게임이 시작되면 항상 사용자 로그인을 시도합니다. 사용자를 인증하려면 사용자가 성공적으로 로그인했는지 확인한 다음 플레이어 ID를 가져와야 합니다.
로그인 시도를 확인하려면 GamesSignInClient.isAuthenticated()를 호출하고 addOnCompleteListener를 사용하여 결과를 가져옵니다. 예를 들면 다음과 같습니다.
GamesSignInClient gamesSignInClient = PlayGames.getGamesSignInClient(getActivity());
gamesSignInClient.isAuthenticated().addOnCompleteListener(isAuthenticatedTask -> {
boolean isAuthenticated =
(isAuthenticatedTask.isSuccessful() &&
isAuthenticatedTask.getResult().isAuthenticated());
if (isAuthenticated) {
// Continue with Play Games Services
} 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().
}
});
사용자가 게임이 시작될 때 로그인하지 않도록 선택하는 경우, 개발자는 Play 게임즈 아이콘이 있는 버튼을 계속 표시하고 사용자가 버튼을 누르면 GamesSignInClient.signIn()을 호출하여 사용자 로그인을 다시 시도하도록 선택할 수 있습니다.
사용자가 로그인되어 있는지 확인한 후에는 플레이어 ID를 가져와 사용자를 식별할 수 있습니다. 예를 들면 다음과 같습니다.
PlayGames.getPlayersClient(activity).getCurrentPlayer().addOnCompleteListener(mTask -> {
// Get PlayerID with mTask.getResult().getPlayerId()
}
);
이 페이지에 나와 있는 콘텐츠와 코드 샘플에는 콘텐츠 라이선스에서 설명하는 라이선스가 적용됩니다. 자바 및 OpenJDK는 Oracle 및 Oracle 계열사의 상표 또는 등록 상표입니다.
최종 업데이트: 2025-07-26(UTC)
[null,null,["최종 업데이트: 2025-07-26(UTC)"],[],[],null,["# Sign-in for Android games\n\n| **Note:** This guide is for the Play Games Services v2 SDK. For information on the previous version of this SDK, see the [Play Games Services v1\n| documentation](/games/pgs/v1/android/signin).\n\nIn order to access Google Play Games Services functionality, your game needs to provide the\nsigned-in player's account. This documentation describes how to\nimplement a seamless sign-in experience in your game.\n\nThe Play Games Services v2 SDK brings a number of improvements that increase the\nnumber of users signed into your game, and make development easier:\n\n- Improvements for users:\n - After selecting a default account, users are logged-in without needing to interact with a prompt.\n - Users no longer need to download the Play Games App to sign-in with Play Games Services or create a new account.\n - Users can now manage their Play Games Services accounts for multiple games from a single page.\n- Improvements for developers:\n - Client code no longer needs to handle the sign-in or sign-out flow, as login is automatically triggered when the game starts, and account management is handled in the OS settings.\n\n| **Note:** You must follow additional steps if you want to enable recall functionality. For more information, see [Integrate the PGS Recall API within\n| your game](/games/pgs/recall/recall-setup).\n\nNew client integration\n----------------------\n\nThis section shows how to do a new client integration with Play Games Services\nSign In v2.\n| **Note:** If you already have a client integration with v1, follow the instructions in [Migrate from v1 to v2](/games/pgs/android/migrate-to-v2) to migrate your integration.\n\n### Add the dependency\n\nAdd the Play Game Services SDK dependency to your app's root-level\n`build.gradle` file. If you are using Gradle, you can add or update the\ndependency as follows: \n\n dependencies {\n implementation \"com.google.android.gms:play-services-games-v2:+\"\n }\n\n### Define the project ID\n\nTo add the Play Games Services SDK project ID to your app, complete the\nfollowing steps:\n\n1. In your app's `AndroidManifest.xml` file, add the following `\u003cmeta-data\u003e`\n element and attributes to the `\u003capplication\u003e` element:\n\n \u003cmanifest\u003e\n \u003capplication\u003e\n \u003cmeta-data android:name=\"com.google.android.gms.games.APP_ID\"\n android:value=\"@string/game_services_project_id\"/\u003e\n \u003c/application\u003e\n \u003c/manifest\u003e\n\n Define the String resource reference `@string/game_services_project_id`\n using your games' Game services project id as the value. Your Games services\n project id can be found under your game name in the *Configuration* page on\n the Google Play Console.\n2. In your `res/values/strings.xml` file, add a string resource reference\n and set your project ID as the value. In Google Play Console, you can find your\n project ID under your game name in the **Configuration** page. For example:\n\n \u003c!-- res/values/strings.xml --\u003e\n \u003cresources\u003e\n \u003c!-- Replace 0000000000 with your game's project id. Example value shown above. --\u003e\n \u003cstring translatable=\"false\" name=\"game_services_project_id\"\u003e 0000000000 \u003c/string\u003e\n \u003c/resources\u003e\n\n### Initialize the SDK\n\nInitialize Play Games SDK in the `onCreate(..)` callback of your `Application`\nclass. \n\n import com.google.android.gms.games.PlayGamesSdk;\n\n ...\n\n @Override\n public void onCreate(){\n super.onCreate();\n PlayGamesSdk.initialize(this);\n }\n\n### Get the sign-in result\n\nWhen your game launches, it will always attempt to sign in the user. To\nauthenticate the user, you must verify that the user successfully signed in,\nand then get their Player ID.\n\nTo verify the sign in attempt, call `GamesSignInClient.isAuthenticated()` and\nuse `addOnCompleteListener` to retrieve the results. For example: \n\n GamesSignInClient gamesSignInClient = PlayGames.getGamesSignInClient(getActivity());\n\n gamesSignInClient.isAuthenticated().addOnCompleteListener(isAuthenticatedTask -\u003e {\n boolean isAuthenticated =\n (isAuthenticatedTask.isSuccessful() &&\n isAuthenticatedTask.getResult().isAuthenticated());\n\n if (isAuthenticated) {\n // Continue with Play Games Services\n } else {\n // Disable your integration with Play Games Services or show a\n // login button to ask players to sign-in. Clicking it should\n // call GamesSignInClient.signIn().\n }\n });\n\nIf the user chooses not to sign in when the game launches, you may optionally\nchoose to continue showing a button with the Play Games icon, and attempt to\nsign in the user again by calling `GamesSignInClient.signIn()` if the user\npresses the button.\n\nAfter verifying that the user is signed in, you can retrieve the Player ID to\nidentify the user. For example: \n\n PlayGames.getPlayersClient(activity).getCurrentPlayer().addOnCompleteListener(mTask -\u003e {\n // Get PlayerID with mTask.getResult().getPlayerId()\n }\n );\n\n| **Note:** You should not store the player ID returned from the Android SDK in the game's backend, as it's possible for an untrusted device to tamper with it. Instead, you should [enable server-side API access](/games/pgs/android/server-access) and retrieve the player ID or other data with a server-side call directly from the game's backend."]]
