Job offer AIDL to B4A library

package com.device.n18jsrv;

/// interface to communicate with device
/**
    In18Callback.Stub callback = new In18Callback.Stub() {
        public void onDisplay(final byte type, final String message) throws RemoteException {
            runOnUiThread(new Runnable() {
                public void run() {
                    if (dialog != null)
                        dialog.dismiss();
                    if (message != null)
                        dialog = new AlertDialog.Builder(MainActivity.this)
                            .setMessage(message)
                            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialogInterface, int i) {
                                    try {
                                        binder.sendOK();
                                    } catch (RemoteException e) {
                                        e.printStackTrace();
                                    }
                                }
                            })
                            .setNegativeButton("C", new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialogInterface, int i) {
                                    try {
                                        binder.sendC();
                                    } catch (RemoteException e) {
                                        e.printStackTrace();
                                    }
                                }
                            }).show();
                }
            });
        }
    };
*/
interface In18Callback {
    /// new screen callback event.
    /**
        type -- describe type of screen received:
            NORMAL(0) -- no information (message == null).
            MESSAGE(1) -- Needs confirmation with OK key.
            INFORMATION(2) -- Needs confirmation with OK key.
            QUESTION(3) -- Question, needs response C(NO) or OK(YES).
            CONFIRMATION(4) -- Confirmation, needs response C(NO) or OK(YES).
            WARNING(5) -- Warning confirmation with OK key.
            ERROR(6) -- Error confirmation with C key.
            PAPER_ERROR(7) -- Paper error confirmation with C key.
            TEXT(8) -- Text information
            BIOS(9) --  Bios error confirmation with C key.
            SYSTEM_ERROR(10) -- System error confirmation with C key.
            PROGRESS(11) -- Progress info
            message -- string contains message
    */
    void onDisplay(int type, String message);
}

package com.device.n18jsrv;

import com.device.n18jsrv.In18Callback;

/// interface to communicate with device
/**
    In18Service binder;

    ServiceConnection connection = new ServiceConnection() {
        public void onServiceConnected(ComponentName name, IBinder service) {
            binder = In18Service.Stub.asInterface(service);
            try {
                binder.registerCallback(callback);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }
        public void onServiceDisconnected(ComponentName name) {
            binder = null;
        }
    };

    public void onCreate(Bundle savedInstanceState) {
       Intent intent = new Intent() {{
            setClassName("com.device.n18jsrv", "com.device.n18jsrv.n18JService");
        }};
        bindService(intent, connection, 0);
    }

    protected void onDestroy() {
        if (binder != null) {
            unbindService(connection);
    }
*/
interface In18Service {

    /// Listener registration.
    /**
         To receive informations set In18Callback interface to service
    */
    void registerCallback(In18Callback callback);

    /// Unregistered listener.
    /**
        It is necessary for proper working of service to unregister unused listener.
    */
    void unregisterCallback(In18Callback callback);

    /// Send C key
    void sendC();

    /// Send OK key
    void sendOK();


    /// set/get port remap
    /**
        bios_channel -- channel to communicate with device
            PC2(12) -- port PC2
            PRNMON(13) -- printout monitor
        port_number -- port number COM(1-3)
    */
    void setPortRemap(int bios_channel, int port_number);
    int getPortRemap(int bios_channel);


     ///  set/get remap options
    /**
        bios_channel -- channel for communication with device /  COM port
            COM1(1)
            COM2(2)
            COM3(3)
            PC2(12) -- port PC2
            PRNMON(13) --printout monitor
        speed :
            9600(1)
            19200(2)
            38400(3)
            57600(4)
            115200(5)
        data_bit :
            5(0x10)
            7(0x20)
            8(0x30)
        stop_bit :
            1(0x000)
            1.5(0x100)
            2(0x200)
        parity
            NONE(0x0000)
            ODD(0x1000)
            EVEN(0x2000)
    */
    int getPortSpeed(int bios_channel);
    int getPortDataBit(int bios_channel);
    int getPortStopBit(int bios_channel);
    int getPortParity(int bios_channel);
    void setPortOps(int bios_channel, int speed, int data_bit, int stop_bit, int parity);

    /// get/set speaker level
    /**
        valules range: 0(muted) .. 7(max loudness)
        retuned -1 means error.
    */
    int getBuzzerVolume();
    void setBuzzerVolume(int volume);
    void testBuzzerVolume();


    /// Selected components update in recovery mode
    /*
        file --  path to update file in /cache/ or /data/
    */
    void recoveryUpgrade(in String file);

    /// factory reset
    void wipeUserData();
    void wipeCache();
    void comPower(int com, int on);
}