isp_bad_example.kt

interface OnClickListener {
    fun onClick(v: View)
    fun onLongClick(v: View)
    fun onTouch(v: View, event: MotionEvent)
}

val button = findViewById<Button>(R.id.button)
button.setOnClickListener(object: OnClickListener{
    override fun onClick(v: View) {
        // Want to do some magic here
    }

    override fun onLongClick(v: View) {
        // No need this function
    }

    override fun onTouch(v: View, event: MotionEvent) {
        // No need this function        
    }
})