kotlin onclicklistener

button.setOnClickListener(object : View.OnClickListener {
            override fun onClick(v: View?) {
                //your implementation goes here
            }
        })

// get reference to button
val btn_click_me = findViewById(R.id.btn_click_me) as Button
// set on-click listener
btn_click_me.setOnClickListener {
    Toast.makeText(this@MainActivity, "You clicked me.", Toast.LENGTH_SHORT).show()
}