Layering Graphics

layers.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <item>
        <bitmap android:src="@drawable/a1_sq"
            android:gravity="center" />
    </item>

    <item>
        <bitmap android:src="@drawable/a2_sq"
            android:gravity="center" />
    </item>

    <item>
        <bitmap android:src="@drawable/a3_sq"
            android:gravity="center" />
    </item>

    <item>
        <bitmap android:src="@drawable/a4_sq"
            android:gravity="center" />
    </item>

    <item>
        <bitmap android:src="@drawable/four_frames_green_pat"
            android:gravity="center" />
    </item>

</layer-list>

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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.mycompany.graphictest.MainActivity">

    <ImageView
        android:layout_height="match_parent"
        android:layout_width="wrap_content"
        android:src="@drawable/layers"
        android:layout_gravity="center_horizontal" />

</LinearLayout>