Try Sign-In for Android

Use our Android sample app to see how Sign-In works, or add Sign-In to your existing app.

Required: The latest versions of Android Studio and Google Play Services.

Get the project

If this is your first time using a Google services sample, check out the google-services repository.

$ git clone https://github.com/googlesamples/google-services.git

Open Android Studio.

Select File > Open, browse to where you cloned the google-services repository, and open google-services/android/signin.

Get a configuration file

To use the sample, you need to provide some additional information to get a configuration file and finish setting up your project. Use the package name com.google.samples.quickstart.signin for the sample.

After you complete the registration, download the google-services.json file to add to your project.

Get a Configuration File

Add the configuration file to your project

Copy the google-services.json file you just downloaded into the app/ or mobile/ directory of your Android Studio project. Open the Android Studio Terminal pane:

Mac/Linux
$ mv path-to-download/Downloads/google-services.json app/
Windows
$ move path-to-download/Downloads/google-services.json app/

Create a web client ID for your server

The sample's IdTokenActivity and ServerAuthCodeActivity examples require you to specify an OAuth 2.0 web client ID. In a real app, this client ID would represent your app's backend server. To create a client ID:

  1. Open the Credentials page.
  2. Click Add credentials > OAuth 2.0 client ID.
  3. Select Web application.
  4. Click Create.

Your new client ID is displayed. Copy and paste the client ID into your project's strings.xml file: 

<string name="server_client_id">YOUR_SERVER_CLIENT_ID</string>

Run the sample

Now you're ready to build the sample and run it from Android Studio.

Build the sample and click the run button and select a connected device or emulator with Google Play Services 9.0.2 or newer.

How it works

The application builds a GoogleApiClient, specifying the sign-in options it needs. Then, when the sign-in button is clicked, the application starts the sign-in intent, which prompts the user to sign in with a Google account.

Next steps

If you want to see how you can implement Google Sign-In in your own app, take a look at our implementation guide.

Add Sign-In to your app

Did you have a good experience? Run into trouble? Let us know!