ให้คำแนะนำในการลงชื่อเข้าใช้แก่ผู้ใช้

HintRequest hintRequest = new HintRequest.Builder()
        .setHintPickerConfig(new CredentialPickerConfig.Builder()
                .setShowCancelButton(true)
                .build())
        .setEmailAddressIdentifierSupported(true)
        .setAccountTypes(IdentityProviders.GOOGLE)
        .build();

PendingIntent intent = mCredentialsClient.getHintPickerIntent(hintRequest);
try {
    startIntentSenderForResult(intent.getIntentSender(), RC_HINT, null, 0, 0, 0);
} catch (IntentSender.SendIntentException e) {
    Log.e(TAG, "Could not start hint picker Intent", e);
}

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

    if (requestCode == RC_HINT) {
        if (resultCode == RESULT_OK) {
            Credential credential = data.getParcelableExtra(Credential.EXTRA_KEY);
            Intent intent;
            // Check for the user ID in your user database.
            if (userDatabaseContains(credential.getId())) {
                intent = new Intent(this, SignInActivity.class);
            } else {
                intent = new Intent(this, SignUpNewUserActivity.class);
            }
            intent.putExtra("com.mycompany.myapp.SIGNIN_HINTS", credential);
            startActivity(intent);
        } else {
            Log.e(TAG, "Hint Read: NOT OK");
            Toast.makeText(this, "Hint Read Failed", Toast.LENGTH_SHORT).show();
        }
    }

    ...

}

public class SignInActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Intent intent = getIntent();
        Credential credential = intent.getParcelableExtra("com.mycompany.myapp.SIGNIN_HINTS");

        // Pre-fill ID field
        mUsernameView.setText(credential.getId());

        ...
    }

    ...
}

public class SignUpNewUserActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Intent intent = getIntent();
        Credential credential = intent.getParcelableExtra("com.mycompany.myapp.SIGNIN_HINTS");

        // Pre-fill sign-up fields
        mUsernameView.setText(credential.getId());
        mDisplaynameView.setText(credential.getName()); // Might be null.

        ...
    }

    ...
}