Hi All, 

I would like to highlight the process to connect programmatically any android tablet to RFID reader and read tags. SO basically what i did, Downloaded latest RFID SDK (2.0.3.162) and unzip it and added inside Lib folder of android studio(Ladybug) and build gradle(8.7) Added code in my kotlin project to connect reader, where my RFID Reader is FX9600.

Source Code:

import android.os.Bundle
import android.os.StrictMode
import android.os.StrictMode.ThreadPolicy
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import com.dcs.sanitrader.R
import com.dcs.sanitrader.databinding.ActivityRfidScanBinding
import com.dcs.sanitrader.databinding.HomepageBinding
import com.zebra.rfid.api3.ENUM_TRANSPORT
import com.zebra.rfid.api3.InvalidUsageException
import com.zebra.rfid.api3.OperationFailureException
import com.zebra.rfid.api3.RFIDReader
import com.zebra.rfid.api3.ReaderDevice
import com.zebra.rfid.api3.Readers
import com.zebra.rfid.api3.RfidEventsListener
import com.zebra.rfid.api3.RfidReadEvents
import com.zebra.rfid.api3.RfidStatusEvents


class RFIDActivity : AppCompatActivity() {

    private var rfidReader: RFIDReader? = null
    private var readersList: Readers? = null
    private var readerDevice: ReaderDevice? = null
    private lateinit var connectionEventHandler: EventHandler
    private lateinit var binding: ActivityRfidScanBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityRfidScanBinding.inflate(layoutInflater)
        setContentView(binding.root)
        enableEdgeToEdge()

        val policy = ThreadPolicy.Builder().permitAll().build()
        StrictMode.setThreadPolicy(policy)

        // Initialize the RFID reader

        binding.startScanButton.setOnClickListener { initializeRFIDReader() }
    }

    private fun initializeRFIDReader() {
        try {
            // Initialize readers
            readersList = Readers(this, ENUM_TRANSPORT.SERVICE_USB)
            //binding.tagDataTextview.text = "RFID Reader is connecting by SERVICE_USB"
            val availableRFIDReaderList = readersList?.GetAvailableRFIDReaderList()
            if (!availableRFIDReaderList.isNullOrEmpty()) {
                readerDevice = availableRFIDReaderList[0]
                rfidReader = readerDevice?.rfidReader
                connectToRFIDReader()
            } else {
                //binding.tagDataTextview.text = "RFID Reader is not connected"
                Toast.makeText(this, "No RFID readers available", Toast.LENGTH_SHORT).show()
            }
        } catch (e: Exception) {
            e.printStackTrace()
        }
    }

    private fun connectToRFIDReader() {
        try {
            if (rfidReader != null && !rfidReader!!.isConnected) {
                // Connect to the RFID reader
                rfidReader?.connect()
                //binding.tagDataTextview.text = "RFID Reader is connected"
                Toast.makeText(this, "RFID Reader connected", Toast.LENGTH_SHORT).show()
                // Set up the RFID tag event handler
                setupReaderHandlers()
                // Enable tag reading (once connected)
                rfidReader?.Actions?.Inventory?.perform()
            }
        } catch (e: InvalidUsageException) {
            e.printStackTrace()
            //binding.tagDataTextview.text = "RFID Reader error: ${e.printStackTrace()}"
        } catch (e: OperationFailureException) {
            e.printStackTrace()
            //binding.tagDataTextview.text = "RFID Reader error ${e.printStackTrace()}"
        }
    }

    private fun setupReaderHandlers() {
        // Set up event handler for tag data
        rfidReader?.Events?.addEventsListener(connectionEventHandler)

        // Configure event notifications (enable RFID data capture)
        rfidReader?.Events?.apply {
            setInventoryStartEvent(true)
            setInventoryStopEvent(true)
            setTagReadEvent(true)
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        // Clean up and disconnect when done
        try {
            rfidReader?.disconnect()
        } catch (e: InvalidUsageException) {
            e.printStackTrace()
        } catch (e: OperationFailureException) {
            e.printStackTrace()
        }
    }

    // Define your event handler to capture tag data
    private inner class EventHandler : RfidEventsListener {
        override fun eventReadNotify(e: RfidReadEvents) {
            // This function is called when a tag is read
            val tags = rfidReader?.Actions?.getReadTags(100)//e.readEventData.tagData//rfidReader?.readerCapabilities?.rfidOptions?.rfidTags
            tags?.forEach { tag ->
                runOnUiThread {
                    Toast.makeText(
                        this@RFIDActivity,
                        "Tag scanned: ${tag.tagID}",
                        Toast.LENGTH_SHORT
                    ).show()
                }
                println("Tag read: ${tag.tagID}")
            }
        }

        override fun eventStatusNotify(e: RfidStatusEvents?) {
            // Handle reader status events here
        }
    }
}

 Error:

 The error am getting is as, Operation Failed: Connection error, no RFID reader available

I don't know where am i wrong? and what should be the better approach to connect the reader from tablet? I am also using same network in reader and tablet. Let me know what should i do?