activity.xml

<?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:id="@+id/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Hello World!"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><Buttonandroid:layout_width="200dp"android:layout_height="100dp"android:id="@+id/btn1"android:text="@string/click"tools:ignore="MissingConstraints" />
</androidx.constraintlayout.widget.ConstraintLayout>

 MainActivity.kt

package com.example.myapplicationimport android.annotation.SuppressLint
import android.content.Intent
import android.os.Bundle
import android.widget.Button
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompatclass MainActivity : AppCompatActivity() {@SuppressLint("MissingInflatedId")override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)enableEdgeToEdge()setContentView(R.layout.activity_main)var btn:Button = findViewById(R.id.btn1)btn.setOnClickListener {val intent = Intent(this,MainActivity2::class.java)startActivity(intent)}}
}