このガイドでは、Android Studio プロジェクトで Friends API を使用する方法について説明します。
友だちを読み込む
現在のユーザーと友だちになっているプレーヤーのリストを取得して(ゲーム内で)表示できます。ユーザーとして、どのゲームが友だちリストにアクセスできるようにするかを管理できます。友だちリストを取得するときは、権限が必要なケースに対処する必要があります。これはすべて API にカプセル化されているため、アクセスをリクエストし、その後に友だちリストを使用するというタスクを簡単に行えます。友だちリストを読み込む手順は次のとおりです。
// Attempt loading friends.// Register a success listener to handle the successfully loaded friends list.// Register a failure listener to handle asking for permission to access the list.PlayGames.getPlayersClient(this).loadFriends(PAGE_SIZE,/* forceReload= */false).addOnSuccessListener(newOnSuccessListener<AnnotatedData<PlayerBuffer>>(){@OverridepublicvoidonSuccess(AnnotatedData<PlayerBuffer>data){PlayerBufferplayerBuffer=data.get();// ...}).addOnFailureListener(exception->{if(exceptioninstanceofFriendsResolutionRequiredException){PendingIntentpendingIntent=((FriendsResolutionRequiredException)task.getException()).getResolution();parentActivity.startIntentSenderForResult(pendingIntent.getIntentSender(),/* requestCode */SHOW_SHARING_FRIENDS_CONSENT,/* fillInIntent */null,/* flagsMask */0,/* flagsValues */0,/* extraFlags */0,/* options */null);}});return;}
次のコードは、同意リクエストの結果を処理する方法を示しています。
/** Handle the activity result from the request for consent. */@OverridepublicvoidonActivityResult(intrequestCode,intresult,Intentdata){if(requestCode==SHOW_SHARING_FRIENDS_CONSENT){if(result==Activity.RESULT_OK){// We got consent from the user to access their friends. Retry loading the friendscallLoadFriends();}else{// User did not grant consent.}}}
別のプレーヤーのプロフィールを表示する
ゲーム内から別のプレーヤーの Play ゲーム プロフィールのビューを表示できます。このビューでは、表示されているプレーヤーとの間で友だち招待を送受信できます。このビューでは、友だちリストへのアクセスは必要ありません。また、Play ゲームのゲーマー ID とは別のコンセプトのプレーヤー名がゲームに含まれている場合は、それをプロフィール ビューに渡すことで、補足として友だち招待に含めることができます。
呼び出しが成功すると、Google Play Games サービスは、ユーザーが別のプレーヤーのプロフィールと自分を比較できる画面を表示するインテントを返します。
前のステップの Intent を使用してアクティビティを開始します。
// Retrieve and launch an Intent to show a player profile within the game.PlayGames.getPlayersClient(this).getCompareProfileIntent(otherPlayerId).addOnSuccessListener(newOnSuccessListener<Intent>(){@OverridepublicvoidonSuccess(Intentintent){startActivityForResult(intent,RC_SHOW_PROFILE);// ...}});
ゲームに独自のプレーヤー名がある場合、API 呼び出しに追加できます。これにより Play Games は、ゲーム内から友だち招待を送信するプレーヤーのニックネームを「<game-specific-name> from <your-game-name>」に設定できます。Play Games は自動的に「from <your-game-name>」を付加します。
// Show a player profile within the game, with additional hints containing the// game-specific names for both players.// - otherPlayerId is the Play Games playerId of the player to view.// - otherPlayerInGameName is the game-specific name of the player being viewed.// - currentPlayerInGameName is the game-specific name of the player who is signed// in. Hence if the player sends an invitation to the profile they are viewing,// their game-specific name can be included.PlayGames.PlayersClient(this).getCompareProfileIntentWithAlternativeNameHints(otherPlayerId,otherPlayerInGameName,currentPlayerInGameName).addOnSuccessListener(newOnSuccessListener<Intent>(){@OverridepublicvoidonSuccess(Intentintent){startActivityForResult(intent,RC_SHOW_PROFILE);// ...}});
[null,null,["最終更新日 2025-07-26 UTC。"],[],[],null,["# Friends in 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/friends).\n\nThis guide describes how to use the [Friends](/games/pgs/friends) APIs in\nAndroid Studio projects.\n\nLoad friends\n------------\n\nYou can retrieve and display (in the game) a list of players who are friends\nwith the current user. As a user, it is possible to control which games have\naccess to the friends list. When you retrieve the friends list, you must handle\nthe case where permission is required. This is all encapsulated in the API to\nmake requesting access and subsequently using the friends list a straightforward\ntask. To load the friends list, follow these steps:\n\n1. Call the [`PlayersClient.loadFriends()`](https://developers.google.com/android/reference/com/google/android/gms/games/PlayersClient#loadFriends(int,%20boolean)) method, which is an asynchronous call returning a [`Task`](https://developers.google.com/android/reference/com/google/android/gms/tasks/Task) object.\n2. If the call is successful (the user already granted access to the friends list), Google Play Games Services returns an annotated [`PlayerBuffer`](https://developers.google.com/android/reference/com/google/android/gms/games/PlayerBuffer) that represents the user's friends.\n3. If the player needs to grant access to the friends list, the call fails with\n a\n [`FriendsResolutionRequiredException`](https://developers.google.com/android/reference/com/google/android/gms/games/FriendsResolutionRequiredException).\n No dialogs are shown yet.\n\n 1. This exception contains an `Intent` that triggers a dialog to ask the player for consent. You can launch this `Intent` immediately to open a consent dialog. You can only use this `Intent` once.\n 2. If the result of the `Intent`'s activity is `Activity.RESULT_OK`, then\n consent was granted. Call `loadFriends()` again to return the friends\n list. If the result is `Activity.RESULT_CANCELLED`, the user did\n not consent and `loadFriends()` will continue to return\n `FriendsResolutionRequiredException`.\n\n | **Note:** If you call `loadFriends()` from your server and determine that you need to request consent, you need to call `loadFriends()` again from your game client. This second call won't succeed, but it will provide you the `Intent` required to show the consent dialog.\n\nThe following code shows how to load the friends list: \n\n // Attempt loading friends.\n // Register a success listener to handle the successfully loaded friends list.\n // Register a failure listener to handle asking for permission to access the list.\n PlayGames.getPlayersClient(this)\n .loadFriends(PAGE_SIZE, /* forceReload= */ false)\n .addOnSuccessListener(\n new OnSuccessListener\u003cAnnotatedData\u003cPlayerBuffer\u003e\u003e() {\n @Override\n public void onSuccess(AnnotatedData\u003cPlayerBuffer\u003e data) {\n PlayerBuffer playerBuffer = data.get();\n // ...\n })\n\n .addOnFailureListener(\n exception -\u003e {\n if (exception instanceof FriendsResolutionRequiredException) {\n PendingIntent pendingIntent =\n ((FriendsResolutionRequiredException) task.getException())\n .getResolution();\n parentActivity.startIntentSenderForResult(\n pendingIntent.getIntentSender(),\n /* requestCode */ SHOW_SHARING_FRIENDS_CONSENT,\n /* fillInIntent */ null,\n /* flagsMask */ 0,\n /* flagsValues */ 0,\n /* extraFlags */ 0,\n /* options */ null);\n }\n });\n return;\n }\n\nThe following code shows how to handle the result from the request for consent: \n\n /** Handle the activity result from the request for consent. */\n @Override\n public void onActivityResult(int requestCode, int result, Intent data) {\n if (requestCode == SHOW_SHARING_FRIENDS_CONSENT) {\n if (result == Activity.RESULT_OK) {\n // We got consent from the user to access their friends. Retry loading the friends\n callLoadFriends();\n } else {\n // User did not grant consent.\n }\n }\n }\n\nView another player's profile\n-----------------------------\n\nYou can display a view of another player's Play Games profile from\nwithin your game. This view allows players to send and accept friend invitations\nfor the player being viewed. This view does not require access to the friends\nlist. Additionally, if your game has its own concept of player names separate\nfrom Play Games Gamer IDs, you can pass these along to the profile view\nso that they can be included in any friend invitations for additional context.\n\nTo show another player's profile, follow these steps:\n\n1. Call the [`PlayersClient.getCompareProfileIntent()`](https://developers.google.com/android/reference/com/google/android/gms/games/PlayersClient) method, which is an asynchronous call returning a [`Task`](https://developers.google.com/android/reference/com/google/android/gms/tasks/Task) object.\n2. If the call is successful, Google Play Games Services returns an Intent that will display a screen where the user can compare themselves against another player's profile.\n3. Use the `Intent` from the previous step to start an activity.\n\n // Retrieve and launch an Intent to show a player profile within the game.\n PlayGames.getPlayersClient(this)\n .getCompareProfileIntent(otherPlayerId)\n .addOnSuccessListener(new OnSuccessListener\u003cIntent\u003e() {\n @Override\n public void onSuccess(Intent intent) {\n startActivityForResult(intent, RC_SHOW_PROFILE);\n // ...\n }});\n\nIf the game has its own name for players, these can be added to the API call.\nThis enables Play Games to set the nickname of players who send friend\ninvitations from within your game to \"\\\u003cgame-specific-name\\\u003e from\n\\\u003cyour-game-name\\\u003e\" Play Games automatically appends \"from\n\\\u003cyour-game-name\\\u003e\"): \n\n // Show a player profile within the game, with additional hints containing the\n // game-specific names for both players.\n // - otherPlayerId is the Play Games playerId of the player to view.\n // - otherPlayerInGameName is the game-specific name of the player being viewed.\n // - currentPlayerInGameName is the game-specific name of the player who is signed\n // in. Hence if the player sends an invitation to the profile they are viewing,\n // their game-specific name can be included.\n PlayGames.PlayersClient(this)\n .getCompareProfileIntentWithAlternativeNameHints(otherPlayerId, otherPlayerInGameName, currentPlayerInGameName)\n .addOnSuccessListener(new OnSuccessListener\u003cIntent\u003e() {\n @Override\n public void onSuccess(Intent intent) {\n startActivityForResult(intent, RC_SHOW_PROFILE);\n // ...\n }});"]]