gistfile1.txt

    private void xxx() {
        Log.i("CHEOK", "xxx");

        GetGoogleIdOption googleIdOption = new GetGoogleIdOption.Builder()
                .setFilterByAuthorizedAccounts(true)
                .setAutoSelectEnabled(true)
                .setServerClientId(Constants.WENOTE_CLOUD_STORAGE_CLIENT_ID)
                .setNonce("NONCE")
                .build();
        androidx.credentials.GetCredentialRequest request = new androidx.credentials.GetCredentialRequest.Builder()
                .addCredentialOption(googleIdOption)
                .build();

        Context context = getContext();

        CredentialManager credentialManager = CredentialManager.create(context);

        credentialManager.getCredentialAsync(
                context,
                request,
                null,   // pass in a CancelationSignal to allow cancelling the request
                Runnable::run,          // Execute the callback immediately
                new CredentialManagerCallback<GetCredentialResponse, GetCredentialException>() {
                    @Override
                    public void onResult(@NonNull GetCredentialResponse result) {
                        android.util.Log.i("CHEOK", "onResult " + result);

                        if (result != null) {
                            GoogleIdTokenCredential credential = (GoogleIdTokenCredential) result.getCredential();
                            android.util.Log.i("CHEOK", credential.getId());
                            android.util.Log.i("CHEOK", credential.getDisplayName());
                        } else {
                            android.util.Log.i("CHEOK", "ERROR!!!");
                        }
                    }

                    @Override
                    public void onError(@NonNull GetCredentialException e) {
                        android.util.Log.i("CHEOK", "onError " + e);
                    }
                }
        );
    }