package com.example.myfirstapp

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

class MainActivity : AppCompatActivity() {
    
    private lateinit var textView: TextView
    private lateinit var button: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        
        textView = findViewById(R.id.textView)
        button = findViewById(R.id.button)
        
        button.setOnClickListener { view ->
            textView.text = "Вы нажали кнопку!"
        }
    }
}