java - 使用 Android 登录 Google 连接时出现错误

Question

您好，我的 google 连接有问题。每次执行该代码时，它都会进入 catch 处。我不知道为什么。我按照Google教程中的步骤进行操作，并在堆栈上看到了许多与该问题相关的问题，但仍然无法帮助我解决这个问题。当代码运行时，它会进入捕获并显示我制作的 toast 。 “错误而..”。

它是这样的。我发布了验证的完整代码，以便每个人都可以分析它并在可能的情况下给我一个解决方案。

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

        GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.default_web_client_id))
                .requestEmail()
                .build();
        mGoogleSignInClient= GoogleSignIn.getClient(this,gso);

        signInButton=(SignInButton)findViewById(R.id.googleButton);
        signInButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                Intent signInIntent = mGoogleSignInClient.getSignInIntent();
                startActivityForResult(signInIntent, RC_SIGN_IN);
            }
        });
        //pour google
        mAuthStateListener=new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser mFireBaseUser=mFirebaseAuth.getCurrentUser();
                if(mFireBaseUser != null){
                    Toast.makeText(LoginActivity.this,"you are logged in",Toast.LENGTH_SHORT).show();
                    Intent i= new Intent(LoginActivity.this, PrayersEvents.class);
                    startActivity(i);
                }
                else{
                    Toast.makeText(LoginActivity.this,"please login",Toast.LENGTH_SHORT).show();
                }
            }
        };
        btnSignIn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email=emailId.getText().toString();
                String pwd=password.getText().toString();
                if (email.isEmpty()) {
                    emailId.setError("Please enter email");
                    emailId.requestFocus();
                }
                else if(pwd.isEmpty()){
                    password.setError("Please enter your password");
                    password.requestFocus();
                }
                else if(email.isEmpty() || pwd.isEmpty()){
                    Toast.makeText(LoginActivity.this,"Fields are empty!",Toast.LENGTH_SHORT).show();
                }
                else if(!(email.isEmpty() && pwd.isEmpty())){
                    mFirebaseAuth.signInWithEmailAndPassword(email,pwd).addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if(!task.isSuccessful()){
                                Toast.makeText(LoginActivity.this,"Login error!",Toast.LENGTH_SHORT).show();

                            }
                            else{
                                Intent intoHome=new Intent(LoginActivity.this, PrayersEvents.class);
                                startActivity(intoHome);
                            }
                        }
                    });
                }
                else{
                    Toast.makeText(LoginActivity.this,"Error ocurred!",Toast.LENGTH_SHORT).show();

                }
            }
        });
        tvSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intoSignUp=new Intent(LoginActivity.this,MainActivity.class);
                startActivity(intoSignUp);
            }
        });
    }
    @Override
    protected void onStart() {
        super.onStart();

        GoogleSignInAccount account=GoogleSignIn.getLastSignedInAccount(this);
        if(account !=null){
            startActivity(new Intent(LoginActivity.this, CreateEvent.class));
        }
    }
    @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) {
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
            try {
                // Google Sign In was successful, authenticate with Firebase
                GoogleSignInAccount account = task.getResult(ApiException.class);
                Log.d("MON_TAG", account.toString());
                firebaseAuthWithGoogle(account);
            } catch (ApiException e) {
                // Google Sign In failed, update UI appropriately
                Toast.makeText(getApplicationContext(),"error while logging in",Toast.LENGTH_SHORT).show();

                Log.w("errorMsg","Google sign in failed", e);
                // ...
            }
        }
    }

    private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {//acct means account
        Log.d("MON_TAG", "firebaseAuthWithGoogle:" + acct.getId());
        AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
        mFirebaseAuth.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("MON_TAG", "signInWithCredential:success");
                            FirebaseUser user = mFirebaseAuth.getCurrentUser();
                            startActivity(new Intent(LoginActivity.this, CreateEvent.class));
                            Toast.makeText(getApplicationContext(),"You are now connected",Toast.LENGTH_SHORT).show();
                        } else {
                            GoogleSignInAccount account=GoogleSignIn.getLastSignedInAccount(getApplicationContext());
                            if(account !=null){
                                startActivity(new Intent(LoginActivity.this, CreateEvent.class));
                            }
                            // If sign in fails, display a message to the user.
                            Toast.makeText(getApplicationContext(),"Could not log in user",Toast.LENGTH_SHORT).show();
                        }
                    }
                });
    }

Answer 1

我认为您没有实例化 GoogleApiClient 对象..

尝试这个代码..它对我有用..

//a constant for detecting the login intent result
    private static final int RC_SIGN_IN = 234;

    //Tag for the logs optional
    private static final String TAG = "YoussefIslem";

    //creating a GoogleSignInClient object
    GoogleSignInClient mGoogleSignInClient;

    GoogleApiClient googleApiClient;

    CallbackManager mCallbackManager;

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

        mAuth = FirebaseAuth.getInstance();

        GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.web_client_id))
                .requestEmail()
                .build();

        googleApiClient =new GoogleApiClient.Builder(this)
                .enableAutoManage(this,this)
                .addApi(Auth.GOOGLE_SIGN_IN_API,gso)
                .build();

        //Then we will get the GoogleSignInClient object from GoogleSignIn class
        mGoogleSignInClient = GoogleSignIn.getClient(this, gso);

        findViewById(R.id.googleContinue).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                signIn();
            }
        });
}

 private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
        Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());

        //getting the auth credential
        AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);

        //Now using firebase we are signing in the user here
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            Log.d(TAG, "signInWithCredential:success");
                            FirebaseUser user = mAuth.getCurrentUser();

                            Toast.makeText(MainActivity.this, "User Signed In", Toast.LENGTH_SHORT).show();
                            Intent intent = new Intent(MainActivity.this, HomeActivity.class);
                            startActivity(intent);
                            finish();

                        } 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();

                        }

                        // ...
                    }
                });
    }


    //this method is called on click
    private void signIn() {
        //getting the google signin intent
        Intent signInIntent = mGoogleSignInClient.getSignInIntent();
        googleApiClient.clearDefaultAccountAndReconnect();

        //starting the activity for result
        startActivityForResult(signInIntent, RC_SIGN_IN);
    }



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

        //if the requestCode is the Google Sign In code that we defined at starting
        if (requestCode == RC_SIGN_IN) {

            //Getting the GoogleSignIn Task
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
            try {
                //Google Sign In was successful, authenticate with Firebase
                GoogleSignInAccount account = task.getResult(ApiException.class);

                //authenticating with firebase
                firebaseAuthWithGoogle(account);
            } catch (ApiException e) {
                Toast.makeText(MainActivity.this,"I'm here"+ e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
}