Google登录无法在我的应用中使用

Question

Google登录我的Android应用程序无效。

这是我的代码（来自https://developers.google.com/identity/sign-in/android/sign-in）：

 public class Login extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {
    GoogleApiClient mGoogleApiClient;
    private static final String TAG = MainActivity.class.getSimpleName();
    private static final int RC_SIGN_IN = 007;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);


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

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
                .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
                .build();

        SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
        signInButton.setSize(SignInButton.SIZE_STANDARD);
        signInButton.setScopes(gso.getScopeArray());
        findViewById(R.id.sign_in_button).setOnClickListener(this);


    }


    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.sign_in_button:
                signIn();
                break;
            // ...
        }

    }
    private void signIn() {
        Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
        startActivityForResult(signInIntent, RC_SIGN_IN);
    }
    @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) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            handleSignInResult(result);
        }
    }
    private void handleSignInResult(GoogleSignInResult result) {
        Log.d(TAG, "handleSignInResult:" + result.isSuccess());
        if (result.isSuccess()) {
            // Signed in successfully, show authenticated UI.
            GoogleSignInAccount acct = result.getSignInAccount();
            //mStatusTextView.setText(getString(R.string.signed_in_fmt, acct.getDisplayName()));
            //updateUI(true);
            assert acct != null;
            Toast.makeText(Login.this, acct.getDisplayName(), Toast.LENGTH_SHORT).show();
        } else {
            // Signed out, show unauthenticated UI.
            //updateUI(false);
        }
    }
}

我在logcat中检查没有任何错误..但是当我点击谷歌登录按钮时它没有显示任何内容并且应用程序自动关闭