Resolving the Code 10 Error in Google SignIn API for Android Apps

Encountering the Google SignIn API `Code 10` error on a new machine? This guide provides a step-by-step guide to resolve the issue by adding the correct SHA Key in your Firebase project settings.
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Resolving the Code 10 Error in Google SignIn API for Android Apps

If you’re developing an Android application that utilizes the Google SignIn API, you might run into the frustrating Code 10 error when compiling your project on a different machine. This issue can emerge from a variety of misconfigurations, particularly related to the security certificates that Google uses to authenticate the application. Let's dive into understanding why this issue occurs and how to resolve it effectively.

Understanding the Problem

The Code 10 error in the Google SignIn API is typically encountered when there is a mismatch in the SHA-1 certificate fingerprint between your application and the registered configuration on Google’s developer console. This usually happens if you are working on a new machine where the SHA-1 key hasn't been registered yet or when there are discrepancies in the setup.

Common Symptoms

Successful login on one machine but failures on another.

Console error messages indicating ApiException: 10.

Example Error Output

For reference, here’s an excerpt from the error log you might see:

[[See Video to Reveal this Text or Code Snippet]]

How to Fix the Code 10 Error

Step 1: Retrieve Your SHA-1 Key

To fix the issue, you need to ensure that the SHA-1 certificate fingerprint from your new machine is acknowledged by your Firebase project. Here’s how you can find it:

Build your app:

Generate a new APK or use the command:

[[See Video to Reveal this Text or Code Snippet]]

Locate the SHA-1:

Look for the SHA-1 key under the variant of your app on the console log.

Step 2: Update Your Firebase Project

Once you have the correct SHA-1 key, follow these steps to add it to your Firebase configuration:

Log in to Firebase Console:

Navigate to your Firebase project.

Access Project Overview:

Click on the settings icon (⚙️) next to "Project Overview" in the sidebar.

Go to Project Settings:

Select the "General" tab in the Project Settings.

Add Your SHA Key:

Scroll down to the section under your package name.

Look for the option to add a new SHA-1 key and input the one you retrieved earlier.

Step 3: Verify google-services.json

Make sure that the google-services.json file is correctly placed in the app folder of your project on both machines. If you have made changes in Firebase, consider downloading the latest google-services.json to ensure all configurations are up to date.

Conclusion

By following the steps outlined above, you should be able to resolve the Code 10 error and successfully run your Google SignIn implementation on any machine. Remember that every time you compile your app on a new device, you must ensure that the SHA-1 key is properly registered in your Google developer console through Firebase. This small step can save a lot of debugging time and frustration!

If you continue facing issues or have further questions, don’t hesitate to reach out in the comments. Happy coding!