android - 如何使用 Google 登录从不同的 Activity 中注销用户？

Question

在我的登录 Activity 中，我使用 Google 登录让用户登录。我希望注销按钮处于不同的 Activity 中，但我不确定如何实现它。我在网上寻找解决方案，但所有解决方案都使用已弃用的库。

这是我的登录 Activity 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 Activity 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!

Answer 1

在你想要注销的 Activity 中，你可以做这样的事情:

findViewById(R.id.logout_button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                GoogleSignInClient googleSignInClient = GoogleSignIn.getClient(getApplicationContext(), GoogleSignInOptions.DEFAULT_SIGN_IN);
                signOut(googleSignInClient);
                revokeAccess(googleSignInClient);
            }
        });

可以找到signOut() 和revokeAccess() 的定义here .

重要的是，在这两个 Activity 中，您将应用程序上下文而不是 Activity 上下文传递给 GoogleSignIn.getClient()。