How to implement changing the appearance of RecyclerView depending on the device's screen orientation?

To change the appearance of RecyclerView depending on the screen orientation, you can use different LayoutManagers or different XML layouts.

Example implementation in an Activity or Fragment:

val recyclerView: RecyclerView = findViewById(R.id.recyclerView)

if (resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE) {
    // In landscape orientation, use GridLayout with 2 columns
    recyclerView.layoutManager = GridLayoutManager(this, 2)
} else {
    // In portrait orientation, use LinearLayout vertically
    recyclerView.layoutManager = LinearLayoutManager(this)
}

recyclerView.adapter = myAdapter

You can also define different resources for different orientations, such as different layout files or resource values, to adapt the appearance of elements.