isp_good_example.kt

interface OnClickListener {
    fun onClick(v: View)
}

interface OnLongClickListener {
    fun onLongClick(v: View)
}

interface OnTouchListener {
    fun onTouch(v: View, event: MotionEvent)
}

val button = findViewById<Button>(R.id.button)
button.setOnClickListener(object: OnClickListener{
    override fun onClick(v: View) {
       // Now we only have one method to override
    }
})