Migrate to Play Games Services v2 (Java or Kotlin)

This document describes how to migrate existing games from the games v1 SDK to the games v2 SDK.

Before you begin

You can use any preferred IDE, such as Android Studio, to migrate your game. Complete the following steps before you migrate to games v2:

Download and install Android Studio
Your game must use the games v1 SDK

Update the dependencies

In your module's build.gradle file, find this line in the module level dependencies.
```
implementation "com.google.android.gms:play-services-games-v1:+"
```
Replace it with the following code:
```
implementation "com.google.android.gms:play-services-games-v2:version"
```
Replace version with the latest version of the games SDK.
After you update the dependencies, ensure that you complete all the steps in this document.

Replace the GoogleSignInClient class with the GamesSignInClient class.

Java

Locate the files with GoogleSignInClient class.

import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;

// ... existing code

@Override
public void onCreate(@Nullable Bundle bundle) {
    super.onCreate(bundle);

    // ... existing code

    val signInOptions = GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN
    // Client used to sign in to Google services
    GoogleSignInClient googleSignInClient =
        GoogleSignIn.getClient(this, signInOptions);
}

And update it to this:

import com.google.android.gms.games.PlayGamesSdk;
import com.google.android.gms.games.PlayGames;
import com.google.android.gms.games.GamesSignInClient;

// ... existing code

@Override
public void onCreate(){
    super.onCreate();
    // Client used to sign in to Google services
    GamesSignInClient gamesSignInClient =
        PlayGames.getGamesSignInClient(getActivity());
}

Kotlin

Locate the files with GoogleSignInClient class.

import com.google.android.gms.auth.api.signin.GoogleSignIn
import com.google.android.gms.auth.api.signin.GoogleSignInClient
import com.google.android.gms.auth.api.signin.GoogleSignInOptions

// ... existing code

val signInOptions = GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN

// ... existing code

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val googleSignInClient: GoogleSignInClient =
        GoogleSignIn.getClient(this, signInOptions)
}

And update it to this:

import com.google.android.gms.games.PlayGames
import com.google.android.gms.games.PlayGamesSdk
import com.google.android.gms.games.GamesSignInClient

// ... existing code

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    PlayGamesSdk.initialize(this)
    // client used to sign in to Google services
    val gamesSignInClient: GamesSignInClient =
        PlayGames.getGamesSignInClient(this)
}

Update the `GoogleSignIn` code

GoogleSignIn API and scopes are not supported in the games v2 SDK. Replace the GoogleSignIn API code for OAuth 2.0 scopes with the GamesSignInClient API as shown in the following example:

Java

Locate the files with GoogleSignIn class and scopes.

// Request code used when invoking an external activity.
private static final int RC_SIGN_IN = 9001;

private boolean isSignedIn() {
    GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
    GoogleSignInOptions signInOptions =
    GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN;
    return GoogleSignIn.hasPermissions(account, signInOptions.getScopeArray());
}

private void signInSilently() {
    GoogleSignInOptions signInOptions =
        GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN;
    GoogleSignInClient signInClient = GoogleSignIn.getClient(this, signInOptions);
    signInClient
        .silentSignIn()
        .addOnCompleteListener(
            this,
            task -> {
            if (task.isSuccessful()) {
                // The signed-in account is stored in the task's result.
                GoogleSignInAccount signedInAccount = task.getResult();
                showSignInPopup();
            } else {
                // Perform interactive sign in.
                startSignInIntent();
            }
        });
}

private void startSignInIntent() {
    GoogleSignInClient signInClient = GoogleSignIn.getClient(this,
        GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN);
    Intent intent = signInClient.getSignInIntent();
    startActivityForResult(intent, RC_SIGN_IN);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == RC_SIGN_IN) {
        GoogleSignInResult result =
        Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        if (result.isSuccess()) {
            // The signed-in account is stored in the result.
            GoogleSignInAccount signedInAccount = result.getSignInAccount();
            showSignInPopup();
        } else {
            String message = result.getStatus().getStatusMessage();
            if (message == null || message.isEmpty()) {
                message = getString(R.string.signin_other_error);
        }
        new AlertDialog.Builder(this).setMessage(message)
            .setNeutralButton(android.R.string.ok, null).show();
        }
    }
}

private void showSignInPopup() {
Games.getGamesClient(requireContext(), signedInAccount)
    .setViewForPopups(contentView)
    .addOnCompleteListener(
        task -> {
            if (task.isSuccessful()) {
                logger.atInfo().log("SignIn successful");
            } else {
                logger.atInfo().log("SignIn failed");
            }
        });
  }

And update it to this:

private void signInSilently() {
    gamesSignInClient.isAuthenticated().addOnCompleteListener(isAuthenticatedTask -> {
    boolean isAuthenticated =
        (isAuthenticatedTask.isSuccessful() &&
            isAuthenticatedTask.getResult().isAuthenticated());
        if (isAuthenticated) {
            // Continue with Play Games Services
        } else {
            // If authentication fails, either disable Play Games Services
            // integration or
            // display a login button to prompt players to sign in.
            // Use`gamesSignInClient.signIn()` when the login button is clicked.
        }
    });
}

@Override
protected void onResume() {
    super.onResume();
    // When the activity is inactive, the signed-in user's state can change;
    // therefore, silently sign in when the app resumes.
    signInSilently();
}

Kotlin

Locate the files with GoogleSignIn class and scopes.

// Request codes we use when invoking an external activity.
private val RC_SIGN_IN = 9001

// ... existing code

private fun isSignedIn(): Boolean {
    val account = GoogleSignIn.getLastSignedInAccount(this)
    val signInOptions = GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN
    return GoogleSignIn.hasPermissions(account, *signInOptions.scopeArray)
}

private fun signInSilently() {
    val signInOptions = GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN
    val signInClient = GoogleSignIn.getClient(this, signInOptions)
    signInClient.silentSignIn().addOnCompleteListener(this) { task ->
        if (task.isSuccessful) {
            // The signed-in account is stored in the task's result.
            val signedInAccount = task.result
            // Pass the account to showSignInPopup.
            showSignInPopup(signedInAccount)
        } else {
            // Perform interactive sign in.
            startSignInIntent()
        }
    }
}

private fun startSignInIntent() {
    val signInClient = GoogleSignIn.getClient(this, GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN)
    val intent = signInClient.signInIntent
    startActivityForResult(intent, RC_SIGN_IN)
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    if (requestCode == RC_SIGN_IN) {
        val result = Auth.GoogleSignInApi.getSignInResultFromIntent(data)
        if (result.isSuccess) {
            // The signed-in account is stored in the result.
            val signedInAccount = result.signInAccount
            showSignInPopup(signedInAccount) // Pass the account to showSignInPopup.
        } else {
            var message = result.status.statusMessage
            if (message == null || message.isEmpty()) {
                message = getString(R.string.signin_other_error)
        }
        AlertDialog.Builder(this)
            .setMessage(message)
            .setNeutralButton(android.R.string.ok, null)
            .show()
        }
    }
}

private fun showSignInPopup(signedInAccount: GoogleSignInAccount) {
    // Add signedInAccount parameter.
    Games.getGamesClient(this, signedInAccount)
        .setViewForPopups(contentView) // Assuming contentView is defined.
        .addOnCompleteListener { task ->
        if (task.isSuccessful) {
            logger.atInfo().log("SignIn successful")
        } else {
            logger.atInfo().log("SignIn failed")
        }
    }
}

And update it to this:

private fun signInSilently() {
    gamesSignInClient.isAuthenticated.addOnCompleteListener { isAuthenticatedTask ->
        val isAuthenticated = isAuthenticatedTask.isSuccessful &&
        isAuthenticatedTask.result.isAuthenticated
        if (isAuthenticated) {
            // Continue with Play Games Services
        } else {
            // To handle a user who is not signed in, either disable Play Games Services integration
            // or display a login button. Selecting this button calls `gamesSignInClient.signIn()`.
        }
    }
}

override fun onResume() {
    super.onResume()
    // Since the state of the signed in user can change when the activity is
    // not active it is recommended to try and sign in silently from when the
    // app resumes.
    signInSilently()
}

Add the `GamesSignInClient` code

If the player is successfully signed in, remove the Play Games Services sign-in button from your game. If the user chooses not to sign in when the game launches, continue showing a button with the Play Games Services icon, and start the login process with GamesSignInClient.signIn().

Java

private void startSignInIntent() {
    gamesSignInClient
        .signIn()
        .addOnCompleteListener( task -> {
            if (task.isSuccessful() && task.getResult().isAuthenticated()) {
                // sign in successful
            } else {
                // sign in failed
            }
        });
  }

Kotlin

private fun startSignInIntent() {
    gamesSignInClient
        .signIn()
        .addOnCompleteListener { task ->
            if (task.isSuccessful && task.result.isAuthenticated) {
                // sign in successful
            } else {
                // sign in failed
            }
        }
  }

Remove sign-out code

Remove the code for GoogleSignInClient.signOut.

Remove the code shown in the following example:

Java

// ... existing code

private void signOut() {
    GoogleSignInClient signInClient = GoogleSignIn.getClient(this,
    GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN);
    signInClient.signOut().addOnCompleteListener(this,
    new OnCompleteListener() {
        @Override
        public void onComplete(@NonNull Task task) {
           // At this point, the user is signed out.
        }
    });
}

Kotlin

// ... existing code

private fun signOut() {
    val signInClient = GoogleSignIn.getClient(this, GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN)
    signInClient.signOut().addOnCompleteListener(this) {
    // At this point, the user is signed out.
    }
}

Include the following code to check if you have automatically signed-in and add the custom logic if you have it available.

Java

private void checkIfAutomaticallySignedIn() {
gamesSignInClient.isAuthenticated().addOnCompleteListener(isAuthenticatedTask -> {
boolean isAuthenticated =
    (isAuthenticatedTask.isSuccessful() &&
    isAuthenticatedTask.getResult().isAuthenticated());

    if (isAuthenticated) {
        // Continue with Play Games Services
        // If your game requires specific actions upon successful sign-in,
        // you can add your custom logic here.
        // For example, fetching player data or updating UI elements.
    } else {
        // Disable your integration with Play Games Services or show a
        // login button to ask  players to sign-in. Clicking it should
        // call GamesSignInClient.signIn().
        }
    });
}

Kotlin

private void checkIfAutomaticallySignedIn() {
gamesSignInClient.isAuthenticated()
    .addOnCompleteListener { task ->
    val isAuthenticated = task.isSuccessful && task.result?.isAuthenticated ?: false

        if (isAuthenticated) {
            // Continue with Play Games Services
        } else {
            // Disable your integration or show a login button
        }
    }
}

Update client class names and methods

When you migrate to games v2, the methods used to get the client class names are different. Use the corresponding PlayGames.getxxxClient() methods instead of Games.getxxxClient() methods.

For example, for LeaderboardsClient use PlayGames.getLeaderboardsClient() instead of the Games.getLeaderboardsClient() method.

Java

Locate the code for LeaderboardsClient.

import com.google.android.gms.games.LeaderboardsClient;
import com.google.android.gms.games.Games;

@Override
public void onCreate(@Nullable Bundle bundle) {
    super.onCreate(bundle);
        // Get the leaderboards client using Play Games services.
    LeaderboardsClient leaderboardsClient = Games.getLeaderboardsClient(this,
        GoogleSignIn.getLastSignedInAccount(this));
}

And update it to this:

import com.google.android.gms.games.LeaderboardsClient;
import com.google.android.gms.games.PlayGames;

 @Override
public void onCreate(@Nullable Bundle bundle) {
    super.onCreate(bundle);
        // Get the leaderboards client using Play Games services.
        LeaderboardsClient leaderboardsClient = PlayGames.getLeaderboardsClient(getActivity());
}

Kotlin

Locate the code for LeaderboardsClient.

import com.google.android.gms.games.LeaderboardsClient
import com.google.android.gms.games.Games
// Initialize the variables.
private lateinit var leaderboardsClient: LeaderboardsClient

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    leaderboardsClient = Games.getLeaderboardsClient(this,
        GoogleSignIn.getLastSignedInAccount(this))
}

And update it to this:

import com.google.android.gms.games.LeaderboardsClient
import com.google.android.gms.games.PlayGames
    // Initialize the variables.
private lateinit var leaderboardsClient: LeaderboardsClient

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    leaderboardsClient = PlayGames.getLeaderboardsClient(this)
}

Similarly, use the corresponding methods for the following clients: AchievementsClient, EventsClient, GamesSignInClient, PlayerStatsClient, RecallClient, SnapshotsClient, or PlayersClient.

Update the server side access classes

To request a server side access token, use the GamesSignInClient.requestServerSideAccess() method instead of the GoogleSignInAccount.getServerAuthCode() method.

The following example shows how to request a server side access token.

Java

Locate the code for GoogleSignInOptions class.

    private static final int RC_SIGN_IN = 9001;
    private GoogleSignInClient googleSignInClient;

    private void startSignInForAuthCode() {
        /** Client ID for your backend server. */
        String webClientId = getString(R.string.webclient_id);
        GoogleSignInOptions signInOption = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN)
            .requestServerAuthCode(webClientId)
            .build();

        GoogleSignInClient signInClient = GoogleSignIn.getClient(this, signInOption);
        Intent intent = signInClient.getSignInIntent();
        startActivityForResult(intent, RC_SIGN_IN);
    }

    /** Auth code to send to backend server */
    private String mServerAuthCode;

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == RC_SIGN_IN) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        if (result.isSuccess()) {
            mServerAuthCode = result.getSignInAccount().getServerAuthCode();
        } else {
            String message = result.getStatus().getStatusMessage();
            if (message == null || message.isEmpty()) {
                message = getString(R.string.signin_other_error);
            }
            new AlertDialog.Builder(this).setMessage(message)
                .setNeutralButton(android.R.string.ok, null).show();
        }
      }
    }

And update it to this:

  private void startRequestServerSideAccess() {
      GamesSignInClient gamesSignInClient = PlayGames.getGamesSignInClient(this);
      gamesSignInClient
          .requestServerSideAccess(OAUTH_2_WEB_CLIENT_ID, /* forceRefreshToken= */ false)
          .addOnCompleteListener(task -> {
              if (task.isSuccessful()) {
                  String serverAuthToken = task.getResult();
                  // Send authentication code to the backend game server.
                  // Exchange for an access token.
                  // Verify the player with Play Games Services REST APIs.
              } else {
                // Authentication code retrieval failed.
              }
        });
  }

Kotlin

Locate the code for GoogleSignInOptions class.

  // ... existing code

  private val RC_SIGN_IN = 9001
  private lateinit var googleSignInClient: GoogleSignInClient

  // Auth code to send to backend server.
  private var mServerAuthCode: String? = null

  private fun startSignInForAuthCode() {
      // Client ID for your backend server.
      val webClientId = getString(R.string.webclient_id)

      val signInOption = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN)
          .requestServerAuthCode(webClientId)
          .build()

      googleSignInClient = GoogleSignIn.getClient(this, signInOption)
      val intent = googleSignInClient.signInIntent
      startActivityForResult(intent, RC_SIGN_IN)
  }

  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
      super.onActivityResult(requestCode, resultCode, data)
      if (requestCode == RC_SIGN_IN) {
          val result = Auth.GoogleSignInApi.getSignInResultFromIntent(data)
          if (result.isSuccess) {
              mServerAuthCode = result.signInAccount.serverAuthCode
          } else {
              var message = result.status.statusMessage
              if (message == null || message.isEmpty()) {
                  message = getString(R.string.signin_other_error)
              }
              AlertDialog.Builder(this).setMessage(message)
                  .setNeutralButton(android.R.string.ok, null).show()
            }
        }
  }

And update it to this:

  private void startRequestServerSideAccess() {
  GamesSignInClient gamesSignInClient = PlayGames.getGamesSignInClient(this);
      gamesSignInClient
          .requestServerSideAccess(OAUTH_2_WEB_CLIENT_ID, /* forceRefreshToken= */ false)
          .addOnCompleteListener(task -> {
              if (task.isSuccessful()) {
                  String serverAuthToken = task.getResult();
                  // Send authentication code to the backend game server.
                  // Exchange for an access token.
                  // Verify the player with Play Games Services REST APIs.
              } else {
                // Authentication code retrieval failed.
              }
        });
  }

Migrate from GoogleApiClient

For older existing integrations your game may be depending on the GoogleApiClient API variation of the Play Games Services SDK. This was deprecated in late 2017 and replaced by "connectionless" clients. To migrate you can replace the GoogleApiClient class with a "connectionless" equivalent. Here is a mapping of common classes:

games v2

  // Replace com.google.android.gms.games.achievement.Achievements
  com.google.android.gms.games.AchievementsClient
  // Replace com.google.android.gms.games.leaderboard.Leaderboard
  com.google.android.gms.games.LeaderboardsClient
  // Replace com.google.android.gms.games.snapshot.Snapshots
  com.google.android.gms.games.SnapshotsClient
  // Replace com.google.android.gms.games.stats.PlayerStats
  com.google.android.gms.games.PlayerStatsClient
  // Replace com.google.android.gms.games.Players
  com.google.android.gms.games.PlayersClient
  // Replace com.google.android.gms.games.GamesStatusCodes
  com.google.android.gms.games.GamesClientStatusCodes

games v1

  com.google.android.gms.games.achievement.Achievements
  com.google.android.gms.games.leaderboard.Leaderboard
  com.google.android.gms.games.snapshot.Snapshots
  com.google.android.gms.games.stats.PlayerStats
  com.google.android.gms.games.Players
  com.google.android.gms.games.GamesStatusCodes

Build and run the game

To build and run on Android Studio, see Build and run your app.

Test your game

Ensure your game functions as designed by testing it. The tests you perform depend on your game's features.

The following is a list of common tests to run.

Successful sign-in.
1. Automatic sign-in works. The user should be signed in to Play Games Services upon launching the game.
2. The welcome popup is displayed.
  
  Sample welcome popup (click to enlarge).
3. Successful log messages are displayed. Run the following command in the terminal:
```
adb logcat | grep com.google.android.
```
  A successful log message is shown in the following example:
```
[$PlaylogGamesSignInAction$SignInPerformerSource@e1cdecc
number=1 name=GAMES_SERVICE_BROKER>], returning true for shouldShowWelcomePopup.
[CONTEXT service_id=1 ]
```
Ensure UI component consistency.
1. Pop ups, leaderboards, and achievements display correctly and consistently on various screen sizes and orientations in the Play Games Services user interface (UI).
2. Sign-out option is not visible in the Play Games Services UI.
3. Player ID is consistent and can be used for backend integration.
4. If the game uses server-side authentication, thoroughly test the requestServerSideAccess flow. Ensure the server receives the auth code and can exchange it for an access token. Test both success and failure scenarios for network errors, invalid client ID scenarios.

If your game was using any of the following features, test them to ensure that they work the same as before the migration:

Leaderboards: Submit scores and view leaderboards. Check for the correct ranking and display of player names and scores.
Achievements: Unlock achievements and verify they are correctly recorded and displayed in the Play Games UI.
Saved Games: If the game uses saved games, ensure that saving and loading the game progress works flawlessly. This is particularly critical to test across multiple devices and after app updates.

Post migration tasks

Complete the following steps after you have migrated to games v2.

Publish the game

Build the APK(s) and publish the game in the Play Console.

In the Android Studio menu, select Build > Build Bundles(s) / APK(s) > Build APK(s).
Publish your game. For more information, see Publish private apps from the Play Console.

Migrate to Play Games Services v2 (Java or Kotlin)

Before you begin

Update the dependencies

Migrate from deprecated Google Sign-In

Java

Kotlin

Update the GoogleSignIn code

Java

Kotlin

Add the GamesSignInClient code

Java

Kotlin

Remove sign-out code

Java

Kotlin

Check successful auto sign-in

Java

Kotlin

Update client class names and methods

Java

Kotlin

Update the server side access classes

Java

Kotlin

Migrate from GoogleApiClient

games v2

games v1

Build and run the game

Test your game

Post migration tasks

Publish the game

Update the `GoogleSignIn` code

Add the `GamesSignInClient` code