<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <bitmap
            android:gravity="center"
            android:src="@drawable/1"
            android:tileMode="clamp" />
    </item>
    <item>
        <bitmap
            android:gravity="bottom"
            android:src="@drawable/2" />
    </item>
    <item>
        <bitmap
            android:gravity="top"
            android:src="@drawable/3" />
    </item>
</layer-list>