auth'
}

You can find the latest version of the Firebase Bill of Materials (BoM) on the Firebase Android SDK Github repository.

Step 4: Sync Your Gradle Files

After updating your dependencies, sync your Gradle files by clicking on "Sync Now" in the top right corner of Android Studio or by selecting "File" > "Sync Project with Gradle Files" from the menu.

Step 5: Clean and Rebuild Your Project

In Android Studio, select "Build" > "Clean Project" from the menu. After the cleaning process is complete, select "Build" > "Rebuild Project" from the menu.

FAQ

Q1: How do I add Firebase to my Android project?

To add Firebase to your Android project, follow the steps mentioned in the official Firebase documentation.

Q2: How do I update my Firebase dependencies?

To update your Firebase dependencies, modify the version numbers of the respective dependencies in your app-level build.gradle file and sync your Gradle files.

Q3: How do I find the latest version of the Firebase BoM?

The latest version of the Firebase BoM can be found on the Firebase Android SDK Github repository.

Q4: What is the Firebase Bill of Materials (BoM)?

Firebase Bill of Materials (BoM) is a way to manage the versions of Firebase libraries used in your project. It ensures that your app uses compatible versions of Firebase libraries. For more information, check the official Firebase BoM documentation.

Q5: Can I use multiple Firebase products in my Android app?

Yes, you can use multiple Firebase products in your Android app. Just add the respective Firebase library dependencies to your app-level build.gradle file and make sure to use the Firebase BoM to manage the versions.