При вызове serial.close () мое приложение вызывает sh android

Question

При вызове функции OnClickStop, которая содержит serialPort.close (), мое приложение вылетает. Я буду содержать как мой код xml, так и logcat - может кто-нибудь сообщить мне, где я ошибаюсь?

Ссылка на код: https://codeshare.io/G8xLXE Logcat видно ниже

Мое мобильное устройство подключено к плате Arduino. У меня есть датчик давления, подключенный к моей Arduino. Arduino действует как эхо. После вызова функции onClickSend мой arduino отвечает данными датчика давления. Затем он отправляется на мое мобильное устройство и отображается в виде тепловой карты в функции тепловой карты. Моя панель поиска сохраняет эти значения датчика давления в массиве, где в шкале времени функции - используя панель поиска, я могу воспроизвести значения путем фильтрации по массиву

Почему происходит сбой моего приложения при вызове функции onClickStop ()?

Код

    package com.example.surf10

import android.os.Bundle
import android.view.View
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity

import android.app.PendingIntent
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.graphics.Color
import android.hardware.usb.UsbDevice
import android.hardware.usb.UsbDeviceConnection
import android.hardware.usb.UsbManager
import android.os.Handler
import android.util.Log
import android.widget.SeekBar
import android.widget.TextView
import android.widget.Toast
import com.felhr.usbserial.UsbSerialDevice
import com.felhr.usbserial.UsbSerialInterface
import com.felhr.usbserial.UsbSerialInterface.UsbReadCallback
import kotlinx.android.synthetic.main.activity_surfboard.*
import java.io.UnsupportedEncodingException
import java.util.*
import kotlin.text.Charsets.UTF_8
import kotlin.collections.ArrayList as ArrayList1


class Surfboard : AppCompatActivity() {

    val ACTION_USB_PERMISSION = "com.surf10.USB_PERMISSION"
    var startButton: Button? = null
    var sendButton: Button? = null
    var stopButton: Button? = null
    var textView: TextView? = null
    var textView2: TextView? = null
    var seekText: TextView? = null
    var statusText: TextView? = null
    var usbManager: UsbManager? = null
    var device: UsbDevice? = null
    var serialPort: UsbSerialDevice? = null
    var connection: UsbDeviceConnection? = null
    var reading: String? = null
    var seekBar: SeekBar? = null
    var storeList = arrayListOf<Int>()


    var mCallback = UsbReadCallback { arg0 ->
        //Defining a Callback which triggers whenever data is read.
        //var data: String? = null
        try {
            var data = String(
                arg0,
                UTF_8
            ) //data received will be in raw bites, re-ecncode it into a readable form UTF-8
            heatMap(data) //Printing data to TextView and setting TextView colour
            timescale(data) // Sending data to array for replay of data
        } catch (e: UnsupportedEncodingException) {
            e.printStackTrace()
        }
    }

    private val broadcastReceiver: BroadcastReceiver = object : BroadcastReceiver() {
        //Broadcast Receiver to automatically start and stop the Serial connection.
        override fun onReceive(
            context: Context,
            intent: Intent
        ) {
            if (intent.action == ACTION_USB_PERMISSION) { //if the user has granted permission
                val granted = intent.extras!!.getBoolean(
                    UsbManager.EXTRA_PERMISSION_GRANTED
                )
                if (granted) {
                    connection = usbManager!!.openDevice(device)
                    serialPort = UsbSerialDevice.createUsbSerialDevice(device, connection)
                    if (serialPort != null) {
                        if (serialPort!!.open()) { //Set Serial Connection Parameters.
                            setUiEnabled(true)
                            serialPort!!.setBaudRate(9600) //chosen 9600 baud rate
                            serialPort!!.setDataBits(UsbSerialInterface.DATA_BITS_8) //default parameters for an UNo
                            serialPort!!.setStopBits(UsbSerialInterface.STOP_BITS_1)
                            serialPort!!.setParity(UsbSerialInterface.PARITY_NONE)
                            serialPort!!.setFlowControl(UsbSerialInterface.FLOW_CONTROL_OFF)
                            serialPort!!.read(mCallback)
                            tvAppend(statusText, "Serial Connection Opened!\n")
                        } else {
                            Log.d("SERIAL", "PORT NOT OPEN")
                        }
                    } else {
                        Log.d("SERIAL", "PORT IS NULL")
                    }
                } else {
                    Log.d("SERIAL", "PERM NOT GRANTED")
                }
            } else if (intent.action == UsbManager.ACTION_USB_DEVICE_ATTACHED) {
                onClickStart(startButton) //if USB is attached run the onClickStart function
            } else if (intent.action == UsbManager.ACTION_USB_DEVICE_DETACHED) {
                onClickStop(stopButton) //if USB is detashed run the onClickStop function
            }
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_surfboard)

        usbManager = getSystemService(Context.USB_SERVICE) as UsbManager
        startButton = findViewById<View>(R.id.buttonStart) as Button
        sendButton = findViewById<View>(R.id.activate) as Button
        stopButton = findViewById<View>(R.id.deactivate) as Button
        textView = findViewById<View>(R.id.textView) as TextView
        textView2 = findViewById<View>(R.id.test) as TextView
        seekText = findViewById<View>(R.id.seekText) as TextView
        statusText = findViewById<View>(R.id.statusText) as TextView
        seekBar = findViewById<View>(R.id.seekBar) as SeekBar

        setUiEnabled(false)
        val filter = IntentFilter()
        filter.addAction(ACTION_USB_PERMISSION)
        filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED)
        filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED)
        registerReceiver(broadcastReceiver, filter)

//        val buttons = arrayOf(
////            findViewById<Button>(R.id.b00),
////            findViewById<Button>(R.id.b01),
////            findViewById<Button>(R.id.b02)
//            /*findViewById<Button>(R.id.b10),
//            findViewById<Button>(R.id.b11),
//            findViewById<Button>(R.id.b12),
//            findViewById<Button>(R.id.b20),
//            findViewById<Button>(R.id.b21),
//            findViewById<Button>(R.id.b22)*/
//        )

        //Reading(buttons)


    }

    fun setUiEnabled(bool: Boolean) {
        startButton!!.isEnabled = !bool
        sendButton!!.isEnabled = bool
        stopButton!!.isEnabled = bool
        textView!!.isEnabled = bool
    }

    fun onClickStart(@Suppress("UNUSED_PARAMETER") view: View?) {
        val usbDevices = usbManager!!.deviceList
        if (!usbDevices.isEmpty()) {
            var keep = true
            for ((_, value) in usbDevices) {
                device = value
                val deviceVID = device!!.vendorId
                if (deviceVID == 0x2341) //Arduino Vendor ID
                {
                    val pi =
                        PendingIntent.getBroadcast(this, 0, Intent(ACTION_USB_PERMISSION), 0)
                    usbManager!!.requestPermission(device, pi)
                    keep = false
                } else {
                    connection = null
                    device = null
                }
                if (!keep) break
            }
        }
    }

    fun onClickSend(@Suppress("UNUSED_PARAMETER") view: View?) {
        val string = "g" //data sent to arduino
//        serialPort!!.write(string.toByteArray())
//        tvAppend(statusText, "\nData Sent : " + string)
//        var circuit = 0

        for (i in 1..100) { //sending string 100 times to arduino
            Handler().postDelayed({
                serialPort!!.write(string.toByteArray()) //sending data to arduino
            }, 1000) //delay of 1 second between each message sent
        }

    }

    fun onClickStop(@Suppress("UNUSED_PARAMETER") view: View?) { //CRASHHH
        // setUiEnabled(false)
        // Toast.makeText(this, "Hi there! This is a Toast.", Toast.LENGTH_SHORT).show()
        //serialPort!!.close()
        serialPort?.close()
        //tvAppend(statusText, "\nSerial Connection Closed! \n") //Serial status message
    }

    private fun tvAppend(tv: TextView?, text: CharSequence) { // Print status messages
        runOnUiThread {
            tv!!.text = text
        }
    }

    private fun heatMap(data: String) {

        textView2?.text = data

        if (data.toInt() >= 1000) {
            textView2?.setBackgroundColor(Color.GREEN)
        } else if (data.toInt() >= 750) {
            textView2?.setBackgroundColor(Color.YELLOW)
        } else if (data.toInt() >= 500) {
            textView2?.setBackgroundColor(Color.rgb(255, 165, 0))
        } else if (data.toInt() >= 250) {
            textView2?.setBackgroundColor(Color.RED)
        } else if (data.toInt() >= 0) {
            textView2?.setBackgroundColor(Color.BLACK)
        }
    }

    private fun timescale(data: String) {

        storeList.add(data.toInt())

        var arraySize = storeList.size


        seekBar!!.max = arraySize - 1
        textView!!.text = storeList.size.toString()


        seekBar?.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
                seekText!!.text = storeList[progress].toString()

                if (storeList[progress] >= 1000) {
                    seekText?.setBackgroundColor(Color.GREEN)
                } else if (storeList[progress] >= 750) {
                    seekText?.setBackgroundColor(Color.YELLOW)
                } else if (storeList[progress] >= 500) {
                    seekText?.setBackgroundColor(Color.rgb(255, 165, 0))
                } else if (storeList[progress] >= 250) {
                    seekText?.setBackgroundColor(Color.RED)
                } else if (storeList[progress] >= 0) {
                    seekText?.setBackgroundColor(Color.BLACK)
                }

            }

            override fun onStartTrackingTouch(seekBar: SeekBar?) {
            }

            override fun onStopTrackingTouch(seekBar: SeekBar?) {
            }
        })
    }
}

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".Surfboard"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/surfboard"
>

    <!--Table Layout with 3 rows and each row with 3 buttons-->
    <TableLayout
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerInParent="true"
        android:rowCount="3"
        android:columnCount="3"
        android:padding="8dp">

        <Button
            android:id="@+id/buttonStart"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onClickStart"
            android:text="@string/Begin"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/statusText"
            android:layout_below="@+id/buttonSend"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_alignParentBottom="true" />

        <Button
            android:id="@+id/activate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/activate"
            android:onClick="onClickSend"
            tools:ignore="OnClick" />

        <Button
            android:id="@+id/deactivate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onClickStop"
            android:text="@string/deactivate"/>

        <TextView
            android:id="@+id/test"
            android:layout_width="150dp"
            android:layout_height="100dp"
            android:gravity="center"
            android:textSize="32dp"
            android:textColor="#FFFFFF"
            android:background="#E0E0E0"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/textView"
            android:layout_below="@+id/buttonSend"
            android:layout_marginTop="20dp"
            android:background="#E0E0E0" />

        <SeekBar
            android:id="@+id/seekBar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="48dp"
            android:progressDrawable="@drawable/seek_bar"
            android:thumb="@drawable/seek_thumb"
            />
        <TextView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:id="@+id/seekText"
            android:gravity="center"
            android:textSize="32dp"
            android:layout_below="@+id/buttonSend"
            android:layout_marginTop="20dp"
            android:textColor="#FFFFFF"
            android:background="#E0E0E0" />
    </TableLayout>

</RelativeLayout>

Logcat

    2020-04-20 17:13:42.040 22833-22833/? E/Zygote: isWhitelistProcess - Process is Whitelisted
2020-04-20 17:13:42.042 22833-22833/? E/libpersona: scanKnoxPersonas
2020-04-20 17:13:42.042 22833-22833/? E/libpersona: Couldn't open the File - /data/system/users/0/personalist.xml - No such file or directory
2020-04-20 17:14:01.283 22833-23200/com.example.surf10 E/AndroidRuntime: FATAL EXCEPTION: Thread-5
    Process: com.example.surf10, PID: 22833
    java.lang.NumberFormatException: For input string: ""
        at java.lang.Integer.parseInt(Integer.java:620)
        at java.lang.Integer.parseInt(Integer.java:643)
        at com.example.surf10.Surfboard.timescale(Surfboard.kt:219)
        at com.example.surf10.Surfboard.access$timescale(Surfboard.kt:32)
        at com.example.surf10.Surfboard$mCallback$1.onReceivedData(Surfboard.kt:59)
        at com.felhr.usbserial.UsbSerialDevice$WorkerThread.onReceivedData(UsbSerialDevice.java:209)
        at com.felhr.usbserial.UsbSerialDevice$WorkerThread.run(UsbSerialDevice.java:184)
2020-04-20 17:14:02.116 22833-22833/com.example.surf10 E/ActivityThread: Activity com.example.surf10.Surfboard has leaked IntentReceiver com.example.surf10.Surfboard$broadcastReceiver$1@e42873b that was originally registered here. Are you missing a call to unregisterReceiver()?
    android.app.IntentReceiverLeaked: Activity com.example.surf10.Surfboard has leaked IntentReceiver com.example.surf10.Surfboard$broadcastReceiver$1@e42873b that was originally registered here. Are you missing a call to unregisterReceiver()?
        at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:1357)
        at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:1122)
        at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1428)
        at android.app.ContextImpl.registerReceiver(ContextImpl.java:1401)
        at android.app.ContextImpl.registerReceiver(ContextImpl.java:1389)
        at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:622)
        at com.example.surf10.Surfboard.onCreate(Surfboard.kt:124)
        at android.app.Activity.performCreate(Activity.java:7183)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)