samples/Support7Demos/res/layout/animated_recycler_view.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:id="@+id/container"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                  android:orientation="horizontal"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content">

        <Button
                android:id="@+id/deleteButton"
                android:layout_weight=".5"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:onClick="deleteItem"
                android:text="@string/delete_item"/>

        <Button
                android:layout_weight=".5"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:onClick="addItem"
                android:text="@string/add_item"/>

        <Button
                android:layout_weight=".5"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:onClick="addDeleteItem"
                android:text="@string/add_delete_item"/>

        <Button
                android:layout_weight=".5"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:onClick="deleteAddItem"
                android:text="@string/delete_add_item"/>

        <Button
                android:layout_weight=".5"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:onClick="d1a2d3"
                android:text="@string/d1a2d3"/>

    </LinearLayout>

</LinearLayout>