[Google Now shortcut] Add Android app as a replacement for the Google Now shortcut (swipe up on home button) #android

AndroidManifest.xml

		<activity ... >
			<intent-filter>
				<action android:name="android.intent.action.ASSIST"/>
				<category android:name="android.intent.category.DEFAULT"/>
			</intent-filter>
			<meta-data
				android:name="com.android.systemui.action_assist_icon"
				android:resource="@drawable/ic_assist"
				/>
		</activity>

ic_assist.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
	<item
		android:state_enabled="true"
		android:state_active="false"
		android:state_focused="false"
		android:drawable="@drawable/ic_assist_normal"
		/>
	<item
		android:state_enabled="true"
		android:state_active="true"
		android:state_focused="false"
		android:drawable="@drawable/ic_assist_active"
		/>
	<item
		android:state_enabled="true"
		android:state_active="false"
		android:state_focused="true"
		android:drawable="@drawable/ic_assist_active"
		/>
</selector>

ic_assist_normal and ic_assist_active should be 75x75 dp large.

It looks best to have an all-white icon on a transparent background for 'normal' and a transparent icon on a circular white background for 'active'. Be sure to add a shadow to both images in case they appear on a white background. On Lollipop there's always a white (circular) background behind the icon and only the 'normal' is used.