MainActivity2.kt

package com.example.myapplication

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.view.View
import android.widget.Button
import com.example.myapplication.R
import kotlin.system.exitProcess

class MainActivity2 : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)

        val btntry = findViewById<Button>(R.id.btnTry)
        val exit = findViewById<Button>(R.id.btnExit)

        btntry.setOnClickListener{
            val intent = Intent(this, MainActivity::class.java)
            startActivity(intent)
        }
        exit.setOnClickListener{
            finishAffinity()
        }
    }

}