Firebase facebook and google login error in android

Question

Here is my error screenshot Hello I am trying to login with Google and Facebook but it gives error. com.google.firebase.auth.FirebaseAuthException: This operation is not allowed. You must enable this service in the console. How to solve this error? Do I have also enable the services on firebase how to solve this problem? here is my code

public class LoginActivity extends AppCompatActivity implements
        GoogleApiClient.OnConnectionFailedListener,
        View.OnClickListener {

    private Button btn_sign_up_login, btn_login, btn_gmail_login, btn_facebook_login;
    private ProgressBar pb_sign_up_login, pb_login;
    private FirebaseAuth.AuthStateListener mAuththenticatelistner;
    private GoogleApiClient mGoogleapiclient;
    public static final int RC_GOOGLE_LOGIN = 1;
    private FirebaseAuth mAuth;
    CallbackManager callbackManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        btn_sign_up_login = (Button) findViewById(R.id.btn_sign_up_login);
        callbackManager = CallbackManager.Factory.create();
        btn_login = (Button) findViewById(R.id.btn_login);
        btn_gmail_login = (Button) findViewById(R.id.btn_gmail_login);
        btn_facebook_login = (Button) findViewById(R.id.btn_facebook_login);
        pb_login = (ProgressBar) findViewById(R.id.pb_login);

        ///////////////////////////code for facebook login
        // Initialize Facebook Login button
        callbackManager = CallbackManager.Factory.create();
        LoginButton loginButton = (LoginButton) findViewById(R.id.btn_facebook_login);
        loginButton.setReadPermissions("email", "public_profile");
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {

                handleFacebookAccessTokens(loginResult.getAccessToken());
            }

            @Override
            public void onCancel() {

                // [START_EXCLUDE]
                updateUI(null);
                // [END_EXCLUDE]
            }

            @Override
            public void onError(FacebookException error) {

                // [START_EXCLUDE]
                updateUI(null);
                // [END_EXCLUDE]
            }
        });
        // Configure Google Sign In
        GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.web_api_client_id))
                .requestEmail()
                .build();
        mGoogleapiclient = new GoogleApiClient.Builder(this)
                .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
                .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
                .build();

        mAuth = FirebaseAuth.getInstance();

        btn_sign_up_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(LoginActivity.this, SignUpActivity.class));
            }
        });
        btn_gmail_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                signIn();
            }
        });
        btn_facebook_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });
    }

    private void signIn() {

        Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleapiclient);
        startActivityForResult(signInIntent, RC_GOOGLE_LOGIN);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
        // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
        if (requestCode == RC_GOOGLE_LOGIN) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            if (result.isSuccess()) {
                // Google Sign In was successful, authenticate with Firebase
                GoogleSignInAccount account = result.getSignInAccount();
                firebaseAuthWithGoogle(account);
            } else {
                // Google Sign In failed, update UI appropriately
                // ...
            }
        }
    }

    // [START auth_with_google]
    private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
        AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            FirebaseUser user = mAuth.getCurrentUser();
                            updateUI(user);
                            startActivity(new Intent(LoginActivity.this, DrawerActivity.class));
                            finish();
                        } else {
                            // If sign in fails, display a message to the user.
                            Toast.makeText(LoginActivity.this, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();
                            updateUI(null);
                        }
                    }
                });
    }

    @Override
    public void onStart() {
        super.onStart();
        // Check if user is signed in (non-null) and update UI accordingly.
        FirebaseUser currentUser = mAuth.getCurrentUser();

    }

    @Override
    public void onClick(View view) {

    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        Toast.makeText(this, "Google Play Services error.", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onPointerCaptureChanged(boolean hasCapture) {

    }

    private void updateUI(FirebaseUser user) {

        if (user != null) {
            String mailid = (getString(R.string.google_status_fmt, user.getEmail()));
            String idfor = (getString(R.string.firebase_status_fmt, user.getUid()));

        } else {
        }
    }


    // [START auth_with_facebook]
    private void handleFacebookAccessTokens(AccessToken token) {

        // [END_EXCLUDE]

        AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            FirebaseUser user = mAuth.getCurrentUser();
                            updateUI(user);
                        } else {
                            // If sign in fails, display
                            Toast.makeText(LoginActivity.this, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();
                            updateUI(null);
                        }

                        // [START_EXCLUDE]
                        // [END_EXCLUDE]
                    }
                });
    }
    // [END auth_with_facebook]
}

Answer 1

As the error states, you need to enable the authentication methods in the Firebase console. Navigate to Authentication>Sign-In Method and enable the required methods.