GridLayout, as the name suggests is a layout used to arrange Views in a grid. A GridLayout divides itself into columns and rows. As you can see in the example below, the amount of columns and/or rows is specified by the properties columnCount and rowCount. Adding Views to this layout will add the first view to the first column, the second view to the second column, and the third view to the first column of the second row.
<?xml version="1.0" encoding="utf-8"?>
<GridLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:columnCount="2"
android:rowCount="2">
<TextView
android:layout_width="@dimen/fixed"
android:layout_height="wrap_content"
android:text="@string/first"
android:background="@color/colorPrimary"
android:layout_margin="@dimen/default_margin" />
<TextView
android:layout_width="@dimen/fixed"
android:layout_height="wrap_content"
android:text="@string/second"
android:background="@color/colorPrimary"
android:layout_margin="@dimen/default_margin" />
<TextView
android:layout_width="@dimen/fixed"
android:layout_height="wrap_content"
android:text="@string/third"
android:background="@color/colorPrimary"
android:layout_margin="@dimen/default_margin" />
</GridLayout>