Google登录后自动启动活动- Android Studio

public class LoginActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {

    private GoogleApiClient googleApiClient;

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

        // 初始化Google登录客户端
        GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestEmail()
                .build();
        googleApiClient = new GoogleApiClient.Builder(this)
                .enableAutoManage(this, this)
                .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
                .build();

        // 添加Google登录按钮的点击事件
        SignInButton signInButton = findViewById(R.id.sign_in_button);
        signInButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
                startActivityForResult(signInIntent, RC_SIGN_IN);
            }
        });
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        // 处理连接失败的情况
    }

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

        // 处理Google登录回调结果
        if (requestCode == RC_SIGN_IN) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            handleSignInResult(result);
        }
    }

    private void handleSignInResult(GoogleSignInResult result) {
        if (result.isSuccess()) {
            // 登录成功，启动指定的活动
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
            finish();
        } else {
            // 登录失败，显示错误信息
            Toast.makeText(this, "Google登录失败", Toast.LENGTH_SHORT).show();
        }
    }
}