Buttons in a RelativeLayout disappear after changing LayoutParams

Issue

I have five buttons in a Relative layout, if I try to change their height dynamically, some buttons disappear.

How buttons are looking before clicking

Buttons after clicking

val w = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 45f, resources.displayMetrics)
    btn_ran.setOnClickListener {
        btn_1.layoutParams = RelativeLayout.LayoutParams(w.toInt(), 700)
        btn_3.layoutParams = RelativeLayout.LayoutParams(w.toInt(), 700)
        btn_4.layoutParams = RelativeLayout.LayoutParams(w.toInt(), 700)
        btn_2.layoutParams = RelativeLayout.LayoutParams(w.toInt(), 700)
        btn_5.layoutParams = RelativeLayout.LayoutParams(w.toInt(), 700)

    }

All I want to do is to change all of the button's height randomly on the click of a button.

Solution

If You only want to change height to random value You can do it in this way:

button1.setOnClickListener {
    val h = (100..500).random() //random integer between 100 and 500
    button1.layoutParams.height = h
    button2.layoutParams.height = h
    button1.requestLayout() //refresh layout
}

Answered By - iknow