android - Firebase 登录不适用于较低的 Android 版本

Question

所以我使用 firebase 在我的 android 应用程序中集成了 Google 和 Facebook SignIn，到目前为止它在更高的 android 版本上运行良好，如 9.0 (android P)、8.0 (android oreo) 和 7.0 (android nogut)，但不工作在 android kitkat (4.4)、lollipop (5.0) 等较低版本的 android 设备上

我不知道出了什么问题，它也没有显示任何日志，绝对没有。我还在 Play 商店中发布了我的应用程序，但后来才知道它在某些设备上无法运行。此外，我已经在 firebase 控制台上添加了发布 SHA1 key 。

这是我实现登录的方式，

 @Override
    public 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);

        // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
        if (requestCode == G_SIGN_IN) {
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
            try {
                GoogleSignInAccount account = task.getResult(ApiException.class);
                firebaseAuthWithGoogle(Objects.requireNonNull(account));
            } catch (ApiException e) {
                Tools.createSnackBar(LoginActivity.this,"Google sign in failed! " + e.getLocalizedMessage(),Snackbar.LENGTH_SHORT).show();
                Log.d(TAG, e.getLocalizedMessage());
                googleBtn.setEnabled(true);
                pb.hide();
            }
        }
    }






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


        googleBtn = findViewById(R.id.google_btn);
        facebookBtn =   findViewById(R.id.facebook_btn);
        pb = findViewById(R.id.pb);
        pb.hide();

        mAuth = FirebaseAuth.getInstance();
        functions = new FirebaseFunctions(LoginActivity.this);


        //Google SignIn
        final GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.clientId))
                .requestEmail()
                .build();
        final GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(this, gso);

        googleBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                googleBtn.setEnabled(false);
                pb.show();
                Intent signInIntent = mGoogleSignInClient.getSignInIntent();
                startActivityForResult(signInIntent, G_SIGN_IN);
            }
        });



        //Facebook SignIn
        mCallbackManager = CallbackManager.Factory.create();
        facebookBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                final LoginManager loginManager = LoginManager.getInstance();
                loginManager.logInWithReadPermissions(LoginActivity.this, Arrays.asList(EMAIL, PROFILE));
                facebookBtn.setEnabled(false);

                loginManager.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
                    @Override
                    public void onSuccess(LoginResult loginResult) {
                        handleFacebookSignIn(loginResult.getAccessToken());
                    }

                    @Override
                    public void onCancel() {
                        Tools.createSnackBar(LoginActivity.this,"Login cancelled",Snackbar.LENGTH_SHORT).show();
                        facebookBtn.setClickable(true);
                    }

                    @Override
                    public void onError(FacebookException error) {
                        Tools.createSnackBar(LoginActivity.this,error.getMessage(),Snackbar.LENGTH_SHORT).show();
                        Log.d(TAG,error.getLocalizedMessage());
                        facebookBtn.setClickable(true);
                    }
                });
            }
        });

    }







  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()) {

                            FirebaseUser user = mAuth.getCurrentUser();
                            //Add new user
                            if (user != null) {
                                functions.addNewUser(user.getDisplayName(),user.getEmail(), Objects.requireNonNull(user.getPhotoUrl()).toString(), false, pb);
                            }

                        } else {
                            Tools.createSnackBar(LoginActivity.this,"Authentication Failed " + task.getException(),Snackbar.LENGTH_SHORT).show();
                            if(task.getException()!=null) {
                                Log.e(TAG, task.getException().getLocalizedMessage());
                            }
                            googleBtn.setEnabled(true);
                            pb.hide();
                        }

                    }
                });
    }





    private void handleFacebookSignIn(AccessToken accessToken) {

        pb.show();
        final AuthCredential credential = FacebookAuthProvider.getCredential(accessToken.getToken());
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {

                            FirebaseUser user = mAuth.getCurrentUser();
                            //Add new user
                            if (user != null) {
                                String email = user.getEmail();
                                String photoUrl = Objects.requireNonNull(user.getPhotoUrl()).toString();
                                photoUrl = photoUrl + "?height=500";
                                if(email==null){ email = "Email not found";}

                                functions.addNewUser(user.getDisplayName(),email, photoUrl, false, pb);
                            }

                        } else {
                            Tools.createSnackBar(LoginActivity.this,"Authentication failed "+task.getException(),Snackbar.LENGTH_SHORT).show();
                            if(task.getException()!=null) {
                                Log.e(TAG, task.getException().getLocalizedMessage());
                            }
                            facebookBtn.setEnabled(true);
                            pb.hide();
                        }
                    }
                });
    }

Answer 1

所以我终于成功了，这个问题根本与 firebase 或身份验证无关。实际上在 list 中我的 Activity 被设置为 singleInstance = "true"和 noHistory = "true"，所以在我删除它们之后，它工作正常。