Example code for doing Google Play Games deep linking from an app using game services.

google_play_games_deep_link_example.java

/**
 * Build the basic intent. This is common to all linked pages
 * This adds the current user's playerId. This is important.
 */
public Intent buildDeepLinkIntent(GoogleApiClient googleApiClient) {
    Intent intent = new Intent();
    //Clear the activity so the back button returns to your app
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    //Manually specify the package and activity name
    intent.setComponent(new ComponentName("com.google.android.play.games", "com.google.android.gms.games.ui.destination.api.ApiActivity"));
    //Not really needed as default happens if you don't specify it.
    intent.addCategory(Intent.CATEGORY_DEFAULT);
    //You must specify the current players user. It ensures that Google Play Games is logged in as the same person.
    intent.putExtra("com.google.android.gms.games.ACCOUNT_KEY", Games.Players.getCurrentPlayerId(googleApiClient));
    //I have not tested with this but there is an option to specify the minimum version
    //intent.putExtra("com.google.android.gms.games.MIN_VERSION", ???);
    return intent;
}

/**
 * Fire the intent if Google Play Games is installed.
 * Otherwise handle the error
 */
public boolean startGooglePlayGames(Intent intent) {
    //This assumes it is running in a fragment. Adjust getActivity() as needed.
    PackageManager packageManager = getActivity().getPackageManager();
    List activities = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
    boolean isIntentSafe = activities.size() > 0;
    if(isIntentSafe) {
        startActivity(intent);
        return true;
    } else {
        return false;
    }
}

/**
 * Launches the about screen for your game
 */
public void intentAbout(Intent intent, GoogleApiClient googleApiClient) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1050);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
}

/**
 * Launches the achievements page
 */
public void intentAchievements(Intent intent, GoogleApiClient googleApiClient) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1051);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
}

/**
 * Launches the leaderboards page
 */
public void intentLeaderboards(Intent intent, GoogleApiClient googleApiClient) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1052);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
}

/**
 * Launches to a specific leaderboard. You must specify the leaderboardId
 */
public void intentLeaderboardSpecific(Intent intent, GoogleApiClient googleApiClient, String leaderboardId) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1053);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
    intent.putExtra("com.google.android.gms.games.LEADERBOARD_ID", leaderboardId);
}

/**
 * Launches the list of players (in your circles) with this game.
 */
public void intentPlayers(Intent intent, GoogleApiClient googleApiClient) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1054);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
}

/**
 * Launches the quests available for this game
 */
public void intentQuests(Intent intent, GoogleApiClient googleApiClient) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1055);
    intent.putExtra("com.google.android.gms.games.GAME", Games.GamesMetadata.getCurrentGame(googleApiClient));
}

/**
 * Shows the current players profile DEPRECIATED)
 */
public void intentProfileDepreciated(Intent intent) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1100);
}

/**
 * Shows the current players profile
 */
public void intentProfile(Intent intent) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1101);
}

/**
 * Shows the compare profiles page. You must pass a full Player object for the second player.
 * Make sure you use .freeze() on it so you can release your buffers.
 */
public void intentProfileCompare(Intent intent, com.google.android.gms.games.Player player) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1102);
    intent.putExtra("com.google.android.gms.games.OTHER_PLAYER", player);
}

/**
 * Show the inbox (matches) list.
 */
public void intentInbox(Intent intent) {
    intent.putExtra("com.google.android.gms.games.SCREEN", 1200);
}