Tutorial GridView

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.jonesrandom.tutorialgridview.MainActivity">

    <GridView
        android:layout_margin="5dp"
        android:id="@+id/listGrid"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:horizontalSpacing="5dp"
        android:numColumns="2"
        android:stretchMode="columnWidth"
        android:verticalSpacing="5dp" />
</LinearLayout>