小编Aji*_*ith的帖子

    public class LoginActivity extends AppCompatActivity {

    private static final int RC_SIGN_IN = 1;

    @BindView(R.id.activity_login_google_button)
    SignInButton googleButton;
    @BindView(R.id.activity_login_progress)
    ProgressBar progress;

    private GoogleApiClient mGoogleApiClient;
    private FirebaseAuth.AuthStateListener mAuthListener;
    private FirebaseAuth mAuth;

    @State
    boolean isLoading;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        ButterKnife.bind(this);
        Icepick.restoreInstanceState(this, savedInstanceState);

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

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

        mAuth = FirebaseAuth.getInstance();

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) …