Fixing Bluetooth-off crashing on Android 12 and higher

Bluetooth Android 12

@RequiresApi(Build.VERSION_CODES.M)
@AndroidEntryPoint
class MainActivity : ComponentActivity() {

    private val bluetoothManager by lazy {
        applicationContext.getSystemService(BluetoothManager::class.java)
    }
    private val bluetoothAdapter by lazy {
        bluetoothManager?.adapter
    }

    private val isBluetoothEnabled: Boolean
        get() = bluetoothAdapter?.isEnabled == true

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val enableBluetoothLauncher = registerForActivityResult(
            ActivityResultContracts.StartActivityForResult()
        ) { /* Not needed */ }

        val permissionLauncher = registerForActivityResult(
            ActivityResultContracts.RequestMultiplePermissions()
        ) { perms ->
            val canEnableBluetooth = if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                perms[Manifest.permission.BLUETOOTH_CONNECT] == true
            } else true

            if(canEnableBluetooth && !isBluetoothEnabled) {
                enableBluetoothLauncher.launch(
                    Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
                )
            }
        }

        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            permissionLauncher.launch(
                arrayOf(
                    Manifest.permission.BLUETOOTH_SCAN,
                    Manifest.permission.BLUETOOTH_CONNECT,
                )
            )
        }

        setContent {
            BLETutorialTheme() {
                Navigation(
                    onBluetoothStateChanged = {
                        showBluetoothDialog()
                    }
                )
            }
        }
    }

    override fun onStart() {
        super.onStart()
        showBluetoothDialog()
    }

    private var isBluetootDialogAlreadyShown = false
    private fun showBluetoothDialog(){
        if(!bluetoothAdapter?.isEnabled!!){
            if(!isBluetootDialogAlreadyShown){
                val enableBluetoothIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
                startBluetoothIntentForResult.launch(enableBluetoothIntent)
                isBluetootDialogAlreadyShown = true
            }
        }
    }

    private val startBluetoothIntentForResult =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()){ result ->
            isBluetootDialogAlreadyShown = false
            if(result.resultCode != Activity.RESULT_OK){
                showBluetoothDialog()
            }
        }

}