GMAndroid/app/src/main/res/drawable/titlebar.xml

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

<!-- Shape for the title bar -->

<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
	<item>
	    <shape>
	        <gradient
	            android:angle="90"
	            android:centerY="10%"
	            android:centerX="0.1"
	            android:startColor="@color/background_bar_gradient"
	            android:endColor="@color/background_bar"
	            android:type="linear" />
	    </shape>
	</item>
</selector>