在某些设备上使用热POS打印机时，UsbConnection.bulktransfer返回-1

如何解决在某些设备上使用热POS打印机时，UsbConnection.bulktransfer返回-1

我正在研究项目，我需要使用热敏打印机打印支票，该支票已连接到android设备。一切在xiaomi（android 9）上都可以正常工作，但是当尝试在其他设备（三星galaxy选项卡（android 8）和galaxy j3（android 6））上打印支票时，bulktransfer返回-1。

MainActivity类：Activity（）{

/***/

/***/
var mPermissionIntent: PendingIntent? = null
var device: UsbDevice? = null
var manager: UsbManager? = null
var connection: UsbDeviceConnection? = null
var myInterface: UsbInterface? = null
var myEndpoint: UsbEndpoint? = null
var usbRequest: UsbRequest? = null

fun toast(value: String) {
    Toast.makeText(this,value,Toast.LENGTH_SHORT).show()
}

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    Log.d("FROMAIR","working")
    connect!!.setOnClickListener {
        textView!!.text = ""
        checkInfo()
    }
    print!!.setOnClickListener {
        printSomeData()
    }
    val bmpWidth = 180
    sasha_btn.setOnClickListener {
        val tv = Integer
            .toHexString(if (bmpWidth % 8 == 0) bmpWidth / 8 else bmpWidth / 8 + 1)

        toast(tv)
    }
}

private fun printSomeData() {
    GlobalScope.launch(Dispatchers.IO) {
        synchronized(this) {
            try {


            var bytes: ByteArray = byteArrayOf(0x1B,0x74,0x11)
            connection!!.bulkTransfer(myEndpoint,bytes,bytes.size,10000)
            for (i in 0..4) {
                //print text
                var text: String = to_printer_text.text.toString()
                bytes = text.toByteArray(Charset.forName("Cp866"))
                var res = connection!!.bulkTransfer(myEndpoint,10000)
                bytes = byteArrayOf(0x0A)
                connection!!.bulkTransfer(myEndpoint,10000)
            }
            }catch (e:Exception){
                Log.d("EXCEPTION","UNABLE TO PRINT CHECK")
                e.printStackTrace()
            }
        }
    }
}

private fun checkInfo() {
    manager = getSystemService(USB_SERVICE) as UsbManager
    /*
     * this block required if you need to communicate to USB devices it's
     * take permission to device
     * if you want than you can set this to which device you want to communicate
     */
    // ------------------------------------------------------------------
    mPermissionIntent = PendingIntent.getBroadcast(
        this,Intent(
            ACTION_USB_PERMISSION
        ),0
    )
    val filter = IntentFilter(ACTION_USB_PERMISSION)
    registerReceiver(mUsbReceiver,filter)
    // -------------------------------------------------------------------
    val deviceList = manager!!.deviceList
    val deviceIterator: Iterator<UsbDevice> = deviceList.values.iterator()
    var i = ""
    while (deviceIterator.hasNext()) {
        device = deviceIterator.next()
        manager!!.requestPermission(device,mPermissionIntent)
        i += """

            Interface0: ${device!!.getInterface(0).id}
            Endpoint0: ${device!!.getInterface(0).getEndpoint(0).direction}
             Interface1: ${device!!.getInterface(1).id}
            Endpoint0: ${device!!.getInterface(1).getEndpoint(0).direction} 
             Interface1: ${device!!.getInterface(1).id}
            Endpoint1: ${device!!.getInterface(1).getEndpoint(1).direction}
            """
    }
    textView!!.text = i
}

private val mUsbReceiver: BroadcastReceiver = object : BroadcastReceiver() {
    override fun onReceive(context: Context,intent: Intent) {
        val action = intent.action
        if (ACTION_USB_PERMISSION == action) {
            synchronized(this) {
                val device = intent
                    .getParcelableExtra<Parcelable>(UsbManager.EXTRA_DEVICE) as UsbDevice?
                if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,false)) {
                    if (device != null) {

                        myInterface = device.getInterface(1)
                        myEndpoint = myInterface!!.getEndpoint(0)
                        connection = manager!!.openDevice(device)
                        usbRequest = UsbRequest()
                        usbRequest!!.initialize(connection,myEndpoint)
                    } else {

                    }
                } else {
                    Log.d("ERROR","permission denied for device $device")
                    Toast.makeText(
                        context,"PERMISSION DENIED FOR THIS DEVICE",Toast.LENGTH_SHORT
                    ).show()
                }
            }
        }
    }
}

companion object {
    private const val ACTION_USB_PERMISSION = "com.mitapp.myapplication.USB_PERMISSION"
}

}