CODEWITHSUNDEEP
androidandroid-recyclerviewgridlayoutmanager
JackTheCripple
JackTheCripple

Reputation: 803

How to center RecyclerView items horizontally with vertical GridLayoutManager

I have a vertical RecyclerView using a GridLayoutManager. I want each column to be centered, but the columns begin all the way on the left. In the following picture you can see what I'm talking about. I used the ugly color scheme to illustrate the columns and background. The green is the background for each item in the RecyclerView, the red is the background of the RecyclerView itself:

https://i.sstatic.net/DGGTY.jpg

I'm setting it up with:

mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));

Here's the column_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="120dp"
              android:layout_height="180dp"
              android:orientation="vertical"
              android:padding="4dp">

    <ImageView
        android:id="@+id/movie_column_photo"
        android:layout_width="80dp"
        android:layout_height="120dp"/>

    <TextView
        android:id="@+id/movie_column_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</LinearLayout>

Here's the recyclerview xml:

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/company_details_recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical">
    </android.support.v7.widget.RecyclerView>
</LinearLayout>

Upvotes: 73

Views: 62603

Answers (4)

Marawan Mamdouh
Marawan Mamdouh

Reputation: 1015

Simply set the width of the root layout for your column_item.xml to match_parent will center RecyclerView items horizontally.

Upvotes: 1

elyar abad
elyar abad

Reputation: 788

To restate @kris larson's answer;

If you are using ConstraintLayout, adding android:layout_gravity="center" or android:layout_gravity="center_horizontal" to the parent layout in item's XML would be enough (the first parent in hierarchy).

In your case, the codes would be something similar to this:

<android.support.constraint.ConstraintLayout
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_width="match_parent"
        android:layout_height="180dp"
        android:orientation="vertical"
        android:padding="4dp"
        android:layout_gravity="center">

        <ImageView

            android:id="@+id/movie_column_photo"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            android:layout_width="80dp"
            android:layout_height="120dp"/>

        <TextView
            android:id="@+id/movie_column_title"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

</android.support.constraint.ConstraintLayout>

Upvotes: 3

AJ Seraspi
AJ Seraspi

Reputation: 113

Wrap your recyclerview inside the constraintlayout, something like this:

<androidx.constraintlayout.widget.ConstraintLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent" >

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/book_list"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:spanCount="2" />

Hope it helps!!

Upvotes: -4

kris larson
kris larson

Reputation: 30995

Try letting the column item fill the width of the column while centering everything inside:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="180dp"
              android:orientation="vertical"
              android:padding="4dp">

    <ImageView
        android:id="@+id/movie_column_photo"
        android:layout_width="80dp"
        android:layout_height="120dp"
        android:layout_gravity="center_horizontal"/>

    <TextView
        android:id="@+id/movie_column_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"/>
</LinearLayout>

Upvotes: 181

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