Change layout Manager programatically in recylerview android

Question

I want to change layoutmanager stackFromEnd and reverseLayout change when view is inflated. I have nested recylerview. So when recylerview inflated, i need to check that recylerview has more item than single screen i.e. I have more than items to scroll. I will show in image.

Also other condition when item is half cut from bottom edge.

.

On that basis I want to change layout on that. Is it possible to that and how? I tried to some stack overflow Example but it not's work. So anyone know how to achieve that thing?.

So I wonder if there is any listener that is called when the RecyclerView has finished laying down its items for the first time, making it possible to set the layout manager.

Sorry that, I may have a misunderstanding about the question, so, are you attempting to have a load more mechanism? — Putra Nugraha, Oct 26 '21 at 01:14
@PutraNugraha I want to check that RV has more item, i.e. RV items are not fitting on first time when view is inflated. — Kotlin Learner, Oct 26 '21 at 06:16
I think can get window height and then substract with total of item height (assuming you have recycler view item with fixed layout_height). But probs, this is not the best practice — Putra Nugraha, Oct 26 '21 at 07:39
Sure, Im putting it as answer in here: https://stackoverflow.com/a/69731094/10467286 — Putra Nugraha, Oct 26 '21 at 23:40

score 1 · Accepted Answer · answered Oct 26 '21 at 23:39

Im assuming you have a parent view for your recycler views, e.g. NestedScrollView. Then you will need to get the height of your NestedScrollView after it being created in your screen

var nestedScrollViewHeight = 0
yourNestedScrollView.viewTreeObserver.addOnGlobalLayoutListener(
            object : ViewTreeObserver.OnGlobalLayoutListener {
                override fun onGlobalLayout() {
                    yourNestedScrollView.viewTreeObserver.removeOnGlobalLayoutListener(this)
                    nestedScrollViewHeight = yourNestedScrollView.height
                }
            }
        )

And then you can check whether this NestedScrollView height surpass your screen height, you can get your screen height using windowManager in Activity

val screenHeight = windowManager.currentWindowMetrics.bounds.height()

So, after obtaining both screenHeight and nestedScrollViewHeight you can then substract to check whether nestedScrollViewHeight is larger than screenHeight

thanks for example. Where need to put this code inside my activity or in my first adapter where I'm setting my second adapter?. Also if in my activity how can i acces my second adapter RV? — Kotlin Learner, Oct 27 '21 at 07:22
I think need you to update your question by put your code, that should make clear where to put this code — Putra Nugraha, Oct 28 '21 at 01:38

Change layout Manager programatically in recylerview android

1 Answers1