如何使用 Google 登录从不同的活动中退出用户？

Posted 2023-02-23

【中文标题】如何使用 Google 登录从不同的活动中退出用户？

【英文标题】：How to sign out a user from a different activity with Google Sign-in?

【发布时间】：2019-05-31 14:21:48

【问题描述】：

在我的登录活动中，我正在使用 Google 登录用户登录。我希望注销按钮处于不同的活动中，但我不确定如何实现这一点。我在网上寻找过解决方案，但它们都使用了一个已弃用的库。

这是我的登录活动中的代码：

public class LoginActivity extends AppCompatActivity 

    @BindView(R.id.sign_in_button) SignInButton signInButton;

    public GoogleSignInClient mGoogleSignInClient;
    private int RC_SIGN_IN;
    private static final String TAG = "Login Activity Error";
    private static GoogleSignInOptions gso;


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

        ButterKnife.bind(this);
        signInButton.setSize(SignInButton.SIZE_STANDARD);

        gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestEmail()
                .build();

        mGoogleSignInClient = GoogleSignIn.getClient(getApplicationContext(), gso);

        findViewById(R.id.sign_in_button).setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View view) 
                Intent signInIntent = mGoogleSignInClient.getSignInIntent();
                startActivityForResult(signInIntent, RC_SIGN_IN);

            
        );
    

    @Override
    protected void onStart() 
        super.onStart();
        GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
        updateUI(account);
    

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

        if (requestCode == RC_SIGN_IN) 
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
            handleSignInResult(task);
        
    

    private void handleSignInResult(Task<GoogleSignInAccount> completedTask) 
        try 
            GoogleSignInAccount account = completedTask.getResult(ApiException.class);

            updateUI(account);
         catch (ApiException e) 
            Log.w(TAG, "signInResult:failed code=" + e.getStatusCode());
            updateUI(null);
        
    

    private void updateUI(GoogleSignInAccount account) 
        if (account != null) 
            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
            intent.putExtra(MainActivity.PERSON_NAME, account.getDisplayName());
            intent.putExtra(MainActivity.PERSON_FAMILY_NAME, account.getGivenName());
            intent.putExtra(MainActivity.PERSON_GIVEN_NAME, account.getFamilyName());
            intent.putExtra(MainActivity.PERSON_EMAIL, account.getEmail());
            intent.putExtra(MainActivity.PERSON_ID, account.getId());
            intent.putExtra(MainActivity.PERSON_PHOTO, account.getPhotoUrl());
            startActivity(intent);
        
    

Google 说要使用此代码退出，但我不确定如何更改它以在不同的活动中工作：

private void signOut() 
    mGoogleSignInClient.signOut()
            .addOnCompleteListener(this, new OnCompleteListener<Void>() 
                @Override
                public void onComplete(@NonNull Task<Void> task) 
                    // ...
                
            );

非常感谢任何帮助。谢谢！

【参考方案1】：

仅供参考。这就是我为从除 LoginActivity 之外的活动（HomeActivity）中注销用户所做的工作。您需要做的是在 LoginActivty 中从 onCreate() 或 onStart() 方法调用 signOut() 方法，并在您希望用户退出时从另一个 Activty（在我的情况下为 HomeActivity）启动 LoginActivty。

登录活动

 protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    ...
    ...
       // I've used session to save  current user availibility in shared preference to
       //check if user is already logged in or not
    if (session.isLoggedIn()) 
        // User is already logged in. Take him to main activity
        Intent intent = new Intent(LoginActivity.this,
                HomeActivity.class);
        startActivity(intent);
        finish();
     else 
        //This is what you need to do.
        signOut();
        revokeAccess();
    
    ...
    ...

HomeActivity

    private void logoutUser() 
    session.setLogin(false);
    // Launching the login activity
    Intent intent = new Intent(HomeActivity.this, LoginActivity.class);
    startActivity(intent);
    finish();

希望对你有帮助。

【参考方案2】：

试试这个

使用下面的代码并清除所有保存的数据

if (mGoogleApiClient.isConnected()) 
                Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
                mGoogleApiClient.disconnect();
                mGoogleApiClient.connect();