session-android/res/layout/emoji_grid_layout.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="match_parent"
             android:layout_height="match_parent">

    <GridView android:id="@+id/emoji"
              android:paddingLeft="10dp"
              android:paddingRight="10dp"
              android:visibility="visible"
              android:layout_width="fill_parent"
              android:layout_height="match_parent"
              android:stretchMode="columnWidth"
              android:columnWidth="@dimen/emoji_drawer_size"
              android:horizontalSpacing="0dp"
              android:verticalSpacing="0dp"
              android:numColumns="auto_fit"
              android:gravity="center"/>

</FrameLayout>