customViewBasic.kt

class KotlinView : View {
    constructor(context: Context) : this(context, null)
    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
    }
    
    override fun onDraw(canvas: Canvas?) {
        //Draw things here
    }
}