public class MainActivity extends Activity {

    private final UsbPermissionResolver usbPermissionResolver = new UsbPermissionResolver();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ...
        usbPermissionResolver.checkPermission(getIntent(), this);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        usbPermissionResolver.checkPermission(intent, this);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        usbPermissionResolver.unregister(this);
    }
    
    ...
    
}

    @Override
    public ProcessingContinuation onCard(BankCard bankCard) {

        setStatus("onCard: %s", bankCard);

        return ProcessingContinuation.Builder
                .startSaleOnline()
                .processingBaseUrl  ( Config.SERVER_BASE_URL)
                .merchantLogin      ( Config.MERCHANT_LOGIN )
                .merchantControlKey ( Config.MERCHANT_KEY   )
                .merchantEndPointId ( Config.END_POINT_ID   )
                .orderDescription   ( "test description"    )
                .orderInvoiceNumber ( "invoice-"+System.currentTimeMillis())
                .orderMerchantData  ( "custom merchant data for a internal use")
                .customerPhone      ( "+7 499 918-64-41"    )
                .customerEmail      ( "[email protected]" )
                .customerCountry    ( "RUS"                 )
                .listener(new IProcessingStageListener() {
                    @Override
                    public void onStageChanged(ProcessingStageEvent aEvent) {
                        setStatus("processing: %s", aEvent);
                    }
                })
                .build();

    }

    @Override
    public void onReaderSerialNumber(String aKsn) {
        setStatus("onReaderSerialNumber: %s", aKsn);
    }

    @Override
    public void cardReaderStateChanged(CardReaderEvent cardReaderEvent) {
        setStatus("cardReaderStateChanged: %s", cardReaderEvent);
    }

    @Override
    public void onCardError(CardError cardError) {
        setStatus("onCardError: %s", cardError);
    }

    @Override
    public void onReaderNotSupported(CardReaderProblem aProblem) {
        setStatus("onReaderNotSupported: %s", aProblem);
    }

    @Override
    public void onAudioData(short[] shorts, int i) {
        // for visualization
    }

    @Override
    public ConfigurationContinuation onConfiguration() {
        return new ConfigurationContinuation.Builder()
                .configDir              ( new File(activity.getFilesDir(), "miura-config"))
                .configurationBaseUrl   ( Config.SERVER_CONFIG_URL  )
                .merchantLogin          ( Config.MERCHANT_LOGIN     )
                .merchantControlKey     ( Config.MERCHANT_KEY       )
                .merchantEndPointId     ( Config.END_POINT_ID       )
                .build();
    }

CardReaderInfo cardReader = CardReaderInfo.TEST;
BigDecimal amount = new BigDecimal(1);
String currency = "RUB";

SimpleCardReaderPresenter presenter = new SimpleCardReaderPresenter(this, statusView);
cardReaderManager = CardReaderFactory.findManager(this, cardReader, presenter, amount, currency, null);