Disabling background window rendering

In most games, developers generally lean toward full-screen modes. This may not seem obvious since we see no real difference visually, but the Android OS doesn't realize which applications are running in full-screen. What this means is that the background window will continue to be drawn underneath our application unless otherwise specified in the AndroidManifest.xml. In this topic, we're going to cover how to disable background rendering to improve application FPS, mainly benefiting lower-end devices.

Getting ready...

The first thing we must do in order to stop the background windows from rendering is create a theme for our application. We will do this by adding a new xml file to our project's res/values/ folder, called theme.xml.

Overwrite all code in the default xml file with the following code and save the file:

<?xml version="1.0" encoding="UTF-8"?>
<resources>
    <style name="Theme.NoBackground" parent="android:Theme">
        &lt...