Android FireBase - 连接到游戏服务排行榜

Question

我使用 firebase 进行了登录活动以连接谷歌。用户可以毫无问题地登录现在我想在另一个活动中显示排行榜但是，当我检查用户是否已登录并尝试显示排行榜时出现错误：

E/UncaughtException: java.lang.IllegalStateException: GoogleApiClient 必须连接。

如何使用 Firebase 连接 GoogleApiClient？我尝试过使用mGoogleApiClient.connect(GoogleApiClient.SIGN_IN_MODE_OPTIONAL);，但这也不起作用。

这是我的代码：

      protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_achievements);


                // Configure Google Sign In
                GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                        .requestIdToken(getString(R.string.default_web_client_id))
                        .requestEmail()
                        .build();

                mGoogleApiClient = new GoogleApiClient.Builder(this)
                        .enableAutoManage(this, new GoogleApiClient.OnConnectionFailedListener() {
                            @Override
                            public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
                                // connection failed, should be handled
                            }
                        })
                        .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
                        .build();

                mAuth = FirebaseAuth.getInstance();

                mAuthListener = new FirebaseAuth.AuthStateListener() {
                    @Override
                    public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                        FirebaseUser user = firebaseAuth.getCurrentUser();
                        if (user != null) {
                            // User is signed in
                            Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());

     ////// is crashing googleapiclient not connected

startActivityForResult(Games.Leaderboards.getLeaderboardIntent(mGoogleApiClient,
                                    getString(R.string.leaderboard_la_classifica)), REQUEST_LEADERBOARD); 

                        } else {
                            // User is signed out
                        }
                        // ...
                    }
                };

            }

Answer 1

请参阅https://firebase.google.com/docs/auth/android/google-signin 了解更多详情。

在构建客户端时，需要使用 GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
       setContentView(R.layout.fragment_firebase_games_signin);

     String webclientId = getString(R.string.web_client_id);

    GoogleSignInOptions options =
            new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_GAMES_SIGN_IN)
                    .requestServerAuthCode(webclientId)
                    .requestEmail()
                    .requestIdToken()
                    .build();

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Games.API).addScope(Games.SCOPE_GAMES)
            .addApi(Auth.GOOGLE_SIGN_IN_API, options)
            .addConnectionCallbacks(this)
            .build();

}

然后要启动显式登录，请启动 signIn Intent：

private void signIn() {
    Intent signInIntent =
         Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
}

您还应该使用自动管理的客户端，或者直接在onStart() 中调用mGoogleApiClient.connect(GoogleApiClient.SIGN_IN_MODE_OPTIONAL); 并在onStop() 中断开连接。

在onActivityResult中，处理显式登录intent的结果：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
    if (requestCode == RC_SIGN_IN) {
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        if (result.isSuccess()) {
            // Google Sign In was successful, authenticate with Firebase
            GoogleSignInAccount acct = result.getSignInAccount();

            completeFirebaseAuth(acct);

            // At this point, the Games API can be called.

        } else {
            // Google Sign In failed, update UI appropriately
            // ...
        }
    }
}

完成 Firebase 身份验证：

private void completeFirebaseAuth(GoogleSignInAccount  acct) {
    AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
    FirebaseAuth mAuth = FirebaseAuth.getInstance();
    mAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new
                    OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    Log.d(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());

                    // If sign in fails, display a message to the user. If sign in succeeds
                    // the auth state listener will be notified and logic to handle the
                    // signed in user can be handled in the listener.
                    if (!task.isSuccessful()) {
                        Log.w(TAG, "signInWithCredential", task.getException());
                    }
                    // ...
                }
            });
}

您需要处理的另一种情况是静默登录，在恢复应用时发生：

@Override
public void onConnected(@Nullable Bundle bundle) {

    // Handle the silent sign-in case.

    if (mGoogleApiClient.hasConnectedApi(Games.API)) {
        Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient).setResultCallback(
                new ResultCallback<GoogleSignInResult>() {
                    @Override
                    public void onResult(
                            @NonNull GoogleSignInResult googleSignInResult) {
                        if (googleSignInResult.isSuccess()) {
                            completePlayGamesAuth(
                                    googleSignInResult.getSignInAccount());
                        } else {
                            Log.e(TAG, "Error with silentSignIn: " +
                                    googleSignInResult.getStatus());
                        }
                    }
                }
        );
    }
}