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int slotNum = 0;
byte block = 0x3E;
byte[] command = { (byte)0xFF, (byte)0x86, 0x00, 0x00, 0x05, 0x01, 0x00, block , 0x60, 0x00 };
byte[] response = new byte[2];
reader.transmit(slotNum, command, command.length, response, response.length);

class NfcReader : public QObject
{
    Q_OBJECT

public:
    ...
    static NfcReader *getInstance() { return s_instance; }
    ...
signals:
    void tagDetected(); // Поднесли карту к считывателю
    void tagReaded(int number); // Номер шкафчика прочитан
    void tagDisconnected(); // Карту убрали
};

void tagDetected(JNIEnv */*env*/, jobject /*thiz*/)
{
    NfcReader::getInstance()->tagDetected();
}

void tagReaded(JNIEnv */*env*/, jobject /*thiz*/, int number)
{
    NfcReader::getInstance()->tagReaded(number);
}

void tagDisconnected(JNIEnv */*env*/, jobject /*thiz*/)
{
    NfcReader::getInstance()->tagDisconnected();
}

static JNINativeMethod methods[] = {
    {"tagDetected", "()V", (void *)tagDetected},
    {"tagReaded", "(I)V", (void *)tagReaded},
    {"tagDisconnected", "()V", (void *)tagDisconnected}
};

// This method is called immediately after the module is load
JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void */*reserved*/)
{
    JNIEnv *env;
    if (vm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION_1_6) != JNI_OK) {
        qCritical() << "Can't get the enviroument";
        return -1;
    }
    ...
    // Register our native methods
    if (env->RegisterNatives(s_classID, methods, sizeof(methods) / sizeof(methods[0])) < 0) {
        qCritical() << "RegisterNatives failed";
        return -1;
    }
}

    public static native void tagDetected();
    public static native void tagReaded(int number);
    public static native void tagDisconnected();