i want change the ImageResource of a ImageButton that i have find by id.

Motivation

a ImageButton(bottom) works as a reminder/backup of the last click of a ImageButton(top) .

setup:

• some ImageButton (at the top of the app).
• a ImageButton (at the bottom of the app).

example without errors, but don't find ImageResource of idR1

findViewById<ImageButton>(idR1).setOnClickListener {
    findViewById<ImageButton>(idR5_oppCiv).setImageResource(R.drawable.athen_cavalry_swordsman);

not working examples

findViewById<ImageButton>(idR1).setOnClickListener {
    findViewById<ImageButton>(idR5_oppCiv).setImageResource(it.resources.getDrawable());

findViewById<ImageButton>(idR1).setOnClickListener {
    findViewById<ImageButton>(idR5_oppCiv).setImageResource(it.getImageResource());

try to get and set Drawable

following causes the app to crash when i click on an ImageButton. Here i use a defType "res" to get the resource (the image hopefully).

val resR1: Int = resources.getIdentifier("r1col$i", "res", this.packageName)
findViewById<ImageButton>(idR1).setOnClickListener {
    findViewById<ImageButton>(idR5_oppCiv).setImageDrawable(getDrawable(resR1))

How could i get this image resource of it ? And use it for the other ImageButton?

You should be setting the image like using setImageDrawable like this.

    val image = findViewById<ImageButton>(R.id.your_view_id)
    image.setOnClickListener {
    findViewById<ImageButton>(idR5_oppCiv).setImageDrawable(image.drawable)
}