Battery saving overlay in its simplest form.

link.html

<!-- download this file and include it in res/drawable -->
<a href="https://dl.dropboxusercontent.com/u/2026413/battery_saver_tile.png">battery_saver_tile.png</a>

<!-- for you GIMPers out there: here's the .xcf file I created -->
<a href="https://dl.dropboxusercontent.com/u/2026413/battery_saver_tile.xcf">battery_saver_tile.xcf</a>

<!-- before -->
<a href="https://www.dropbox.com/s/b0qirkuraf29r10/Screenshot%202014-11-13%2021.00.49.png?dl=0">before</a>

<!-- after -->
<a href="https://www.dropbox.com/s/uq4t0rme9aww1fb/Screenshot%202014-11-13%2021.02.24.png?dl=0">after</a>

mylayout.xml

<FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/tilebackground"
        android:visibility="visible"/>

tilebackground.xml

<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/battery_saver_tile"
    android:tileMode="repeat"
    android:dither="true" />