Recycler view showing single item

Try changing the layout used in your item view to FrameLayout. Here is an example.

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/item"
    android:layout_width="match_parent"
    android:layout_height="?listPreferredItemHeight"
    android:clickable="true"
    android:focusable="true"
    android:foreground="?selectableItemBackground">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"/>
</FrameLayout>

when you are creating row.xml for recyclerview should follow these things:

1. Always use "wrap_content" for the height of the row otherwise in "match_parent" it will occupy the whole screen for a single row.

2. You can also take the height in dp.

My mistake was I accidentally used:

LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)

instead of:

LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)

Don't use match_parent for height for your item view. One item fills whole screen vertically so you don't see another.