בכרטיסייה שיטת כניסה, מפעילים את שיטת הכניסה של Google.
ולוחצים על Save.
כשתופיע בקשה במסוף, מורידים את קובץ התצורה המעודכן של Firebase
(google-services.json), שכולל עכשיו את פרטי לקוח OAuth
שנדרש לכניסה באמצעות חשבון Google.
מעבירים את קובץ התצורה המעודכן הזה לפרויקט ב-Android Studio, מחליפים את קובץ התצורה התואם שכבר לא בתוקף.
(מידע נוסף זמין במאמר הוספת Firebase לפרויקט Android).
אם לתוכנית יש לולאת עדכון שפועלת באופן קבוע (למשל 30 או 60 פעמים בשנייה), אפשר לבדוק את התוצאות פעם אחת בכל עדכון באמצעות Auth::SignInAndRetrieveDataWithCredentialLastResult:
firebase::Future<firebase::auth::AuthResult>result=auth->SignInAndRetrieveDataWithCredentialLastResult();if(result.status()==firebase::kFutureStatusComplete){if(result.error()==firebase::auth::kAuthErrorNone){firebase::auth::AuthResultauth_result=*result.result();printf("Sign in succeeded for `%s`\n",auth_result.user.display_name().c_str());}else{printf("Sign in failed with error '%s'\n",result.error_message());}}
בחלק מהתוכניות יש פונקציות Update שנקראות 30 או 60 פעמים בשנייה.
לדוגמה, יש הרבה משחקים שמבוססים על המודל הזה. תוכניות כאלה יכולות להפעיל את הפונקציות LastResult כדי לבצע סקרים של קריאות אסינכרוניות.
עם זאת, אם התוכנית שלכם מבוססת על אירועים, יכול להיות שתעדיפו לרשום פונקציות קריאה חוזרת (callback).
מתבצעת קריאה לפונקציית קריאה חוזרת (callback) לאחר השלמת העתיד.
voidOnCreateCallback(constfirebase::Future<firebase::auth::User*>&result,void*user_data){// The callback is called when the Future enters the `complete` state.assert(result.status()==firebase::kFutureStatusComplete);// Use `user_data` to pass-in program context, if you like.MyProgramContext*program_context=static_cast<MyProgramContext*>(user_data);// Important to handle both success and failure situations.if(result.error()==firebase::auth::kAuthErrorNone){firebase::auth::User*user=*result.result();printf("Create user succeeded for email %s\n",user->email().c_str());// Perform other actions on User, if you like.firebase::auth::User::UserProfileprofile;profile.display_name=program_context->display_name;user->UpdateUserProfile(profile);}else{printf("Created user failed with error '%s'\n",result.error_message());}}voidCreateUser(firebase::auth::Auth*auth){// Callbacks work the same for any firebase::Future.firebase::Future<firebase::auth::AuthResult>result=auth->CreateUserWithEmailAndPasswordLastResult();// `&my_program_context` is passed verbatim to OnCreateCallback().result.OnCompletion(OnCreateCallback,&my_program_context);}
אם רוצים, אפשר להשתמש בפונקציית callback מסוג למדה.
voidCreateUserUsingLambda(firebase::auth::Auth*auth){// Callbacks work the same for any firebase::Future.firebase::Future<firebase::auth::AuthResult>result=auth->CreateUserWithEmailAndPasswordLastResult();// The lambda has the same signature as the callback function.result.OnCompletion([](constfirebase::Future<firebase::auth::User*>&result,void*user_data){// `user_data` is the same as &my_program_context, below.// Note that we can't capture this value in the [] because std::function// is not supported by our minimum compiler spec (which is pre C++11).MyProgramContext*program_context=static_cast<MyProgramContext*>(user_data);// Process create user result...(void)program_context;},&my_program_context);}
השלבים הבאים
אחרי שמשתמש נכנס לחשבון בפעם הראשונה, נוצר חשבון משתמש חדש שמקושר לפרטי הכניסה – כלומר שם המשתמש והסיסמה, מספר הטלפון או פרטי ספק האימות – שבאמצעותם המשתמש נכנס לחשבון. החשבון החדש הזה מאוחסן כחלק מפרויקט Firebase, וניתן להשתמש בו כדי לזהות משתמש בכל האפליקציות בפרויקט, ללא קשר לאופן שבו המשתמש נכנס לחשבון.
firebase::auth::Useruser=auth->current_user();if(user.is_valid()){std::stringname=user.display_name();std::stringemail=user.email();std::stringphoto_url=user.photo_url();// The user's ID, unique to the Firebase project.// Do NOT use this value to authenticate with your backend server,// if you have one. Use firebase::auth::User::Token() instead.std::stringuid=user.uid();}
בכללי האבטחה של Firebase Realtime Database ו-Cloud Storage, אפשר לקבל את מזהה המשתמש הייחודי של המשתמש שנכנס לחשבון מהמשתנה auth, ולהשתמש בו כדי לקבוע לאילו נתונים למשתמש תהיה גישה.
[[["התוכן קל להבנה","easyToUnderstand","thumb-up"],["התוכן עזר לי לפתור בעיה","solvedMyProblem","thumb-up"],["סיבה אחרת","otherUp","thumb-up"]],[["חסרים לי מידע או פרטים","missingTheInformationINeed","thumb-down"],["התוכן מורכב מדי או עם יותר מדי שלבים","tooComplicatedTooManySteps","thumb-down"],["התוכן לא עדכני","outOfDate","thumb-down"],["בעיה בתרגום","translationIssue","thumb-down"],["בעיה בדוגמאות/בקוד","samplesCodeIssue","thumb-down"],["סיבה אחרת","otherDown","thumb-down"]],["עדכון אחרון: 2025-09-04 (שעון UTC)."],[],[],null,["You can let your users authenticate with Firebase using their Google Accounts by\nintegrating Google Sign-In into your app.\n\nBefore you begin\n\n1. [Add Firebase to your C++ project](/docs/cpp/setup#note_select_platform).\n2. Enable Google as a sign-in method in the Firebase console:\n 1. In the [Firebase console](//console.firebase.google.com/), open the **Auth** section.\n 2. On the **Sign in method** tab, enable the **Google** sign-in method and click **Save**.\n3. When prompted in the console, download the updated Firebase config file (`google-services.json`), which now contains the OAuth client information required for Google sign-in.\n4. Move this updated config file into your Android Studio project, *replacing* the now-outdated corresponding config file. (See [Add Firebase to your Android project](/docs/android/setup#add-config-file).)\n\nAccess the `firebase::auth::Auth` class The `Auth` class is the gateway for all API calls.\n\n1. Add the Auth and App header files: \n\n ```c++\n #include \"firebase/app.h\"\n #include \"firebase/auth.h\"\n ```\n2. In your initialization code, create a [`firebase::App`](/docs/reference/cpp/class/firebase/app) class. \n\n ```c++\n #if defined(__ANDROID__)\n firebase::App* app =\n firebase::App::Create(firebase::AppOptions(), my_jni_env, my_activity);\n #else\n firebase::App* app = firebase::App::Create(firebase::AppOptions());\n #endif // defined(__ANDROID__)\n ```\n3. Acquire the `firebase::auth::Auth` class for your `firebase::App`. There is a one-to-one mapping between `App` and `Auth`. \n\n ```c++\n firebase::auth::Auth* auth = firebase::auth::Auth::GetAuth(app);\n ```\n\nAuthenticate with Firebase\n\n1. Follow instructions for [Android](/docs/auth/android/google-signin#authenticate_with_firebase) and [iOS+](/docs/auth/ios/google-signin#2_implement_google_sign-in) to get an ID token for the Google sign in.\n2. After a user successfully signs in, exchange the ID token for a Firebase credential, and authenticate with Firebase using the Firebase credential: \n\n ```c++\n firebase::auth::Credential credential =\n firebase::auth::GoogleAuthProvider::GetCredential(google_id_token,\n nullptr);\n firebase::Future\u003cfirebase::auth::AuthResult\u003e result =\n auth-\u003eSignInAndRetrieveDataWithCredential(credential);\n ```\n3. If your program has an update loop that runs regularly (say at 30 or 60 times per second), you can check the results once per update with `Auth::SignInAndRetrieveDataWithCredentialLastResult`: \n\n ```c++\n firebase::Future\u003cfirebase::auth::AuthResult\u003e result =\n auth-\u003eSignInAndRetrieveDataWithCredentialLastResult();\n if (result.status() == firebase::kFutureStatusComplete) {\n if (result.error() == firebase::auth::kAuthErrorNone) {\n firebase::auth::AuthResult auth_result = *result.result();\n printf(\"Sign in succeeded for `%s`\\n\",\n auth_result.user.display_name().c_str());\n } else {\n printf(\"Sign in failed with error '%s'\\n\", result.error_message());\n }\n }\n ```\n Or, if your program is event driven, you may prefer to [register a callback on the\n Future](#register_callback_on_future).\n\nRegister a callback on a Future Some programs have `Update` functions that are called 30 or 60 times per second. For example, many games follow this model. These programs can call the `LastResult` functions to poll asynchronous calls. However, if your program is event driven, you may prefer to register callback functions. A callback function is called upon completion of the Future. \n\n```c++\nvoid OnCreateCallback(const firebase::Future\u003cfirebase::auth::User*\u003e& result,\n void* user_data) {\n // The callback is called when the Future enters the `complete` state.\n assert(result.status() == firebase::kFutureStatusComplete);\n\n // Use `user_data` to pass-in program context, if you like.\n MyProgramContext* program_context = static_cast\u003cMyProgramContext*\u003e(user_data);\n\n // Important to handle both success and failure situations.\n if (result.error() == firebase::auth::kAuthErrorNone) {\n firebase::auth::User* user = *result.result();\n printf(\"Create user succeeded for email %s\\n\", user-\u003eemail().c_str());\n\n // Perform other actions on User, if you like.\n firebase::auth::User::UserProfile profile;\n profile.display_name = program_context-\u003edisplay_name;\n user-\u003eUpdateUserProfile(profile);\n\n } else {\n printf(\"Created user failed with error '%s'\\n\", result.error_message());\n }\n}\n\nvoid CreateUser(firebase::auth::Auth* auth) {\n // Callbacks work the same for any firebase::Future.\n firebase::Future\u003cfirebase::auth::AuthResult\u003e result =\n auth-\u003eCreateUserWithEmailAndPasswordLastResult();\n\n // `&my_program_context` is passed verbatim to OnCreateCallback().\n result.OnCompletion(OnCreateCallback, &my_program_context);\n}\n```\nThe callback function can also be a lambda, if you prefer. \n\n```c++\nvoid CreateUserUsingLambda(firebase::auth::Auth* auth) {\n // Callbacks work the same for any firebase::Future.\n firebase::Future\u003cfirebase::auth::AuthResult\u003e result =\n auth-\u003eCreateUserWithEmailAndPasswordLastResult();\n\n // The lambda has the same signature as the callback function.\n result.OnCompletion(\n [](const firebase::Future\u003cfirebase::auth::User*\u003e& result,\n void* user_data) {\n // `user_data` is the same as &my_program_context, below.\n // Note that we can't capture this value in the [] because std::function\n // is not supported by our minimum compiler spec (which is pre C++11).\n MyProgramContext* program_context =\n static_cast\u003cMyProgramContext*\u003e(user_data);\n\n // Process create user result...\n (void)program_context;\n },\n &my_program_context);\n}\n```\n\nNext steps\n\nAfter a user signs in for the first time, a new user account is created and\nlinked to the credentials---that is, the user name and password, phone\nnumber, or auth provider information---the user signed in with. This new\naccount is stored as part of your Firebase project, and can be used to identify\na user across every app in your project, regardless of how the user signs in.\n\n- In your apps, you can get the user's basic profile information from the\n [`firebase::auth::User`](/docs/reference/cpp/class/firebase/auth/user) object:\n\n ```c++\n firebase::auth::User user = auth-\u003ecurrent_user();\n if (user.is_valid()) {\n std::string name = user.display_name();\n std::string email = user.email();\n std::string photo_url = user.photo_url();\n // The user's ID, unique to the Firebase project.\n // Do NOT use this value to authenticate with your backend server,\n // if you have one. Use firebase::auth::User::Token() instead.\n std::string uid = user.uid();\n }\n ```\n- In your Firebase Realtime Database and Cloud Storage\n [Security Rules](/docs/database/security/user-security), you can\n get the signed-in user's unique user ID from the `auth` variable,\n and use it to control what data a user can access.\n\nYou can allow users to sign in to your app using multiple authentication\nproviders by [linking auth provider credentials to an\nexisting user account.](/docs/auth/cpp/account-linking)\n\nTo sign out a user, call [`SignOut()`](/docs/reference/cpp/class/firebase/auth/auth#signout): \n\n```c++\nauth-\u003eSignOut();\n```"]]