如何使 Grid RecyclerView 项目居中？

Question

I have a recycler view using grid layout manager. I did my item view to have the witdh = match_parent to make my items to have equal width depending on the screen width. But there is also constraint which is max width for my item view. So, if the span count is small, all my items are aligned by the left, but I want those items to be aligned by the center.

Examples:

In case 1, everything is ok. In case 2, items are not centered. PS I tried layout_gravity = center, gravity = center, it does not help

Answer 1

Try this out.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center" >

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/question_recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#f0f4fd" 
        android:layout_gravity="center"
        android:layout_centerInParent="true"/>

</RelativeLayout>

Answer 2

In the row's xml, it is necessary to align the elements to the center

Answer 3

In your item layout, don't use wrap_content , or a fixed size, in layout_width . You should use match_parent as layout_width .