Unresolved reference in kotlin with id and activity_main

Question

I'm actually creating a new app in kotlin to display an xml file in boxes with the informations formatted

To problem is that when I'm building the app, there is the activity_main, the id that return "Unresolved reference"

Unresolved reference: id Unresolved reference: id 

Here the MainActivity.kt

package com.example.instantsystem  import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.widget.ArrayAdapter import android.widget.ListView import java.io.IOException  class MainActivity : AppCompatActivity() {      override fun onCreate(savedInstanceState: Bundle?) {         super.onCreate(savedInstanceState)         setContentView(R.layout.activity_main)         val listView = findViewById<ListView>(id.listView)         var employees: List<Employee>? = null         try {             val parser = XmlPullParserHandler()             val istream = assets.open("employees.xml")             employees = parser.parse(istream)              val adapter = ArrayAdapter(this, R.layout.simple_list_item_1, employees)             listView.adapter = adapter          } catch (e: IOException) {             e.printStackTrace()         }     } } 

Here the activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout      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"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.example.instantsystem.MainActivity">      <ListView         android:id="@+id/listView"         android:layout_width="match_parent"         android:layout_height="wrap_content" >      </ListView>  </android.support.constraint.ConstraintLayout> 

I don't understand the error, I imported the package and defined it in xml. What is wrong in my code ?

Answer 1

In my case removing import android.R solved the issue.

Answer 2

remove import android.R from imports which might be imported automatically.