Advanced Android: [Advanced Android 03.1: Getting sensor data Task 1

[Productivix]

Describe the problem
A clear and concise description of what the problem is. the code has change with new 1.4 version of Kotlin

In which lesson and step of the codelab can this issue be found?
Lesson number + step number. (e.g., Lesson 1.1, Step 1.3)

How to reproduce?
What are the exact steps to reproduce the problem?

Versions

1. What version of Android Studio are you using?
2. What API level are you targeting?

Additional information
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codelab: advanced-android
The code is 👍
package com.productivix.sensorsurvey

import android.R.layout
import android.hardware.Sensor
import android.hardware.SensorManager
import android.os.Bundle
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
private var mSensorManager: SensorManager? = null

// Individual light and proximity sensors.
private var mSensorProximity: Sensor? = null
private var mSensorLight: Sensor? = null

// TextViews to display current sensor values
private var mTextSensorLight: TextView? = null
private var mTextSensorProximity: TextView? = null

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
  /*  mSensorManager = this.getSystemService(SENSOR_SERVICE) as SensorManager?
    val sensorList = mSensorManager?.getSensorList(Sensor.TYPE_ALL)
    val sensorText = StringBuilder()
    if (sensorList != null) {
        for (currentSensor in sensorList) {
            sensorText.append(currentSensor.name).append(
                    System.getProperty("line.separator"))
        }
    }
    val sensorTextView = findViewById<View>(R.id.sensor_list) as TextView
    sensorTextView.text = sensorText */

    mTextSensorLight = findViewById(R.id.label_light)
    mTextSensorProximity = findViewById(R.id.label_proximity)

    mSensorProximity =
            mSensorManager?.getDefaultSensor(Sensor.TYPE_PROXIMITY)
    mSensorLight = mSensorManager?.getDefaultSensor(Sensor.TYPE_LIGHT)

    val sensor_error = resources.getString(R.string.error_no_sensor)
    if (mSensorLight == null) {
        mTextSensorLight?.setText(sensor_error);
    }
    if (mSensorProximity == null) {
        mTextSensorProximity?.setText(sensor_error);
    }

}

}