通过android中的firebase进行Facebook登录时身份验证失败

Question

我正在开发一个应用程序，我可以选择用户通过Facebook登录。现在，我正在使用firebase，每当我尝试登录时，我都会收到身份验证失败的消息。它将在下一个活动中进行，但它会说“身份验证失败”消息。这是我的代码。这是我的主要活动： -

public class MainActivity extends AppCompatActivity {

private CallbackManager mCallbackManager;
private FirebaseAuth firebaseAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private TextView txtUser;
private TextView txtEmail;
private ImageView imgProfile;
private LoginButton logoutButton;
private LoginButton loginButton;
private static final String TAG = "MainActivity";
private FirebaseAuth mAuth;
PackageInfo info;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(getApplicationContext());
    AppEventsLogger.activateApp(this);
    setContentView(R.layout.activity_main);

    mAuth = FirebaseAuth.getInstance();

    // Initialize Facebook Login button
    mCallbackManager = CallbackManager.Factory.create();
    LoginButton loginButton = findViewById(R.id.login_button);
    loginButton.setReadPermissions("email", "public_profile");
    loginButton.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            Log.d(TAG, "facebook:onSuccess:" + loginResult);
            handleFacebookAccessToken(loginResult.getAccessToken());
        }

        @Override
        public void onCancel() {
            Log.d(TAG, "facebook:onCancel");
            // ...
        }

        @Override
        public void onError(FacebookException error) {
            Log.d(TAG, "facebook:onError", error);
            // ...
        }
    });


}

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

}

private void updateUI(FirebaseUser currentUser) {

    Toast.makeText(MainActivity.this,"Done",Toast.LENGTH_SHORT);
    Intent intent = new Intent(MainActivity.this,AccountActivity.class);
    startActivity(intent);
    finish();
}

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

    // Pass the activity result back to the Facebook SDK
    mCallbackManager.onActivityResult(requestCode, resultCode, data);
}
private void handleFacebookAccessToken(AccessToken token) {
    Log.d(TAG, "handleFacebookAccessToken:" + token);

    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
                        Log.d(TAG, "signInWithCredential:success");
                        FirebaseUser user = mAuth.getCurrentUser();
                        updateUI(user);
                    } else {
                        // If sign in fails, display a message to the user.
                        Log.w(TAG, "signInWithCredential:failure", task.getException());
                        Toast.makeText(MainActivity.this, "Authentication failed.",
                                Toast.LENGTH_SHORT).show();
                        updateUI(null);
                    }

                    // ...
                }
            });
}
}

现在，我使用以下方法获取了我的哈希键： -

      try {
        PackageInfo info = getPackageManager().getPackageInfo(
                getPackageName(),
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA");
            messageDigest.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(messageDigest.digest(), Base64.DEFAULT));
        }
    }
    catch (PackageManager.NameNotFoundException e) {

    }
    catch (NoSuchAlgorithmException e) {

    }

并把它放在我的fb开发者控制台中。它仍然显示此错误。可以请任何人解释我在这里做错了什么？

当我检查logcat时，此处显示消息： - “发生内部错误。[API密钥无效。请传递有效的API密钥”。我甚至不知道这个API密钥的使用位置。请帮忙。谢谢

Answer 1

在firebase登录之前有一个步骤，您必须在firebase控制台注册您的应用程序。我没有这样做。我做了一个新项目，跟随firebase的每一步。我现在没有收到任何错误。