Friends API 통합 (자바)

// 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.
Games.getPlayersClient(this, GoogleSignIn.getLastSignedInAccount(this))
    .loadFriends(PAGE_SIZE, /* forceReload= */ false)
    .addOnSuccessListener(
        new OnSuccessListener<AnnotatedData<PlayerBuffer>>() {
            @Override
            public void onSuccess(AnnotatedData<PlayerBuffer>  data) {
          PlayerBuffer playerBuffer = data.get();
          // ...
        })

    .addOnFailureListener(
        exception -> {
      if (exception instanceof FriendsResolutionRequiredException) {
        PendingIntent pendingIntent =
            ((FriendsResolutionRequiredException) task.getException())
            .getResolution();
        parentActivity.startIntentSenderForResult(
            pendingIntent.getIntentSender(),
            /* requestCode */ SHOW_SHARING_FRIENDS_CONSENT,
            /* fillInIntent */ null,
            /* flagsMask */ 0,
            /* flagsValues */ 0,
            /* extraFlags */ 0,
            /* options */ null);
     }
   });
 return;
}

/** Handle the activity result from the request for consent. */
@Override
public void onActivityResult(int requestCode, int result, Intent data) {
  if (requestCode == SHOW_SHARING_FRIENDS_CONSENT) {
    if (result == Activity.RESULT_OK) {
      // We got consent from the user to access their friends. Retry loading the friends
      callLoadFriends();
    } else {
      // User did not grant consent.
    }
  }
}

// Retrieve and launch an Intent to show a player profile within the game.
Games.getPlayersClient(this, GoogleSignIn.getLastSignedInAccount(this))
    .getCompareProfileIntent(otherPlayerId)
    .addOnSuccessListener(new OnSuccessListener<Intent>() {
        @Override
        public void onSuccess(Intent  intent) {
          startActivityForResult(intent, RC_SHOW_PROFILE);
          // ...
        }});

// 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.
Games.PlayersClient(this, GoogleSignIn.getLastSignedInAccount(this))
    .getCompareProfileIntentWithAlternativeNameHints(otherPlayerId, otherPlayerInGameName, currentPlayerInGameName)
    .addOnSuccessListener(new OnSuccessListener<Intent>() {
        @Override
        public void onSuccess(Intent  intent) {
          startActivityForResult(intent, RC_SHOW_PROFILE);
          // ...
        }});