вывод информации с примеров в setContentView

package com.example.socialkotlin

import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.snackbar.Snackbar
import kotlinx.android.synthetic.main.activity_main.*
import android.util.Log


// class SomeActivity : Activity(), AnkoLogger {
//     private fun someMethod() {
//         info("London is the capital of Great Britain")
//         debug(5) // .toString() method will be executed
//         warn(null) // "null" will be printed
//     }
// }




class MainActivity : AppCompatActivity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    Log.d("TAG", "----------------------message")
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    setSupportActionBar(toolbar)

    fab.setOnClickListener {
      view -> Snackbar.make(
        view,
        "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null
      ).show()
    }
  }

  override fun onCreateOptionsMenu(menu: Menu): Boolean {
    // Inflate the menu; this adds items to the action bar if it is present.
    menuInflater.inflate(R.menu.menu_main, menu)
    return true
  }

  override fun onOptionsItemSelected(item: MenuItem): Boolean {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    return when (item.itemId) {
      R.id.action_settings -> true
      else -> super.onOptionsItemSelected(item)
    }
  }
}

setContentView(R.layout.activity_main)

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/activity_main">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!9992"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>