Question 127257 in Android Studio Question posted in
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Android Studio – How to reverse recyclerView items with CoordinatorLayout as root layout?

How to reverse recyclerView items with CoordinatorLayout as root layout?

    <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv_main_students"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipToPadding="true"
        android:scrollbars="vertical"
         />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

and app:reverseLayout="true" not working for recyclerview.

Note: I want reverse recyclerView not reverese collection

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2

Answers


  1. 0

    solution 1- reverse list of input data

    fun <T> reverseList(list: List<T>): ArrayList<T> {
return (list.indices)
    .map { i: Int -> list[list.size - 1 - i] }
    .toCollection(ArrayList())
}

    follow- https://www.techiedelight.com/reverse-copy-list-kotlin/

    Solution 2

    LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
mLayoutManager.setReverseLayout(true);
mLayoutManager.setStackFromEnd(true);
recyclerView.setLayoutManager(mLayoutManager);
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  2. 0

    The best solution is to reverse the list. You can do this:

    Collections.reverse(mList); // enter your list here

    In your xml add this ->

    app:stackFromEnd="true"

    NOTE: if you are doing some operations with the adapter position and the list in the adapter, then first reverse and then pass it to the adapter. Or else you gotta face and issue

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